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.
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45RFE: The
45RFE four speed automatic transmission was used in 1999 Jeep Grand
Cherokees with 4.7L engines.
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46RE: The
46RE four speed automatic transmission was used in 1998 Jeep Grand
Cherokees with 5.9L engines.
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44RE: The
44RE four speed automatic transmission was used in 1996 to 1998
Jeep Grand Cherokee's with 5.2L engines.
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42RE: The
42RE four speed automatic transmission was used in 1993.3 to
1998 Jeep Grand Cherokees with 4.0L engines.
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46RH: The
46RH four speed automatic transmission was used in 1993 to 1995 Jeep
Grand Cherokees with 5.2L engines.
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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.
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30RH: The
30RH three speed automatic transmission was used in 1992 to 1995 Wrangler
& 1992 to 1996 Cherokee with 2.5L engine.
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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.
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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.
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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).
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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.
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T-5: The T-5 is a light
duty 5 speed transmission used in CJs from 1982 until 1986.
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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.
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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.
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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.
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SR-4, T-4: The SR-4 and T-4
are light duty four speed manual transmissions used in CJs from 1980
until 1986.
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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.
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T-150: The T-150 is the
3 speed manual transmission that was used in CJs from 1976 to 1979.
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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.
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T-15: The T-15 was used only
in V8 equipped CJs and Jeep trucks from 1972 to 1975.
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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.
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T-14: The T-14 is a three
speed transmission used with the "Dauntless" Buick V6 and AMC I6
from 1967 to 1975.
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T-86: The T-86 is one of the
three speeds used with the many CJs and Jeepster Commandos with the
"Dauntless" Buick V6.
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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.
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T-84: The T-84 is a light
duty three speed used in MBs and GPWs during WWII.
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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.
