Speedometer Recalibration Gears Speedometer Recalibration Gears

You'll notice that I have a Jeep part number listed for the 23 tooth gear. I have not tried this but have heard from many 'stangers that this will work and also save you a couple of bucks. All other part numbers are Ford/Lincoln/Mercury part numbers. Be aware that when the 23 white speedo gear appears in the table for the second time, it means that its the closest you can get without changing the internal drive gear (not easy).

Manual Transmissions with 6 Tooth Drive Gear

  • Not found in OEM applications

Item Number

 Description

N/A

3.08 Gear Ratio / Not possible

C0DZ-17271-A

3.27 Gear Ratio / Maroon 16 Speedo Gear

C3DZ-17271-C

3.55 Gear Ratio / White 17 Speedo Gear

C0DD-17271-B

3.73 Gear Ratio / Yellow 18 Speedo Gear

C0DZ-17271-B

3.90 Gear Ratio / Pink 19 Speedo Gear

C1DZ-17271-A

4.10 Gear Ratio / Black 20 Speedo Gear

C4OZ-17271-A

4.30 Gear Ratio / Red 21 Speedo Gear

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Manual Transmissions with 7 Tooth Drive Gear

  • 1983-1989 T-5 OEM
  • Pre 1993 T-5 Aftermarket
  • 1996-1998 Cobra T-45 OEM
  • All Tremec Transmissions

Item Number

 Description

C0DZ-17271-A

2.73 Gear Ratio / Maroon 16 Speedo Gear

C0DD-17271-B

3.08 Gear Ratio / Yellow 18 Speedo Gear

C0DZ-17271-B

3.27 Gear Ratio / Pink 19 Speedo Gear

C1DZ-17271-A

3.55 Gear Ratio / Black 20 Speedo Gear

C4OZ-17271-A

3.73 Gear Ratio / Red 21 Speedo Gear

Jeep Part #j3167393

4.10 Gear Ratio / White 23 Speedo Gear

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Manual Transmissions with 8 Tooth Drive Gear

  • 1990-1995 T-5 OEM
  • 1996-1998 T-45 OEM Except Cobra

Item Number

 Description

C0DD-17271-B

2.73 Gear Ratio / Yellow 18 Speedo Gear

C1DZ-17271-A

3.08 Gear Ratio / Black 20 Speedo Gear

C4OZ-17271-A

3.27 Gear Ratio / Red 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 (Not 100% accurate. This combination will offer the best accuracy without changing the drive gear. Change drive gear to a 6 tooth for complete accuracy. See 6 tooth table.)

Jeep Part #j3167393

4.10 Gear Ratio / White 23 Speedo Gear (Not 100% accurate. This combination will offer the best accuracy without changing the drive gear. Change drive gear to a 6 tooth for complete accuracy. See 6 tooth table.)
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Automatic Transmissions with 7 Tooth Drive Gear

  • 1983-1989 Automatic Transmissions

Item 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

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Automatic Transmissions with 8 Tooth Drive Gear

  • 1990-1998 Automatic Transmissions

Item 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 (Not 100% accurate.)

Jeep Part #j3167393

4.10 Gear Ratio / White 23 Speedo Gear (Not 100% accurate.)


Now if you really want to change the internal drive gear of your manual tranny you can match it according to the table below. Be aware that the 6 tooth will offer the most combos for numerically higher gear ratios and offer the greatest degree of accuracy. The 6 tooth gear selection table for a manual tranny is the first in the page.

Item Number

 Description

E3ZZ-17285-B

6 Tooth Internal Drive Gear / Black

E3ZZ-17285-A

7 Tooth Internal Drive Gear / Yellow

F0ZZ-17285-A

8 Tooth Internal Drive Gear / Green


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