REARS AND GEARS

The following tables contains information on suggested transmission speedometer gears for different rear end gear ratios and internal transmission speedo gears. The tables should only be used a a reference as tire diameter will effect the final drive reading.

Rear Gear ratio Factory Axle Code
2:73:1 Ratio 8M
3.08:1 Ratio YZ
3.27:1 Ratio 5E
3.55:1 Ratio 2K
3.73:1 Ratio 6W
4.10:1 Ratio N/A

 

Internal Drive Gears

 Part 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
Note: The 6 tooth will offer the most combos for numerically higher gear ratios and the greatest degree of accuracy.

Manual Transmissions with 6 Tooth Drive Gear

  • Not found in OEM applications
Part 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
C1DZ-17271-A 4.10 Gear Ratio / Black 20 Speedo Gear
C4OZ-17271-A 4.30 Gear Ratio / Red 21 Speedo Gear

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
Part 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

Manual Transmissions with 8 Tooth Drive Gear

  • 1990-1995 T-5 OEM
  • 1996-1998 T-45 OEM Except Cobra
Part 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
Jeep Part #j3167393 4.10 Gear Ratio / White 23 Speedo Gear

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