Gary's Garagemahal (the Bullnose bible)
  • Bullnose Forum
    • Guidelines
    • Ford Truck Show
    • Forum FAQ's
    • Member's Map
    • Forum & Website Issues
    • Test Forum
    • Smilies
  • Documentation
    • Accessories >
      • Air Horns
      • CB Radio
      • Roll Bar
      • Step
      • Tie Down Hooks
      • Tonneau Cover
    • Body >
      • Bronco Rear Window
      • Body Shell, Exterior Trim, Frame & Underbody
      • Door Latches & Locks
      • Door Hinges Checks & Weatherstrips
      • Doors Hood & Tailgate General Service
      • Front Door Window Glass & Mechanisms
      • Hood & Hinges
      • Hood Latch
      • Lock Cylinders & Keys
      • Power Door Locks
      • Power Windows
      • Stationary Glass - Butyl Seal
      • Stationary Glass - Weatherstrip Seal
      • Tailgate
      • Vent Window Mechanism
      • Window Glass & Mechanisms - General Service
    • Bullnose FAQ's
    • Bullnose Upgrades
    • Calibration Info & Part #'s
    • Cooling Systems >
      • Cooling Fan #'s & Illustrations
      • Cooling System Illustrations
      • Coolant Recovery & Windshield Washer Reservoirs
      • Elbows
      • Heater Hoses
      • Hose Clamps
      • Radiator Hoses
      • Radiator Support
      • Radiator Part #'s
      • Shroud Part #'s
      • Thermostats
      • Water Pump #'s & Illustrations
    • Driveline >
      • 4WD Front Hubs & Rotors
      • Axles & Differentials
      • Bell Housings
      • Brakes
      • Calculators
      • Clutches and Linkage
      • Drive Shafts
      • Engine Plates
      • Rear Axle Vents
      • Skid Plates
      • Transfer Cases
      • Transmissions >
        • Transmission & Transfer Case Ratios
        • Automatic Transmission >
          • Automatic Transmission Applications
          • General Automatic Transmission Service
          • Automatic Overdrive (AOD)
          • C6
          • Kickdown Linkage
          • Neutral Start Switch
        • Manual Transmissions >
          • Manual Transmission Applications
          • General Manual Transmission Service
          • 3.03 3-Speed Toploader
          • NP435
          • Single Rail Over Drive (SROD)
          • TOD & SROD Transmissions
          • TOD
          • Warner T-18 & T-19
          • ZF5
        • Over/Under Drives
      • Speedometer Gears, Cables, & Sensors
      • Wheels & Tires
      • Wheel Covers
    • Electrical >
      • 3G Conversion >
        • 3G Conversion - In Development
        • 3G Writeup From Lucas
      • Alternators
      • Ammeter
      • Batteries
      • Battery Cables
      • Battery Trays
      • Circuit Protection
      • Clocks
      • Computer Internals
      • Connectors
      • Distributors
      • Electrical Connectors
      • Electronic Engine Control (EEC)
      • Electricity 099
      • EVTM >
        • 1980 EVTM
        • 1981 EVTM
        • 1985 EVTM
        • 1986 EVTM
        • 1996 EVTM >
          • Index
          • Charging System
          • Daytime Running Lamps
          • Engine Control - 4.9L
          • Engine Control - 5.0L
          • Engine Control - 5.8L Under 8500 GVW
          • Engine Control - 5.8L Over 8500 & 7.5L EEC-IV
          • Engine Control - 7.5L EEC-V
          • Engine Control - Turbo Diesel
          • Fuse Panel & Circuit Protection
          • Grounds
          • How To Use This Manual
          • Ignition System
          • Keyless Entry
          • Power Distribution
          • Speed Control
          • Starting System
          • Transmission Control - 4R70W
          • Transmission Control - E4OD
      • Gauges
      • Ground Wires >
        • Engine-to-Firewall Ground
        • Battery to Ground
        • Battery to RH Fender
        • Firewall to Hood
      • ICVR
      • Ignition
      • Lighting >
        • Dome and Cargo Lights
        • Fog or Driving Lights
        • Headlight Wiring Harness
