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Jeep Automatic Transmission Guide

A summary of the automatic transmissions used in various Jeep vehicles.
42RLE: Four-speed automatic transmission was available from 2003 to 2006 Jeep TJ Wrangler with 4.0L engines. Gear Ratios: 1st Gear: 2.84:1, 2nd Gear: 1.57:1, 3rd Gear: 1.00:1, 4th Gear: .69:1

45RFE: A four speed automatic transmission was used in 1999 Jeep Grand Cherokees with 4.7L engines. Gear Ratios: 1st Gear: 3.00:1, 2nd Gear: 1.67:1, 3rd Gear: 1.00:1, 4th Gear: .75:1, Reverse Gear: 3.00:1

46RE: A four speed automatic transmission was used in 1998 Jeep Grand Cherokees with 5.9L engines. Gear Ratios: 1st Gear: 2.45:1, 2nd Gear: 1.45:1, 3rd Gear: 1.00:1, 4th Gear: .69:1, Reverse Gear: 2.20:1

44RE: A four speed automatic transmission was used in 1996 to 1998 Jeep Grand Cherokee's with 5.2L engines. Gear Ratios: 1st Gear: 2.74:1, 2nd Gear: 1.54:1, 3rd Gear: 1.00:1, 4th Gear: .69:1, Reverse Gear: 2.20:1

42RE: A four speed automatic transmission was used in 1993.3 to 1998 Jeep Grand Cherokees with 4.0L engines. Gear Ratios: 1st Gear: 2.74:1, 2nd Gear: 1.54:1, 3rd Gear: 1.00:1, 4th Gear: .69:1, Reverse Gear: 2.20:1

46RH: A four speed automatic transmission was used in 1993 to 1995 Jeep Grand Cherokees with 5.2L engines. Gear Ratios: 1st Gear: 2.45:1, 2nd Gear: 1.45:1, 3rd Gear: 1.00:1, 4th Gear: .69:1, Reverse Gear: 2.20:1

32RH: A three speed automatic transmission was used in 1992 to 1995 Wrangler with 4.0L engine and it continues to be used in 1997-2002 Wrangler with 4.0L engine. Gear Ratios: 1st Gear: 2.74:1, 2nd Gear: 1.54:1, 3rd Gear: 1:1, Reverse Gear: 2.03:1

30RH: A three speed automatic transmission was used in 1992 to 1995 Wrangler & 1992 to 1996 Cherokee with 2.5L engine. Gear Ratios: 1st Gear: 2.74:1, 2nd Gear: 1.54:1, 3rd Gear: 1.00:1, Reverse Gear: 2.03:1

AW4: A four speed automatic transmission was used in 1987 to 2001 Jeep Cherokee (XJ), & Jeep Comanche with 2.5L & 4.0L engines. It was also used in 1987 through 1992 Jeep Comanche  & 1993 through 1993.5 Jeep Grand Cherokee with 4.0L engines. Gear Ratios: 1st Gear: 2.80:1, 2nd Gear: 1.53:1, 3rd Gear: 1.00:1, 4th Gear: 0.75:1, Reverse Gear: 2.03:1

TF727: A heavy duty 3 speed automatic used in full sized Jeeps (SJs and J series pickups) from 1980-1983. From 1984-1992 it was only used in these trucks with the AMC 360 V8. Gear Ratios: 1st Gear: 2.45:1, 2nd Gear: 1.45:1, 3rd Gear: 1.00:1, Reverse Gear: 2.00:1

999: A medium duty 3 speed automatic used in CJs from 1980-1986. It was also used in 1984-1990 SJs and J pickups with the 4.2L engine, in the YJ from 1987-1991 with the 2.5L and 4.2L engine, and in the XJ and MJ through 1986. Gear Ratios: 1st Gear: 2.74:1, 2nd Gear: 1.54:1, 3rd Gear: 1.00:1, Reverse Gear: 2.03:1

904: A light duty 3 speed automatic used in CJs from 1980-1986 only with the I4 engine. It was also used during this time period with XJs and MJs with the I4 and V6 engine. Gear Ratios: 1st Gear: 2.74:1, 2nd Gear: 1.54:1, 3rd Gear: 1.00:1, Reverse Gear: 2.03:1

909: The 909 is a 904 transmission with a lock-up torque converter. Gear Ratios: 1st Gear: 2.74:1, 2nd Gear: 1.54:1, 3rd Gear: 1.00:1, Reverse Gear: 2.03:1

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Jeep Vehicle Information