C-3 up to 86
A4LD 87-88
Aside from weak mainshaft the A4LD really benefits from a good Torque converter, as with most auto's.
I wouldn't take one drag racing but I think if one really wanted auto & OD for the street, you could achieve it with carefull rebuilding.
Most shops do the cheapo rebuildo, 1 year guarantee, hope we see you again when the warranty expires.
You have to know and trust someone that can do a good build up.
The money needs to go into certain parts and not their pockets.
The labour is the same