        • Lighting & Calculations
        • Tag Lights
      • PMGR Starter Wiring
      • Radios
      • Relays
      • Sending Units
      • Speed Control
      • Standard Wire And Color Codes
      • Switches
      • Tachometers
      • Terminals & Connectors
      • Voltage Drop Testing
      • Windshield Wipers
      • Wiring Connectors
      • Wiring Diagrams
      • Wiring Harnesses
      • Wire Routing
    • Emissions >
      • Understanding Emissions Controls
      • Inferred Mileage
      • Thermactor Systems
    • Engines >
      • Compression Ratio Calculator
      • General Engine Service
      • 3.8L (232) V6
      • 300 Six
      • Windsor Series
      • 351M and 400
      • 385 Series
      • IDI Diesel
      • Drive Belts
      • EGR Valves >
        • EGR System Description & Testing
        • EGR Spacer
        • Gasket: Carb/EGR to Intake (9447)
      • Flywheels
      • Manifolds, EGR, Heat Valves, etc
      • Engine Swaps >
        • 300 Six to Small-Block V8
      • Pulleys
      • Starters
    • Exhaust Systems
    • Exterior >
      • Beds, Tailgates, and Components
      • Bumpers
      • Exterior Mirrors
      • Exterior Moulding Retainers
      • Exterior Trim and Moulding
      • Frames >
        • Engine Perches
      • Fuel Filler Doors
      • Name Plates
      • Push Bars
      • Spare Tire Carriers
      • Stationary Glass - Butyl Type Seal
      • Tape And Decal Application
    • Fasteners & Illustrations >
      • Fastener Pictures
      • Fenders and Aprons
      • Frame
      • Headlights and Turn Signals
      • Hood
      • Radiator and Grille
    • Fuel & Air Systems >
      • 1985-1986 Fuel System Adjustments
      • 460 Fuel Systems
      • Air Cleaners
      • Carburetors, Chokes, & EFI >
        • EFI Idle Speed Adjustment
        • Jetting
        • How To Find Carb Parts
        • Chokes
        • Carter YFA 1bbl
        • EFI
        • Edelbrock
        • Motorcraft 2150
        • Holley 4180C
        • Motorcraft 7200 VV
      • Correct Cold Starting Procedures
      • Diagnostics
      • Fuel System Illustrations >
        • Fuel Filler Pipes
        • 1980-84 F-Series & Bronco
        • 1983-84 F-Series Diesel
        • 1983-87 F350 Chassis Cab DRW
        • 1985 F-Series 302 w/EFI
        • 1985-87 Bronco
        • 1985 on F-Series
      • Fuel System Part #'s >
        • Fuel Filler Pipes
        • Fuel Senders & Pumps
        • Fuel Tanks
        • Fuel Tank Selector Switch
        • Fuel Tank Selector Valve
        • Fuel Tank Shields
        • Fuel Vapor Valve
        • Fuel Vapor Separator
      • Fuel System Wiring
    • HVAC >
      • Blend Door Repair
      • HVAC Systems
      • 300 Six Compressor Illustrations
      • Factory A/C Brackets
    • Interchange >
      • Air Conditioning Interchange
      • Alternator Interchange
      • Brake Interchange
      • Carburetor Interchange
      • Crankshaft Interchange
      • Diesel Injector Pump Interchange
      • Distributor Interchange
      • Fuel Pump Interchange
      • Head Interchange
      • Starter Interchange
      • Steering Interchange
      • Window Lift Motor Interchange
      • Water Pump Interchange
    • Interior >
      • Behind The Seat Storage
      • Boots
      • Carpet
      • Dash
      • Doors >
        • Door Locks
        • Door Panels
        • Electric Windows & Locks
        • Handles & Boot
        • Vent Windows
        • Windows
      • Horn Pads
      • Insulation
      • Interior Soft Trim
      • Interior Trim
      • Instrument Panel Name Plates
      • Instrument & Radio Bezels
      • Kick Panels
      • Knobs
      • Painting Gauge Needles
      • Rear Corner Trim
      • Rear View Mirror
      • Salvaging Rosewood
      • Seat Belts
      • Seat Interchangeability
      • Seats & Seat Tracks
      • Sill Plates
      • Steering Columns & Steering Wheels
