This is for those out there that “do it themselves”, and it should save you some money.

Venders ( Call these companies to order your parts. I all ready have figured out which is the cheapest. Order the following parts from each company, part numbers are in parentheses().. )
Parts List
1. Blumenthals (405)-232-9557
A. Viper Output Seal (16725) $7.41
B. Viper Tail Housing Bushing (BM29) $10.00

C. Main Shaft Bearing, front ( SET16) $12.39
D. Viper Speedo reluctor 10T (1386-110-003) 8.73
E. 30 Spline Spicer Yoke (short yoke/ 3-3-3931X) 61.28
F. U-Joint Viper to F-body Driveshaft (2-1153) 22.43


2. The Gear Box (734)-793-0727
A. Viper 30 Spline Main Shaft 270.00


3. D&D Performance (248)-735-6220
A. Viper Snap ring Kit 15.00


4. GM Dealership
A. GM Trany Silicone (97720043) 25.00


Parts Total = $432.24




Now for the Machine work. I had a hard time finding a place that had the machines to do the work.
I paid $140.00 for the machine work.

Refer to the pictures for help.

Machine Work
1. Remove tail housing from t-56
2. Take seal and bushing out of the old tail housing.

(Seal already out, stock bushing still in)

(Seal and bushing out, Notice the valley in the housing)

3. Notice the seal , and the stock “shorter” bushing.

The Machine shop will have to bore the tail housing out for the larger Viper bushing and , Viper seal. Also notice the small hole in the bushing, the viper bushing hole must line up the same. Other wise you won’t be able to add trany fluid when you are done.



4. Take the tail housing to the machine shop and have it machined to the following specs.
Seal machine for a .003” press fit
Bushing machine for a .003-.004” press fit ( .005” is kind of tight to press in, I recommend a little less)
Have the viper main shaft machined down 1” ( I did ¾” but 1” would be better), Note- You can cut the shaft with a chop saw , BUT if the threads are buggered it will be hard to slip on the new speedo reluctor gear. It may not slip on at all. I recommend Machining it, but a chop saw is cheaper.


5. After machine work is complete, take a dremmel, and notch out a bigger valley in the tail housing. You will notice there was one there Before machine work, but after there will not. So you have to make a valley to the trany fluid will flow into the trany from the shifter hole.


6. Install Viper bushing, keeping note of the trany filling hole, and the new valley in the tail housing. The new bushing is longer than the stock, go a head and install the new bushing all the way down, till it is flush.


7. Install Viper Seal.


8. Tail housing work is complete.

 

Install
9. Take apart t-56 completely
10. Reinstall all parts back on new Viper t-56 main shaft, Install new baring at this point.
11. Install new 10T Speedo reluctor gear, and the needed two snap rings.The stock t-56 shaft is smaller, thus the stock t-56 snap rings are smaller than the Viper. NOTE- stock is 17T you will have to have a retune on your pcm and have it change from 17T to 10T.

You could call D&D and order a 17T converted to a 30 spline shaft but it would raise the cost of the swap. And since most of the cars doing the swap will already have there cars tuned, it will not be much to have it retuned.

Total Cost =$572.24

That’s a lot cheaper than 900.00 and a 250.00 for a tail housing core deposit.


Good Luck to all pm for more pic's or help.