Jeep Automatic Transmission Guide
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
2018 Jeep Grand Cherokee Engine and Transmission
Three different engines, an eight-speed automatic transmission, and optional all-wheel drive work together to fit a variety of users’ needs. No matter the configuration, the Grand Cherokee has brawny towing capacity that kicks its usefulness up another notch.
What’s New for 2018?
The Grand Cherokee’s 3.6-liter V-6, 5.7-liter V-8, and turbocharged 3.0-liter diesel V-6 carry over to 2018 with no changes, and we expect performance to do the same.
2017 Jeep Grand Cherokee
The Grand Cherokee offers three engines. The base engine is a 3.6-liter V-6, but a 5.7-liter V-8 is optional on Limited trims and above. The V-8 engine is an expensive option, and performance isn’t augmented by a significant margin. In our testing, an all-wheel-drive Grand Cherokee with the 5.7-liter V-8 and standard eight-speed automatic ran from zero to 60 mph 0.6 second quicker than the gasoline-powered V-6.
The base V-6 pulls strongly and transmits very little vibration into the cabin, so it’s the powerplant we’d prefer. The eight-speed automatic does a good job of being in the right gear at the right time, but it’s still possible to catch it off guard with sudden, heavy throttle inputs. The gasoline V-6 is well matched to the Grand Cherokee’s heft, and it does an admirable job of motivating it around town and merging into traffic.