      • Sun Visors
    • Picture Galleries >
      • 1981 F100 With 318 Miles
      • 1983 XLS Survivor
      • 1983 Ford Bronco 4x4 Dobbs-Stroppe Team Chase Car
      • 1983 Bronco Survivor
      • 1984 Bronco XLT
      • 1984 F150 XL
      • 1984 F150 Survivor
      • 1984 FORD F-150 XLT PICKUP
      • 1985 F-150 Survivor
      • 1985 F150 4×4 Flareside
      • Big Blackie
      • Big Blue >
        • Big Blues Documentation
      • Dad's Truck >
        • Air Cleaner
        • Aluminum Wheel Refinishing
        • Electrical Components >
          • Alternator
          • Battery
          • Power Distribution
        • Gauges
        • Engine
        • Frame
        • Seats
        • Transfer Case
        • Transmission
      • Rusty
    • Reference >
      • Hose & Fittings
      • Standard & Utility Parts Catalog
    • Specifications >
      • Assembly Plants
      • Axle Ratios
      • Body Codes - Interior
      • Build Sheet Interpretation
      • Dimensions and Weights
      • Interior Paint
      • Calibration Codes
      • Certification Label
      • DSO Codes
      • Electrical
      • Engine Codes
      • Exterior Paint Codes
      • 10-01 Identification Codes
      • Lubricant Specifications
      • Model Codes
      • Spring Codes
      • Standard Features And Options
      • Towing
      • Transmission Codes
      • Tape Stripe Codes >
        • Bronco Tape Stripe Codes
        • F-Series Tape Stripe Codes
      • VIN Decoding
    • Suspension & Steering >
      • 2WD Spindles
      • Alignment
      • Body Mounts
      • Crossmembers
      • Front Suspension
      • Steering >
        • General Steering Service
        • Coupling - Rag Joint
        • Manual Steering Gear Box
        • Power Steering
        • Saginaw Conversions
        • Steering Columns
        • Tie Rods and Drag Links
      • Rear Suspension >
        • Auxiliary Springs
        • Rear Springs
      • Sway Bar
    • TSB's >
      • TSB Index
      • TSB Bulletin List
      • Body/Windnoise/Water Leaks/Trim >
        • 81-06-13 Bumper Guard & Tire Carrier
        • 81-7-23 Seat Belts Become Too Tight
        • 83-3-15 Pickup Box Alignment
        • 81-06-15 Pickup Box Wood Floor Replacement
        • 83-13-4 Sheet Metal Welding Procedures
        • 83-16-17 Pickup Box Lean
        • 83-24-18 Swing-Lock Mirror Moves
        • 83-13-22 Electric Mirror Loose Glass
        • 83-24-19 Mirror Head Vibration
        • 87-01-18 Tool Box Mount
      • Electrical / Climate Control / Starting / Charging >
        • 80-4-13S A/C RAPID ON-OFF CYCLING OF COMPRESSOR CLUTCH
        • 81-1-10 FM Radio Interference
        • 81-7-24 Temperature Control Cable Too Long
        • 84-24-9 Noise - Radio Ignition Buzz
        • 87-03-07 EEC-IV Driveability TSB Summary
        • 87-07-20 Radio Ignition Noise
        • 87-21-10 EEC-IV Diagnostics
        • 88-05-07 Malfunction Indicator Light Introduction
        • 89-22-08 Emissions Maintenance Warning Module
        • 90-25-12 Speed Control
        • 96-21-04 2G Alternator Repair
      • Brakes/Steering/Suspension/Wheels >
        • 80-14-14-S STEERING
        • 81-06-04 Integral Power Steering Gear
        • 81-06-16 Front Wheel Grease Seal Gaskets
        • 81-06-17 Rear Parking Brake Cables
        • 81-2-25 REAR SUSPENSION TORQUE SPECS
        • 89-19-01 Brake Noise Recap Of TSB's
        • 89-25-16 Brake Ride Height Proportioning Valve
        • 90-13-9 Frame Cracking At Rear Shock Mount
        • 96-15-11 Frame-Rivet Replacement With Bolts
        • 97-03-10 Frame Creaking/Popping
        • Steering Gear Frame Liner
      • Engine/Cooling System/Exhaust >
        • 81-2-27 ENGINE DETONATION
        • 83-13-7 Correct Oil Fill Level
        • 83-25-21 Air Cleaner Sealing
        • 83-13-8 RTV Sealant - New Material
        • 87-06-10 Stall/No Start: TFI
        • 88-07-16 4.9L Exhaust Manifold Warping
