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by Terry L. Howe

These articles were originally written to cover only transmissions used in CJs, YJs, TJs, and their military brethren. It is being expanded to cover all Jeep models.

45RFE: The 45RFE four speed automatic transmission was used in 1999 Jeep Grand Cherokees with 4.7L engines.
46RE: The 46RE four speed automatic transmission was used in 1998 Jeep Grand Cherokees with 5.9L engines.
44RE: The 44RE four speed automatic transmission was used in 1996 to 1998 Jeep Grand Cherokee's with 5.2L engines.
42RE: The 42RE four speed automatic transmission was used in 1993.3 to 1998 Jeep Grand Cherokees with 4.0L engines.
46RH: The 46RH four speed automatic transmission was used in 1993 to 1995 Jeep Grand Cherokees with 5.2L engines.
32RH: The 32RH three speed automatic transmission was used in 1992 to 1995 Wrangler with 4.0L engine and it continues to be used in 1997+ Wrangler with 4.0L engine.
30RH: The 30RH three speed automatic transmission was used in 1992 to 1995 Wrangler & 1992 to 1996 Cherokee with 2.5L engine.
AW4: The AW4 four speed automatic transmission was used in 1987 to 1990 Jeep Cherokee (XJ), & Jeep Comanche with 2.5L & 4.0L engines. The AW4 was also used in 1991 through 1992 Jeep Comanche & 1991 through 1998 Jeep Cherokee & 1993 through 1993.5 Jeep Grand Cherokee with 4.0L engines.
AX-15 AX-15: The AX-15 is a medium duty 5 speed manual transmission. It was introduced in mid 1989 in YJs with the 4.2L engine and XJs and MJs with this engine. The first year of the Grand Cherokee (ZJ), the AX-15 was rare option only with the 4.0L engine. The AX-15 is still used in TJs and XJs with the 4.0L engine.
AX-5 AX-5: The AX-5 is a light duty 5 speed manual transmission. it and the BA 10/5 were used in all Wranglers from 1987-mid 1989. It was also used in Cherokees (XJ) and Comanches (MJ) with the 2.8L V6, 2.5L I4, and 4.0L I6 from their introduction until 1989. After mid 1989, the AX-5 has only been used in 4 cylinder Wranglers (YJs and TJs), Cherokees (XJ), and Comanches (MJ).
BA 10/5 BA 10/5: The BA 10/5 is a light duty 5 speed manual transmission. It and the Aisin AX-5 were used in all Wranglers from 1987-mid 1989. It was also used in Cherokees (XJ) and Comanches (MJ) with the 2.8L V6, 2.5L I4, and 4.0L I6 from their introduction until 1989.
T-5 T-5: The T-5 is a light duty 5 speed transmission used in CJs from 1982 until 1986.
TF727 Automatic TF 727: The TF 727 is a heavy duty 3 speed automatic used in full sized Jeeps (SJs and J series pickups) from 1980-1983. From 1984-1992 the 727 was only used in these trucks with the AMC 360 V8.
999 side 999: The 999 is 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 in 1991 with the 2.5L engine.
904 Automatic 904, 909: The 904 and 909 are 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. The 909 is a 904 with a lock-up torque converter.
SR-4 SR-4, T-4: The SR-4 and T-4 are light duty four speed manual transmissions used in CJs from 1980 until 1986.
T-176 T-176, T-177, T-178: The T-176, T-177, and T-178 are a medium duty four speed manual transmission used in Jeep CJs, SJs, and J pickups from 1980-1986.
T-150 T-150: The T-150 is the 3 speed manual transmission that was used in CJs from 1976 to 1979.
Jeep T-18 T-18: The T-18 is a heavy duty four speed used in Jeeps from 1971 until 1981. It was only used in the CJ from 1971-1979.
T-15 T-15: The T-15 was used only in V8 equipped CJs and Jeep trucks from 1972 to 1975.
TH400 side TH400: The TH 400 is a heavy duty three speed automatic that was used in CJs with the BW 13-39 transfer case from 1976-1979. The TH 400 was also used in full sized Jeeps (SJs and J series pickups) from the late 60s until 1979.
T-14 T-14: The T-14 is a three speed transmission used with the "Dauntless" Buick V6 and AMC I6 from 1967 to 1975.
T-86 T-86: The T-86 is one of the three speeds used with the many CJs and Jeepster Commandos with the "Dauntless" Buick V6.
T-90 T-90: The T-90 was the standard three speed for CJ and their military counterparts built from 1945 until 1971. It was also the standar transmission for Willys Wagons, Willys Pickups, FC trucks, and Jeepster/Commandos during this time period.
T-84 T-84: The T-84 is a light duty three speed used in MBs and GPWs during WWII.

Contributors

Thanks to Rick Boiros and Joseph Heinrich for some of the information that got this article rolling a long-long time ago. Thanks to Daniel Regan for the T-90 and T-14 pictures. Thanks to David Moulton for the most excellent BA 10/5 pictures and Joseph Heinrich for his most excellent pink T-18 pictures. Thanks to Russ Wylie for some of the T-86 information. Thanks to Kirk Beasley for looking up several of these gear ratios in his library of technical service manuals. Thanks to Dennis Williamson for the model numbers for the newer transmissions. Thanks to Tom Hackle of FN Jeep for allowing me to take pictures of the 999 and Turbo 400.

Last modified Wednesday, 01-Dec-2010 09:17:34 MST


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Tom (3/16/2013)
Hi ok so i want something like a 95 cherokee and the missus wants a wrangler easy enough...she wants auto and i want manual was wondering if it would be fairly easy to swap gearboxes if we get the opposite to what we want as i know these configurations are easier to come..any help would be appreciated

shawn bell (2/9/2013)
i want to convert my 97 zj from auto to standard just wondering what i will need for parts to do the job as i have never done a jeep transmission swap

Phil (12/22/2012)
Is it possible to use a two wheel drive BA10 transmission to replace a 4 wheel drive BA10 transmission by changing out the rear end? The two wheel drive transmission is from a 1987 Jeep Comanche and the 4 wheel drive transmission is from a 1988 Jeep Comanche. If it can, what needs to be changed? Thanks

steve (5/17/2011)
how do I know if my 1993 jeep greand cherokee with a 4.0 has b\has a 44re oe aw4


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