Originally Posted By: jrustles
Originally Posted By: mister_two
By rough shifting, let's say from a complete stop, I give it gas to go it wouldn't shift at its normal shift points, say between 2 and 3k rpm, rpm continue to climb beyond 3k and when it DOES upshift it bangs in, hope I am describing it correctly. Same from 2 to 3 and it gets better after that, smoother.
If I am cruising at highway speeds and then slow down to say 10 mph and then speed up again it would not do it smoothly, that same bang feeling. Also, coming to a full stop, it "clunks". Also moving the shift lever between D4 and R would feel clunky also.
Sounds like low line pressure. This correlates with the fluid losing even more visc.when the transmission gets hot. Mechanically, could be a pump problem, or line pressure is leaking internally. It could just be increased clearances from wear and tear. Higher viscosity recommended, with FM to further smooth shifts.
+1. I would add there may also be some internal leakage.
I hate even go in this direction but i think in this particular case its worth a shot or a hail Mary pass if you will.
I would try a BG product transmission set, the flush and the conditioner pack common on ebay.
Run the flush as directed then do a line off total fluid exchange with Amsoil ATF.
Add the BG additive and drive the car gently for a couple of hundred miles.
http://www.ebay.com/itm/Transmission-Flu...tr#ht_387wt_958