      • Transmission/Clutch/Driveshaft/Axle >
        • 81-5-15 AOD TRANSMISSION
        • 81-06-18 Clutch Housing Fills w/Mud/Dirt
        • 81-07-25 Clutch Shudder/Chatter In Reverse
        • 81-7-26 Missing Shims On SROD
        • 82-25-16(S) Upshift Indicator Light
        • 83-3-23 Axle Lubricant Drain And Refill
        • 83-23-17 8.8" Rear Axle Vent
        • 84-24-13 Transfer Case - Grinding/Block-Out
        • 90-16-07 High Clutch Effort
      • Driveability/Fuel/Ignition/Emissions >
        • 81-6-19 Cold Driveaway Performance Improvements
        • 81-6-20 Piston Slap During Cold Driveaway
        • 81-6-21 Power Valve Vacuum Hose
        • 83-11-12-S Stall/No Start/Hessitation
        • 88-05-14 Low Oil Pressure
        • 91-25-07 IAC Bypass
        • EMW Module
      • Noise/Vibration/Ride/Squeaks/Rattles >
        • 80-1-12-S REAR SPRING SQUEAK
      • Miscellaneous/General >
        • 83-14-1 UNDERHOOD PRODUCTION STAMP RELOCATION
      • Health/Safety/Environmental Hazard information
      • CALIBRATION: 4-53F-R00
      • Fuel Cross-Flow
    • Underhood >
      • Cowl Seal
      • Engine Compartment Lamp
      • Fender Aprons
      • Jacks, Lug Wrenches, etc
      • Speed Control
      • Tool Box
    • Vacuum Systems >
      • Vacuum System Acronyms
      • Vacuum Diagrams >
        • 300 Six
        • 302/5.0L
        • 351W
        • 351M/400
        • 460 V8
      • Vacuum Fittings
      • Vacuum Reservoirs
      • Vacuum System Requirements
      • Vacuum System Testing
    • Metrics
    • About Me/Contact Me >
      • Youth Classes >
        • Automotive Maintenance >
          • Fall of 2015
        • Building Web Sites >
          • Lesson 1
          • Lesson 2
          • Lesson 3
          • LTC
        • Overview of Paul's Life, Journeys, & Works >
          • Lesson 1
          • Lesson 2
      • Projects >
        • Engine Cradle
        • Gauge Pocket
        • Rear Bumper And Spare Tire Carrier
    • Year-To-Year Differences >
      • Door Locks & Turn Signals
    • Test Page
    • 91-6-7 Sterling 10.25 Hub Leaks
  • Manuals & Literature
  • About
  • Truck Shows
    • 2020 Truck Show >
      • Entrant #1: Dad's Truck
      • Entrant #2: Big Blue
      • Entrant #3: Tommy Sides 1986 F150
      • Entrant #4: Darth/Bill Vose
      • Entrant #5: Sam Noller's 1985 Bronco
      • Entrant #6: Mein Laster
      • Entrant #7: Andre's Bronco
      • Entrant #8: Chad's Rosebud
      • Entrant #9: Matthew’s Truck of Doom
      • Entrant #10: Ron's Flareside
      • Entrant #11: Cory's Blue Mule
      • Entrant #12: Ratdude747'S 1984 F150
      • Entrant #13: Ratdude747's '95 Ranger
      • Entrant #14: Heinz' 1986 F150
      • Entrant #15: Anna's Toy
      • Entrant #16: Frank's 1981 F-150 Custom
      • Entrant # 17: Petes 1981 F150 Flareside
      • Entrant #18: Eric's F250 XLT Lariat
      • Entrant #19: Geejaypea's Georgian Hulk
      • Entrant #20: JohnnyBronco85's Bronco
      • Entrant #21: Skaeke's 1985 F150 Lariat
      • Entrant #22: Sam1982's F100
      • Entrant #23: NostraDanus' 1986 Bronco
      • Entrant #24: MarkF100's F100
      • Entrant #25: Bruce moose4x4's 1996 Bronco
      • Entrant #26: Bruce Mooose4x4's 1995 F150
      • Entrant #27: Troy/66gtk's 1983 F150 XL SWB 4x2
      • Entrant #28: Matt Wood's 1985 Bronco
      • Entrant #29: WelderScott's '78 F150
      • Entrant #30: Mehmetcelikel's Brownie Dually
      • Entrant #31: Kristopherdb's 1985 Flairside 4x4
      • Entrant #32: Clifton's Tessa
      • Entrant #33: BinFord's Beverly
      • Entrant #34: BinFord's Crackling Rosie
      • Entrant #35: Dan aka dblohowiak's 1986 F250HD
      • Entrant #36: Jonathan's 1981 F150
      • Entrant #37: Jonathan's 1995 F Superduty
      • Entrant #38: Jonathan's 1986 F350 short bed crew cab IDI
      • Entrant #39: Brian's 1986 F250
      • Entrant #40: Jay's 1986 F150
