Auto-Transmission Problems

[brennie]

I have had the transmission replaced and this problem is recurring.
After the vehicle has well and truly heated up, noises and grinding occur in low gear...one it shifts up a gear the noise goes away. It has a transmission cooler fitted but it is getting very frustrating as this will be the 3rd replacement and the same thing is happening after a period of time..also at 100ks/hr there is sometimes a surge in revs....

[vztrt]

Manual time!!

[hako]

Are you sure its not a part of the engine/trans/exhaust/diff hitting the body. This will give a grinding sound that goes away once the pedal is lifted a bit. Re surging at 100kph that could be 4th gear locking and unlocking...maybe the auto is getting wrong instructions from the ECU....speed sensor?

[RyVsAcclaim]

I'm having pretty much the same issues with my transmission, still the original trans with 175000 on it. The surging revs is wht got me stumped. I was gonna go get a good service and take it from there. Hoping its not gonna need heaps of major work...then there is always a manual conversion