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Jeep Transfer Case I.D. Chart - 1941-1979 Jeep Vehicles
The Dana Spicer transfer
case, Model MB dual lever shift control, can be identified by
the small intermediate gear idler shaft that is only .750" in
diameter. This MB transfer case is marginal for V8 power, so we
suggest that you limit your engine size to a V6 or change the
transfer case to the later model Dana 18. This transfer case
uses an input gear with 1-3/8" 6 spline.
These vehicles were equipped
with the Dana Spicer Model 18 and 20. These transfer cases have
a four position shifter that provides two gear ratios in 4WD,
one ratio in 2WD, and a neutral position. Four wheel drive low
provides a reduction ratio of 2.03:1 on the Dana 20, and a
2.46:1 on the Dana 18. The controls varied from a dual lever
design to a single lever on the later models. The bolt pattern
on the input side has always remained the same, so transfer
cases can be interchanged between years - with some exceptions.
These exceptions include: the indexing or alignment bearing
retainer that protrudes from the back side of the transmission.
Another difference is that the Model 20 transfer cases have the
power to the rear axle directly in line with the transmission,
while the Dana 18 has the power offset to the passenger side.
Dana Spicer 18 & 20
6 Spline Transfer Cases
On all Jeep vehicles 1941-79,
equipped with the Dana Spicer 6 spline transfer case, you will
have the largest selection available for transfer case adapters.
These adapters are for replacement of Jeep transmissions that
have a 6 spline input gear to the transfer case. The Jeep
transmission model numbers are T84, T90, T86, T85, T89, T98A,
T18, T15, and T150. Not all of the transmission options are
compatible for use with short wheel base vehicles.
Dana Spicer 18 & 20
10 Spline Transfer Cases
On all Jeep vehicles 1969-71,
some were equipped with the Dana Spicer 10 spline transfer case.
Dana Spicer 20
15 Spline Transfer Cases
On all Jeep vehicles that
were equipped with the AMC TH400 automatic transmission, you
will find that they used a special input gear to the transfer
case that was held in place with a snap ring and splined to a
special coupler shaft with 15 teeth.
Borg Warner Quadra-Trac
This is a chain-driven
transfer case used with the AMC Turbo 400 automatic
transmission. The Turbo 400 has a 10 spline super-long output
shaft that simply slides into the input gear of the transfer
information is provided for informational purposes only.