      • Entrant #41: Eddie's 1981 F100 Custom
      • Entrant #42: Nick & George's Brutus
      • Entrant #43: Matthew's 1983 F350
      • Entrant #44: Hogie's 81 F250
      • Entrant #45: TontoKowalski's 1985 F150
      • Entrant #46: Danny's 1982 Bronco
      • Entrant #47: Greg's 1980 F150 Ranger XLT
      • Entrant #48: Chris' 1982 XLS
      • Entrant #49: Chris' 1985 Bronco
      • Entrant #50: Ken & Kathy's 1977 F250
      • Entrant #51: Ken & Kathy's 1985 Flareside
      • Entrant #52: Kevin/Teach's F250 Lariat
    • 2021 Truck Show
    • 2022 Truck Show
  • New Bullnose Test Forum
  • Bullnose Forum
    • Guidelines
    • Ford Truck Show
    • Forum FAQ's
    • Member's Map
    • Forum & Website Issues
    • Test Forum
    • Smilies
  • Documentation
    • Accessories >
      • Air Horns
      • CB Radio
      • Roll Bar
      • Step
      • Tie Down Hooks
      • Tonneau Cover
    • Body >
      • Bronco Rear Window
      • Body Shell, Exterior Trim, Frame & Underbody
      • Door Latches & Locks
      • Door Hinges Checks & Weatherstrips
      • Doors Hood & Tailgate General Service
      • Front Door Window Glass & Mechanisms
      • Hood & Hinges
      • Hood Latch
      • Lock Cylinders & Keys
      • Power Door Locks
      • Power Windows
      • Stationary Glass - Butyl Seal
      • Stationary Glass - Weatherstrip Seal
      • Tailgate
      • Vent Window Mechanism
      • Window Glass & Mechanisms - General Service
    • Bullnose FAQ's
    • Bullnose Upgrades
    • Calibration Info & Part #'s
    • Cooling Systems >
      • Cooling Fan #'s & Illustrations
      • Cooling System Illustrations
      • Coolant Recovery & Windshield Washer Reservoirs
      • Elbows
      • Heater Hoses
      • Hose Clamps
      • Radiator Hoses
      • Radiator Support
      • Radiator Part #'s
      • Shroud Part #'s
      • Thermostats
      • Water Pump #'s & Illustrations
    • Driveline >
      • 4WD Front Hubs & Rotors
      • Axles & Differentials
      • Bell Housings
      • Brakes
      • Calculators
      • Clutches and Linkage
      • Drive Shafts
      • Engine Plates
      • Rear Axle Vents
      • Skid Plates
      • Transfer Cases
      • Transmissions >
        • Transmission & Transfer Case Ratios
        • Automatic Transmission >
          • Automatic Transmission Applications
          • General Automatic Transmission Service
          • Automatic Overdrive (AOD)
          • C6
          • Kickdown Linkage
          • Neutral Start Switch
        • Manual Transmissions >
          • Manual Transmission Applications
          • General Manual Transmission Service
          • 3.03 3-Speed Toploader
          • NP435
          • Single Rail Over Drive (SROD)
          • TOD & SROD Transmissions
          • TOD
          • Warner T-18 & T-19
          • ZF5
        • Over/Under Drives
      • Speedometer Gears, Cables, & Sensors
      • Wheels & Tires
      • Wheel Covers
    • Electrical >
      • 3G Conversion >
        • 3G Conversion - In Development
        • 3G Writeup From Lucas
      • Alternators
      • Ammeter
      • Batteries
      • Battery Cables
      • Battery Trays
      • Circuit Protection
      • Clocks
      • Computer Internals
      • Connectors
      • Distributors
      • Electrical Connectors
      • Electronic Engine Control (EEC)
      • Electricity 099
      • EVTM >
        • 1980 EVTM
        • 1981 EVTM
        • 1985 EVTM
        • 1986 EVTM
        • 1996 EVTM >
          • Index
          • Charging System
          • Daytime Running Lamps
          • Engine Control - 4.9L
          • Engine Control - 5.0L
          • Engine Control - 5.8L Under 8500 GVW
          • Engine Control - 5.8L Over 8500 & 7.5L EEC-IV
          • Engine Control - 7.5L EEC-V
          • Engine Control - Turbo Diesel
          • Fuse Panel & Circuit Protection
