T18 4SP/CHEVY (6 SPACER) KIT

Advance Adapter

This adapter plate assembly is used to adapt a GM Engine to the Jeep T-18 / T-98 4 speed manual transmission. The adapter plate is 1.812″ in length and is manufactured from 356-T6 heat treated aluminum alloy. Included in the adapter plate kit you will receive an adapter plate, pilot bushing, gasket, seal, fastening hardware, and adapter instructions.

Compatible Engines

• Chevy/GM Small Block V8
• Chevy/GM 4.3L V6
• Buick 225 & 231 V6

Note: This adapter plate kit only fits T-18 / T-98 transmission with a input shaft stick out of 13”-14”

Note: With our adapter plates, we utilize a new front bearing retainer to obtain proper bell housing alignment. Chevy adapter plates we use a small index of 4.686”, if your bell housing utilizes the larger 5.125 index diameter you will also require P/N 716078 .

Note: This adapter plate kit works exclusively with the original Jeep T-18 / T-98 adapter housing. This adapter housing is approx 5” in length.

Transmission

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. The T-98 has a 1 1/16″ 10 spline input shaft and 1 3/8″ 6 spline output.

Bill Of Materials

• RETAINER (AA-OD) / 716046
• BUSHING- PILOT.750 TIP GM CRANK / 716168
• ADAPTER- T15 TO GM BELL HOUSING / 711509
• LOCK WASHER 1/2 PLATED ZINC / 725002
• H.H.C.S. 1/2 -13 X 1-1/2 gr. 5 / 725008
• S.H.C.S. 5/16 -18 X 1-1/4 black oxide / 723119
• 7/16 -14 X 5-1/2 LG H.H.C.S. / 724329