Callaway rear axles
The word is that all converted automatic transmissions (700R to Turbo 400) retained the Dana 36 setup. I agree with you Clint about long term reliability. To prove this out, 5 of the original 7 cars that were converted evently had some sort of failures. Reason was "heavy foot"! As to how many rear axle failures directly, I do not think anyone knows for sure. The two original conversion that did not fail were not driven at all. They the 40th Anniversary cars owned by one individual. At this time the car have been sold and status for the most part is unknown.
There were conversions done after the 1988 production year. These cars and their numbers is unknown according to Callaway personnel. I know of two 1987 cars and two 1990 cars.
Market values on cars with the automatics have a deductible dollar amount when a trade and purchase is done by a knowledgeable dealer. Somewhere between $2,000 to $4,000.
Personally, the automatic will produce faster accelerating times with the stock Callaway cars. Unfortuntely, they do not hold up under this kind of stress. They can be built to handle it but it will take big bucks especially the after-market Callaways.
Stan
I am resourceful 