          • Grounds
          • How To Use This Manual
          • Ignition System
          • Keyless Entry
          • Power Distribution
          • Speed Control
          • Starting System
          • Transmission Control - 4R70W
          • Transmission Control - E4OD
      • Gauges
      • Ground Wires >
        • Engine-to-Firewall Ground
        • Battery to Ground
        • Battery to RH Fender
        • Firewall to Hood
      • ICVR
      • Ignition
      • Lighting >
        • Dome and Cargo Lights
        • Fog or Driving Lights
        • Headlight Wiring Harness
        • Lighting & Calculations
        • Tag Lights
      • PMGR Starter Wiring
      • Radios
      • Relays
      • Sending Units
      • Speed Control
      • Standard Wire And Color Codes
      • Switches
      • Tachometers
      • Terminals & Connectors
      • Voltage Drop Testing
      • Windshield Wipers
      • Wiring Connectors
      • Wiring Diagrams
      • Wiring Harnesses
      • Wire Routing
    • Emissions >
      • Understanding Emissions Controls
      • Inferred Mileage
      • Thermactor Systems
    • Engines >
      • Compression Ratio Calculator
      • General Engine Service
      • 3.8L (232) V6
      • 300 Six
      • Windsor Series
      • 351M and 400
      • 385 Series
      • IDI Diesel
      • Drive Belts
      • EGR Valves >
        • EGR System Description & Testing
        • EGR Spacer
        • Gasket: Carb/EGR to Intake (9447)
      • Flywheels
      • Manifolds, EGR, Heat Valves, etc
      • Engine Swaps >
        • 300 Six to Small-Block V8
      • Pulleys
      • Starters
    • Exhaust Systems
    • Exterior >
      • Beds, Tailgates, and Components
      • Bumpers
      • Exterior Mirrors
      • Exterior Moulding Retainers
      • Exterior Trim and Moulding
      • Frames >
        • Engine Perches
      • Fuel Filler Doors
      • Name Plates
      • Push Bars
      • Spare Tire Carriers
      • Stationary Glass - Butyl Type Seal
      • Tape And Decal Application
    • Fasteners & Illustrations >
      • Fastener Pictures
      • Fenders and Aprons
      • Frame
      • Headlights and Turn Signals
      • Hood
      • Radiator and Grille
    • Fuel & Air Systems >
      • 1985-1986 Fuel System Adjustments
      • 460 Fuel Systems
      • Air Cleaners
      • Carburetors, Chokes, & EFI >
        • EFI Idle Speed Adjustment
        • Jetting
        • How To Find Carb Parts
        • Chokes
        • Carter YFA 1bbl
        • EFI
        • Edelbrock
        • Motorcraft 2150
        • Holley 4180C
        • Motorcraft 7200 VV
      • Correct Cold Starting Procedures
      • Diagnostics
      • Fuel System Illustrations >
        • Fuel Filler Pipes
        • 1980-84 F-Series & Bronco
        • 1983-84 F-Series Diesel
        • 1983-87 F350 Chassis Cab DRW
        • 1985 F-Series 302 w/EFI
        • 1985-87 Bronco
        • 1985 on F-Series
      • Fuel System Part #'s >
        • Fuel Filler Pipes
        • Fuel Senders & Pumps
        • Fuel Tanks
        • Fuel Tank Selector Switch
        • Fuel Tank Selector Valve
        • Fuel Tank Shields
        • Fuel Vapor Valve
        • Fuel Vapor Separator
      • Fuel System Wiring
    • HVAC >
      • Blend Door Repair
      • HVAC Systems
      • 300 Six Compressor Illustrations
      • Factory A/C Brackets
    • Interchange >
      • Air Conditioning Interchange
      • Alternator Interchange
      • Brake Interchange
      • Carburetor Interchange
      • Crankshaft Interchange
      • Diesel Injector Pump Interchange
      • Distributor Interchange
      • Fuel Pump Interchange
      • Head Interchange
      • Starter Interchange
      • Steering Interchange
      • Window Lift Motor Interchange
      • Water Pump Interchange
    • Interior >
      • Behind The Seat Storage
      • Boots
      • Carpet
      • Dash
      • Doors >
