The T-18 is a heavy duty four speed with unsynchronized first gear. These transmissions were manufactured by Borg Warner and they have a cast iron case. The casting number on the drivers side of the T-18 is T-18 or 13-01. The T-18 has a 1 1/8' 10 spline input shaft and a 1 3/8' 6 spline output.

1. T18 Transmission For Sale

The Ford version of the T-18 was used approximately from 1967 until 1984. It is a heavy duty four speed manual transmission that is available in wide and close ratio. The transmission weighs close to 150 pounds.

The case and the top of the transmission are cast iron. The Ford version uses the standard Ford 'butterfly' bolt pattern and a 1 1/16' 10 spline input shaft. The input shaft is around 6 1/2' long. The input shaft is about 1/2' shorter than the Jeep T-18 input shaft. The closely related Ford T-98 typically uses a fatter input shaft. The drivers side of the case will be cast with T-18 or 13-01. If you click on the top thumbnail, you can see the 13-01 casting number in that picture.

There will normally be a PTO cover plate found on the passenger and/or drivers side. There are two shift patterns used, one where reverse is out and up and the other where reverse is out and back. The out and back is the later version.

There are generally two styles of output for the 2WD version of the Ford T-18, the long slip yoke style shown in the top picture and a short regular yoke style. The 4WD versions of the Ford T-18 tend to use long adapters and 31 spline outputs.

The T-18A version used from 1977-1979 is the best transmission ever put in a CJ by the factory since it features a granny low first gear(6:32:1.) Earlier T-18s have the same great strength, but a 4.03:1 first. The T-98 is the predecessor to the T-18 that was an option for CJs from 1955-1970. Transmission: T18 T19 Vehicle Source: use the options above to select the correct product for your conversion. Our master rebuild kit has been assembled for our customer's rebuilds as well as our own. It is the most complete kit we've seen anywhere. Having issues diagnosing problems with your T18 4 Speed manual transmission we can help. Below you will find a detailed parts list for the Ford T18 manual transmission that Ford T18 $ Speed Transmission includes complete rebuilt transmissions, bearing.

Transmission	1st	2nd	3rd	4th	5th	Rev
T-18	6.32	3.09	1.69	1.00	7.44

Main >> Transmission >> Factory >> T-18

From JeepTech and JeepTech Publishing LLC, the Jeep knowledge base.

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The T-18 is a heavy duty four speed with unsynchronized first gear. These transmissions were manufactured by Borg Warner and they have a cast iron case. The casting number on the drivers side of the T-18 is T-18 or 13-01. The T-18 has a 1 1/8' 10 spline input shaft and a 1 3/8' 6 spline output.

The T-98 has a very similar appearance to the T-18 except a casting number of T98. It is heavy duty like the T-18, but a bit more prone to wear since bearings and lubrication are not as good. Internals from a T-18 can be put in a T-98 case. The side picture above is actually a T-98 with granny T-18 guts. The T-98 has a 1 1/16' 10 spline input shaft and 1 3/8' 6 spline output.

T-18s used after 1978 have reverse down by fourth and earlier T-18s have reverse up by third. The shape of the case is also different with the '79+ cases for the different reverse configuration. On the right is a T-18 out of a '79 CJ-5. The blue T-18 in the picture above is out of a '78 CJ-5. Notice the later T-18 has a flat side rather than the bulging side of the earlier T-18. Both versions have a PTO port on the drivers side.

The T-18s used in full size Jeeps(FSJs) such as the Chorokee, Wagoneer, and J-series pickups use a transmission to bell housing adapter. Three basic variations exist with different adapters.

• Early 70s T-18s use a 1' cast iron adapter with a deep AMC bell housing. The bell housing is the same as the bell housing used with the T-15.
• Later 70s FSJs with V8 engines use a 5' aluminum adapter and a AMC T-15 bell housing. There are pictures of this version below.
• Later 70s FSJs with I6 engines use a shoter aluminum adapter and a AMC T-15 bell housing.

The different adapter means a different length input shaft is used. The input shaft size and spline count is consistent for all the Jeep T-18s, but the pilot bushing size varies. The different adapters used with the later V8 and I6 engine where presumably used to keep the drive shaft lengths consistent regardless of engine.

All Jeep T-18s come with a 1' adapter for the Dana 20 transfer case except the T-18 used in 1980 and 1981 J-20 pickups. These trucks used the NP208 transfer case and the adapter for the NP208 is around 9' long and it uses a round bolt pattern. The output shaft of this version of the T-18 is 23 spline. The Dana 20 version of the T-18 has the big hole 'Texas' bolt pattern and 6 spline output shaft.

Usage

The T-18 was optional on CJs from 1971-1979. The T-18A version used from 1977-1979 is the best transmission ever put in a CJ by the factory since it features a granny low first gear(6:32:1.) Earlier T-18s have the same great strength, but a 4.03:1 first. The T-98 is the predecessor to the T-18 that was an option for CJs from 1955-1970.

Other Jeep trucks also had the T-98 as an option from 1955-1970, the close ratio T-18 optional from 1971-1975, and the wide ratio T-18 from 1976-1979. After 1979, the wide ratio T-18 was only avilable as an option in the J-20 pickup truck from 1980-1981. This version of the T-18 has the round New Process bolt pattern and 23 spline output, but the adapter is long for a short wheel base Jeep. Earlier T-18s and T-98s used the 'Texas' bolt pattern and 6 spline output. The truck version of the T-18 uses a long input shaft compared to the T-98 or CJ T-18s.

Transmission	1st	2nd	3rd	4th	5th	Rev
T-98	6.40	3.09	1.69	1.00	N/A
T-18	4.02	2.41	1.41	1.00	4.73
T-18A	6.32	3.09	1.69	1.00	7.44

T18 Transmission For Sale

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