Specifications

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SM465 Truck 4SP: Used from 1968 to 1988, this transmission replaced the SM420. It has an overall
length of 12”. The 1st gear ratio is 6.58:1; 2nd 3.58:1; 3rd 1.57:1, and 4th gear ratio of 1:1. This
transmission was used in both the 2WD & 4WD vehicles. Throughout its 20 years, the transmission
case never changed; however, we have seen three different output shafts. The 1968-79 4WD
transmission used a 10 spline output shaft, which is easily adapted to. The 1968-88 2WD version used
a 35 spline output shaft. This transmission can also be used, but not without output shaft modifications.
The 1980-91 4WD tranny used a long 32 spline output shaft. We offer two types of kits to fit these transmission.
Our newest kit is a new main shaft kit that fits all the transmission versions listed above. This kit is .875” long and is only available
in a 6 spline option. We also offer a spud shaft style kit. This kit retains the stock transmission output shaft, but only works with
the 10 & 35 spline SM465 transmissions. This kit is 4.63” long. Both adapters are supplied with the proper gaskets and bolting
hardware. The 10 spline spud shaft kit is offered to fit either the 6 or 10 splined Dana 18/20 transfer cases, and the 35 spline SM465
kit is offered for only the 6 spline Dana transfer case.
SM465 to Dana 18/20
50-4701 4.625” 10 spl. x 10 spl. adapter kit
50-4702 4.625” 10 spl. x 6 spl. adapter kit
50-4703 .875” new output shaft kit x 6 spl. (Crossmember mount included)
50-4801 4.625” 35 spl. x 6 spl. adapter kit
Optional Items:
716003 Trans mount 716002 Small hole index retainer
716001 Large hole index retainer 716302 Sealed bearing
T18 Truck 4SP: This transmission, found in 1965
to 1985 Ford pickups, is identified by a case
length of 11.875”. The 1st gear ratio is 6.32:1;
2nd 3.09:1; 3rd 1.69:1, and a 1:1 4th gear ratio.
The adapters we manufacture for this transmis-
sion come with a new main shaft. This will
usually allow the overall length of this transmission to remain ideal
for most short wheel base vehicles. Ford was not the only manufac-
turer who used the T18 transmission. When searching for a T18 in
salvage yards, make sure the bellhousing bolt pattern has a dimension
of approximately 8-1/2” across the top, and 6-1/4” top-to-bottom. The
input shaft stickout should be approximately 6-1/2”. It is easier to adapt
to the Ford T18 than to the Jeep or Scout T18. We do, however, also offer
adapters for the Jeep & Scout transmissions. These kits are all a main shaft style kit. The top end of the transmission must be
rebuilt with the new main shaft included in the kit. All of the kits include a new 1” thick adapter plate that couples the transmission
to the Dana 18/20 transfer case. The transmission bolt patterns between the Ford and Jeep transmission cases are different, so
we do offer a few different kits for that reason. These adapter kits also have the indexing hub to the transfer case as part of the adapter
plate, so an index retainer is not needed. This transmission is also very popular for use as a transmission retrofit when retaining
the stock Jeep engine. For more information, see the 1941-79 Transmission Retrofit section of this manual.
Ford T18 to Dana 18/20 Jeep T18 to Dana 18/20
50-7201 1” 6 spl. large index adapter 50-8705 1” 6 spl. large index adapter
50-7202 1” 6 spl. small index adapter 50-8706 1” 6 spl. small index adapter
Optional Items:
716003 Trans mount or stock Jeep T18 mount
T98 Truck 4SP: This transmission, found in 1960 to 1971 Ford pickups & Jeeps, is identified by a case length of 11.875”. The
1st gear ratio is 6.39:1; 2nd 3.09:1; 3rd 1.68:1, and a 1:1 4th gear ratio. The adapters we manufacture for this transmission come
with a new main shaft. This will usually allow the overall length of this transmission to remain ideal for most short wheel base vehicles.
Ford was not the only manufacturer who used the T98 transmission. When searching for a T98 in salvage yards, make sure the
bellhousing bolt pattern has a dimension of approximately 8-1/2” across the top, and 6-1/4” top-to-bottom. The input shaft stickout
should be approximately 6-1/2”. It is easier to adapt to the Ford T98 than to the Jeep or Scout T98. These kits are a main shaft style
kit. All the adapters include a new 1” thick adapter plate that couples the transmission to the Dana 18/20 transfer case. These adapter
kits also have the indexing hub to the transfer case as part of the adapter plate, so an index retain is not needed.
Ford & Jeep T98 to Dana 18/20 Optional Items:
50-8703 1” 6 spl. large index adapter 716003 Trans mount or stock Jeep T18 mount
50-8704 1” 6 spl. small index adapter
dana 18 & 20 t/c adapters (1941-79)