        • Door Locks
        • Door Panels
        • Electric Windows & Locks
        • Handles & Boot
        • Vent Windows
        • Windows
      • Horn Pads
      • Insulation
      • Interior Soft Trim
      • Interior Trim
      • Instrument Panel Name Plates
      • Instrument & Radio Bezels
      • Kick Panels
      • Knobs
      • Painting Gauge Needles
      • Rear Corner Trim
      • Rear View Mirror
      • Salvaging Rosewood
      • Seat Belts
      • Seat Interchangeability
      • Seats & Seat Tracks
      • Sill Plates
      • Steering Columns & Steering Wheels
      • Sun Visors
    • Picture Galleries >
      • 1981 F100 With 318 Miles
      • 1983 XLS Survivor
      • 1983 Ford Bronco 4x4 Dobbs-Stroppe Team Chase Car
      • 1983 Bronco Survivor
      • 1984 Bronco XLT
      • 1984 F150 XL
      • 1984 F150 Survivor
      • 1984 FORD F-150 XLT PICKUP
      • 1985 F-150 Survivor
      • 1985 F150 4×4 Flareside
      • Big Blackie
      • Big Blue >
        • Big Blues Documentation
      • Dad's Truck >
        • Air Cleaner
        • Aluminum Wheel Refinishing
        • Electrical Components >
          • Alternator
          • Battery
          • Power Distribution
        • Gauges
        • Engine
        • Frame
        • Seats
        • Transfer Case
        • Transmission
      • Rusty
    • Reference >
      • Hose & Fittings
      • Standard & Utility Parts Catalog
    • Specifications >
      • Assembly Plants
      • Axle Ratios
      • Body Codes - Interior
      • Build Sheet Interpretation
      • Dimensions and Weights
      • Interior Paint
      • Calibration Codes
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YOUR CART

speedometer gears, Cables, & Sensors

How to find the right gears to calibrate your speedometer.
One of the perennial questions is "What gears do I need to use to get the speedo to read correctly?"  "It depends" is the best answer as there are several variables involved, including the rear tire size, or more correctly the tire's rolling diameter, the rear axle ratio, the speedometer drive gear, and the speedometer driven gear.

But the terms "drive gear" and "driven gear" are somewhat confusing, so here's are definitions:

  • Drive Gears: This is the gear that is on the output shaft of the transmission if the truck is a 2wd, or on the output shaft of the transfer case if it is a 4wd.  The Drive Gear tab lists the drive gears used for each year, transmission or transfer case, and axle ratio.  But, the Driven Gear tab also lists the drive gear in the tables, so you can look the drive gear up there as well.
  • ​Driven Gears: This is the gear that is on the end of the speedometer cable that plugs into either the transmission or transfer case depending on if it is 2wd or 4wd.  And the Driven Gear tab lists the driven gears used for each axle ratio, specific transmission, and tire size.

Ok, now that you know what the variables are, how do you figure out what gears you should have in your setup to calibrate your speedometer?  To solve those I offer the calculators shown on the Calculator tab.
  • Drive Gear Part #'s
  • Driven Gear Part #'s
  • Calculators
  • Speedo Cables
  • Speed Control Sensors
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As said, the drive gear is the gear on the output shaft of the transmission or transfer case.  Ford used 6, 7, and 8-toothed drive gears for the 1980 - 86 trucks, and the determination of which to use was based primarily on the rear axle ratio of the vehicle.  However, there were apparently some other circumstances that changed things because according to the following tables the Broncos sometimes got a smaller driven gear than a pickup when using the same axle ratio.

Anyway, the drive gears used on these trucks come in several "types", as shown to the right.  (Click on the illustration to have it open larger.)
