I want to give thanks in advance to the poster. I have saved a ton of cash working on my own 525 for years. Now to the new problem..

A couple of weeks ago I was out of town and my son was driving the 525 around and said it was acting funny. When I got home the transmission had gone from strong to limp in just 2 days of short driving. All I can tell you is it is acting just like a slipping clutch in a 5 speed, But its a automatic?

I read up from some previous posters and I changed the filter and fluid. There wasn't many particles in the pan at all, but the fluid was nasty brown but not burnt. I do not know a ton about transmissions but the next thing I would guess is the Torque converter is bad. The only thing that makes me leary of that is the fact I can drive about 30 mph in reverse with plenty of torque. In drive It will only creep along at idle. When I accelerate at all is when it does nothing. It progressed this far within a day or two and slight slippage at full acceleration to total slipping above idle.

Any advice would be helpfull. I have already been searching for a used tranny but I would think 134k on this one is a bit premature.