well the NA transmission was "weaker" then the standard turbo transmission.
R154
- First Gear: 3.250:1
- Second Gear: 1.955:1
- Third Gear: 1.310:1
- Fourth Gear: 1.00:1
- Fifth Gear: 0.753:1
but the NA and turbo automatic tranny the A034e are the same..
so swapping in a W58 really should of messed to much.
- First Gear: 3.285:1
- Second Gear: 1.894:1
- Third Gear: 1.275:1
- Fourth Gear: 1.00:1
- Fifth Gear: 0.783:1
- Reverse: -3.768:1
Turbos do go out on a 20 year old car.. specially if there not maintained or people push too much boost with out proper precautions.