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Here are two tables to let you figure out which part # goes with which type.  Note that the first chart is by type, and the second chart is by ID number.  And, note that the 2nd chart has two sets of columns.Here are two tables to let you figure out which part # goes with which type.  Note that the first chart is by type, and the second chart is by ID number. 
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And now to the year-by-year tables.  Here you pick your year, transmission or transfer case, and axle ratio to determine the correct drive gear.  On the other hand, you could go to the Driven Gear tab and look the drive gear up by gear ratio, transmission, and tire size.

Also, see the note below that says that a "$" in the Drive Gear column means that the gear is actually part of the transmission's output shaft and is, therefore, not replaceable.  That was standard on the automatic transmissions.
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The Bullnose (1980-86) trucks take the Type 2 & 2a driven gears, as shown in the chart to the right.  (Click on it to make it larger.)


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Fortunately Ford color-coded the gears, as shown in the chart below:
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Ok, so now we know what it looks like, and how many teeth and what color each part number is, but what part number do we need?  Here are the tables to let you determine that based on your rear axle ratio and tire size.  However, while this page was intended for to be for the driven gears, the tables also show the drive gears.  Also, the tire sizes listed in these tables are the old-style sizes, so you will have to translate.
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The target speedometer shaft speed is 1,000 RPM.  The following calculators use that info to let you find the right gear combo to get the speedo reading correctly:
  • Correct Speedo Error
  • Set Up Gearing
  • Comparative
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This simple calculation lets you determine what driven gear you need in order to correct an error in the speedometer's readout.

The blue cells are required input, and the green cells are the output:
  1. Enter the true speed for this test, usually determined by GPS in the cell currently showing "71"
  2. Enter the reading your speedometer gives at that true speed in the cell that currently has "75"
  3. Enter the # of teeth on your current driven gear, the one on the end of your speedometer cable, in the cell that currently has "20"
  4. The cell that originally had "21" will now show the gear you need in order to get as close as possible to a true MPH reading on the speedometer
  5. The cell that originally had "71.4" will now show the readout your speedometer will actually have​​
Note to self: This file is in Website/Driveline/Speedometer/Speedo Gears and is Simple Speedo Calculator.
This calculator is from my friend Steve Hodgson, and it allows you to set up the complete speedometer system, including the drive gear, driven gear, and even an adaptor box if needed.
If you want to do what-if comparisons of two different setups to see which will be most accurate on the speedometer, this calculator is the one to use.  Enter the variables in blue and read the output in green.
Before getting into part numbers and lengths for speedometer cables, we should discuss how to remove the cable from the speedometer.  It is actually very easy - if you know how.

In the picture on the left, below, the cable is locked onto the speedometer.  But in the picture on the right the cable is released, just by pushing the tab on the Nylon lock ring.  It is that easy.  However, you shouldn't be pulling on the cable when you push the tab as the latch may not release.  Push on the tab and then gently pull the cable off.

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  • W/O Speed Control
  • With Speed Control
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If you decode the info below you'll discover that from 1980 through 1985 the speedo cable used with trucks with speed control consisted of two parts - and upper cable, which is part number E0TZ 9A820-F, and a lower cable which varies by application.  But in 1986 that changed to being a one-piece cable.

However, if you think about it that can cause some confusion as the two-piece cable was used so they could put a speed sensor in the cable to tell the speed control how fast the truck was going.  What happened was that for 1986 the speed sensor was moved to the bottom of the cable and was inserted into the transmission for 2wd vehicles or the transfer case for 4wd vehicles.  Click on the Speed Control Sensors tab, above, for more info on them.

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Trucks with speed control, aka cruise control, had a sensor to determine vehicle speed.  From 1980 through 1985 those were in the speedometer cable under the brake master cylinder, as shown on the left, below.  But in 1986 they moved to the end of the speedometer cable and were inserted into the transmission for 2wd vehicles or into the transfer case for 4wd vehicles, as shown on the right, below.
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The 1980 - 85 speed sensor is part number D4AZ 9E731-B, as shown below, and is Motorcraft DY-145 and is marked D4AF 9E731.  Then in 1986 they changed to the sensor that went in the tranny or t-case, which is part number E3AZ 9E731-A and it is Motorcraft DY-382.  Then in April of 1989 they introduced a new sensor with part number E9TZ 9E731-A, which replaced the E3 part but still uses the same cable.
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