Specifications
of the original transmission for installation into the new adapter. The original T90 or T86 bearing must be reinstalled back into
this retainer for use with the new transmission. An optional sealed bearing, P/N 716302, or a non-sealed replacement bearing,
P/N 716312, can be used.
When replacing a Jeep T14, T15, T18, T150 or T98 transmission, you will need to purchase a new bearing retainer, P/N 716001,
or Jeep No. 928477. This retainer is so critical to your installation that, if it is left out, you will have severe damage
to both your transmission and transfer case.
This retainer must be installed in the backside of our new adapter and then have
a 307 roller bearing installed inside the retainer. The bearing must be retained inside the retainer with a large snap ring. The snap
ring is furnished with the new retainer. The illustration on Page 22 shows this assembly. There are a few exceptions as to alignment
with the T18 and T98 transmissions.
Transfer Case Input Gears: In the Dana 18 and Dana 20 transfer cases, we have seen three different spline sizes and three
different tooth counts on the input gears. We have designed most of our kits so that they can be interchanged and furnished with
a new shaft having the correct drive spline to match the transmission that is being replaced. This is very helpful since it will eliminate
the expense and time necessary to change input gears. There are a few exceptions that will require the purchase of a new input
gear. Be sure that the new gear is compatible with your transfer case. There are some cases where Dana has manufactured two
26 tooth gears that appear to be identical, but have a slightly different tooth pitch.
The transfer case input gear is positioned from the bearing that is installed into the rear bearing retainer. If your original transmission
has a spacer or bushing between the rear bearing and drive gear, then you will be required to eliminate this original spacer bushing.
In order to prevent any error in the installation of your gear, we suggest that you make sure that the gear splines are dead-even with
the end of our shaft splines with only the threads for the nut showing.
Output Nut 7/8"-16 Nylock: Each adapter kit includes a new nylon lock nut for your conversion. These nuts are standard Jeep
items that are used on most Jeep transmissions (Jeep P/N 8126806). They do not require a cotter pin to lock the nut in position.
The nut must be replaced every time it is removed from the shaft. Nuts that are reused could possibly loosen and cause transmission
or transfer case damage. These nuts must be used with the original flat washers. The nut must be torqued to a maximum of 75
ft./lbs. in order to prevent bearing pre-load. This same torque specification must be maintained with the Warn, Husky, and Saturn
overdrives.
When considering an aftermarket transmission, it is important to determine what type of transmission you will require for your driving
habits. The three transmission types listed on Page 6 will help you to determine the type of transmission best suited for your particular
style of driving.
CAR-TYPE TRANSMISSION ADAPTERS:
Muncie (Car) 4 speed (M21/M22): Used in cars 1964 to 1974, this aluminum case transmission measures 10-1/2” long. The
1st gear ratio is 2.20:1; 2nd 1.64:1; 3rd 1.27:1, and a 4th gear ratio of 1:1. This is an externally shifted transmission and any adapters
using this transmission will require shifter components. We offer an adapter kit that includes a new main shaft, a 4.5” aluminum
housing, 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. We also offer new transmissions with the
adapter kit installed. Call for pricing.
Muncie M21/M22 to Dana 18/20 Optional Items:
50-0100 4.5” 6 spl. adapter kit 715600 Hurst shifter 716302 Sealed bearing
715501 Shifter bracket 716001 Large hole index retainer
715625 Rod kit male studs 716002 Small hole index retainer
715626 Rod kit female studs 716003 Trans mount
Borg Warner Super T10: This transmission was produced in 4 different versions There was a Borg Warner T10, a Super T10
(thin hub), a Super T10 (thick hub), and a Super T10 (2nd design). We only offer kits for the Super T10 thin hub, thick hub & 2nd design.
Before you purchase an adapter, you should identify which transmission you have. The case length is 10” long and the most common
gear ratio is 2.64:1 1st ; 2nd 1.75:1; 3rd 1.33:1; and 4th of a 1:1. This transmission is side-shifted and will require a shift bracket
and shift rods. We offer an adapter kit that includes a new main shaft and a 5.75” aluminum housing, 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.
B/W T10 to Dana 18/20 Optional Items:
50-0702 5.75” 6 spl. Super T10 kit 716001 Large hole index retainer
50-0802 5.75” 6 spl. Super T10 kit 716002 Small hole index retainer
50-0902 5.75” 6 spl. Super T10 kit 715627-NS Rod kit T10 716302 Sealed bearing
715502-NS Shifter bracket 715600 Hurst shifter
716003 Trans mount (or) 716017 Trans mount
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dana 18 & 20 t/c adapters (1941-79)