Specifications
28
Saginaw (Car) 3 & 4 speed: Used in cars 1966 to
1982, these transmissions measure 9-5/8” long. The
1st gear of the 4 speed is 2.20:1; 2nd 1.64:1; 3rd 1.47:1,
and a 4th gear ratio of 1:1. The 3 speed has a 1st gear
ratio of 2.54:1; 2nd 1.88:1, and a 3rd gear ratio of 1:1.
These transmissions are externally shifted and will
require shifter components. This adapter kit includes a new main
shaft, a .715” adapter plate, and the necessary seals and hardware.
We do not include a sealed bearing or a index retainer in this kit. When
ordering this kit you will also need to consider a Hurst shifter, shifter
bracket, and shifter rod kit.
Saginaw 3 & 4 speed to Dana 18/20
50-1000 .715” 6 spl. adapter kit
Optional Items:
715600 Hurst shifter
716302 Sealed bearing
715506 Shifter bracket
716001 Large hole index retainer
716002 Small hole index retainer
715628 Rod kit
716003 Trans mount
T & C 4 Speed: This transmission is mainly found in cars from 1967 to 1982. The case length is 10-1/4”. The 1st gear ratio is
2.78:1; 2nd 1.92:1; 3rd 1.35:1, and a 1:1 4th gear ratio. This transmission is popular for both the early Broncos & Jeeps. The shifting
mechanism is external, so the shifter brackets and a shifter rod kit are normally required. This transmission is sometimes referred
to as a T & C or 10 bolt top cover. The adapter kit for the T&C 4sp includes a new aluminum adapter plate and main output shaft.
Also included in this kit is necessary hardware. We do not include a sealed bearing or a index retainer in this kit. When ordering
this kit you will also need to consider a Hurst shifter, shifter bracket and shifter rod kit.
T & C 4 speed to Dana 18/20 Optional Items:
50-2000 1.250” 6 spl. adapter kit 715600 Hurst shifter 716302 Sealed bearing
715506 Shifter bracket 716001 Large hole index retainer
715631 Rod kit 716002 Small hole index retainer
716003 Trans mount (or) 716017 Trans mount
T & C 4 Speed Overdrive: This transmission is used in both car and truck applications. The case length on this transmission
is 10-1/4”. The 1st gear ratio is 3.29:1; 2nd 1.84:1; 3rd 1:1, with a 20% overdrive. Ford used this transmission from 1978 to 1989.
When used in a car application, this transmission resembled the standard T & C 4 speed. The shifting mechanism is external, and
a shifter bracket and rods will be required. When used in a truck application, this transmission used a larger rear output shaft bearing
and was top shifted. This kit requires the installation of a new main output shaft. The adapter kit for the T&C 4 speed overdrive includes
a new aluminum adapter plate and main output shaft. Also included in this kit is necessary hardware. We do not include a sealed
bearing or a index retainer in this kit. When ordering this kit you will also need to consider a Hurst shifter, shifter bracket, and shifter
rod kit. The truck 4 speed does require a special rear bearing.
T & C 4 speed to Dana 18/20 Optional Items:
50-5400 1.250” 6 spl. adapter kit 715600 Hurst shifter 716302 Sealed bearing
715506 Shifter bracket 716001 Large hole index retainer
715631 Rod kit 716002 Small hole index retainer
716003 Trans mount (or) 716017 Trans mount
TRUCK-TYPE TRANSMISSION ADAPTERS:
SM420 Truck 4SP: This transmission works great in Jeeps. The overall length is 10-1/2”. It has the lowest 1st
gear available of 7.05:1; 2nd 3.57:1; 3rd 1.7:1, and a 4th gear ratio of 1:1. This transmission was used in GM trucks
from 1947 to 1968, and has a 10 spline output shaft. As the years progress, it is getting harder to find this
transmission and parts. We offer 3 adapter kits for the SM420 transmission. The first kit is 4.5” long and has a
new main shaft that must be installed into the transmission. The other two kits are designed with a spud shaft
that couples to the stock SM420 main shaft. These two kits are 4.0” long. One is for the 6 spline Dana transfer case
and the other is for the 10 spline. All the kits are supplied with the proper gaskets and bolting hardware.
SM420 to Dana 18/20 Optional Items: 716003 Trans mount
50-2400 4.5” main shaft 6 spl. adapter kit 716001 Large hole index retainer
50-2401 4.0” spud shaft 6 spl. adapter kit 716002 Small hole index retainer
50-2402 4.0” spud shaft 10 spl. adapter kit 716302 Sealed bearing
dana 18 & 20 t/c adapters (1941-79)