Speedo gear

I just put 31" tires on my bronco I had 35's I have 4.56 gears where can I find a speedo gear to get my speedometer to be accurate

I don't believe a 90 uses a speedo gear. Meisk5 has the reference information for correcting the reading.

YO WileE7

The 90 speedo gears are in transfer case tailshaft; Fred; 92-96 have the PSOM w/no gears nor cable for speedo/odometer

Ford dealers will have them as well as;

http://www.fordracingparts.com/download/charts/142.pdf

http://www.summitracing.com/search/Department/Gauges-Accessories/Part-Type/Speedometer-Gears/'>http://www.summitracing.com/search/Department/Gauges-Accessories/Part-Type/Speedometer-Gears/

http://www.summitracing.com/search/Department/Gauges-Accessories/Part-Type/Speedometer-Gears/

And this is by Fred



also

Gear Change Calculator w/Ford Part Numbers, Colors, & Tooth Count

Source: by Chris B (Blue, bronco boy) at http://www3.bc.sympatico.ca/cbradley/speedogearchange.html

Use the following formula to calculate the Tire Rev. per Mile for the above formula.

Tire Rev. per Mile = 20168

Tire Diameter (inches)

Automatic Transmissions with 7 Tooth Drive Gear

1983-1989 Automatic Transmissions

Part Number

Description

D0AZ-17271-A

2.73 Gear Ratio / Blue 16 Speedo Gear

C7AZ-17271-B

3.08 Gear Ratio / Gray 18 Speedo Gear

C7VY-17271-A

3.27 Gear Ratio / Tan 19 Speedo Gear

C8SZ-17271-B

3.55 Gear Ratio / Orange 20 Speedo Gear

D0OZ-17271-B

3.73 Gear Ratio / Purple 21 Speedo Gear

Jeep Part #j3167393

4.10 Gear Ratio / White 23 Speedo Gear

Automatic Transmissions with 8 Tooth Drive Gear

1990-1998 Automatic Transmissions

Part Number

Description

C7AZ-17271-B

2.73 Gear Ratio / Gray 18 Speedo Gear

C8SZ-17271-B

3.08 Gear Ratio / Orange 20 Speedo Gear

D0OZ-17271-B

3.27 Gear Ratio / Purple 21 Speedo Gear

Jeep Part #j3167393

3.55 Gear Ratio / White 23 Speedo Gear

Jeep Part #j3167393

3.73 Gear Ratio / White 23 Speedo Gear

Jeep Part #j3167393

4.10 Gear Ratio / White 23 Speedo Gear

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