Specifications
34
identifying the stock transmission (1941-79)
T90 (1946-72) - This 3 speed transmission has a case length of 8.000”. T90 will normally be stamped on the case. This
(Jeep & Scout) transmission was used in various models of Jeep military vehicles, Universal Jeeps, utility trucks, and
Scouts (1961-73). It was used with both the 4 & 6 cylinder applications. The gear shift control can either
be mounted to the top of the transmission case with 6 bolts or, on utility wagons, the shifter linkage extends
through the driver's side of the case for use with a column shifter.
Between the years of 1946-1972, Warner Gear made several variations in the design of the input shaft in
relation to the length and tooth count. When adapting this transmission to a V6 or V8 engine, it is critical
that your transmission be equipped with the correct length of input shaft. The only vehicles that would have
the correct input shaft length would be the utility wagons and pickups equipped with 6 cylinder engines.
The stickout length of this input shaft from the face of the transmission should be 9 to 9-1/2". If your
transmission has a shorter shaft, you will need to change input shaft. The correct input shaft has a clutch
size of 1-1/8” 10 spline (same as the Chevy clutch disc).
Chevy Engine to T90 Ford Engine to T90 Buick V6 Engine to T90
712502 Adapter Plate 712505 Adapter Plate 712502 Adapter Plate
713001 Motor Mounts 713002 Motor Mounts 713011 Motor Mounts
Optional Items:
716014 Input Shaft 716014 Input Shaft 716014 Input Shaft
716640 Clutch Linkage 716640 Clutch Linkage 716640 Clutch Linkage
716176 GM Release Arm CF360030 10” Pressure Plate 712581 Buick Bellhousing
CF360056 10-1/2” P.P. 383303 10” Clutch Disc CF360056 10-1/2” P.P.
383271 10-1/2 Clutch Disc CF260000 11” P.P. 383271 10-1/2” Clutch Disc
CF165552 11” P.P. CF360049 11” P.P. CF700010 Flywheel (231 V6)
383735 11” Clutch Disc 383735 11” Clutch Disc N1430 Release Bearing
N1430 Release Bearing 716311 Release Bearing
(Headers and Steering conversions are available for all of these applications)
If your T90 was originally fitted to a 4 cylinder, you will be required to purchase a 6 cylinder style input shaft, P/N 716014 (Jeep
#906203). This shaft has a gear tooth count of 18 teeth. On some Jeep (and Scout) vehicles, the input shaft that you are replacing
may be 16 tooth. This special tooth count is normally found only in a vehicle that has a 4:27 axle ratio. On these applications, you
will also need to purchase a new cluster gear, P/N 716018. Below we have listed the years and gear data that will be necessary
to determine your vehicle requirements. The best way to determine what your vehicle is equipped with is to simply remove the top
cover and count the teeth on the front input shaft.
O.A.L Tooth Jeep Warner
Year of Input Shaft Count Number Number
*1946-49 (T90) 9" S30-R16T 643246 T90E-16
1946-64 (T90A) 11-1/2" S30-R18T 906203 T90J-16
*1961-70 (T90) 9" S30-R16T 643246 T90E-16
1946-72 (T90A) 9-1/16" S30-R18T 640428 T90A-16
*1962-72 (T90) 9-1/8" S30-R16T 936448 T90L-16
Note: Items above marked with an asterisk “*” will require both a cluster gear
& input shaft replacement
The next section covers both the T98 & T18 transmissions. Since these two gear boxes are almost identical, we have grouped and
listed the conversion components together.
T98A (1955-73) - This 4 speed transmission can be identified by a case length of 11.875”, and a casting number of T98. The
shift cover is mounted on the top of the case with 6 bolts. This is an excellent transmission to mate to any
V8. For the necessary adapter, you will need to determine your front input shaft stickout length. There are
several various lengths and it is critical that you determine this measurement prior to ordering the necessary
components for your vehicle.
O.A.L Tooth Jeep Warner
Year of Input Shaft Count Number Number
1965-73 (T98A) 4 Cyl. 10-3/8” S27-L17T 912361 T98-16M
1965-72 (T98A) 230 12-7/8" S27-L17T 916341 T98A-16Q
1957-64 (T98A) 262 12-7/8" S27-L17T 916341 T98A-16Q
1955-64 (T98A) 4 Cyl. 10-3/8" S27-L17T 912361 T98A-16M