Originally Posted by 928saregreat

If no previous maintenance record on the automatic is known and the fluid is burnt smelling and discolored I would never recommend using a T-Tech "flush" machine on the transmission. Since these cars we're so fond of were built before this technology existed (with the exception of the GTS perhaps) just do the recommended service, drop the pan, clean it, change the gasket/filter, replace the fluid in the pan ONLY. I've seen many old transmissions "shocked" into slippage by the cleaning power of 100% fresh transmission fluid. This is no myth. I see it everyday! If you don't know the history, DON'T FLUSH IT. Just by doing the recommended maintenance you're gonna get a pretty good idea of the condition by the amount of metal hanging off the magnets in the pan.

Mark

Originally Posted by Randy V

Here's that engine Dr. Bob speaks of - I can see why a transmission in a similar state would not benefit from a fluid change.