Well all summer my little 904 trans with a manual valve body was slow to engage and after 1 min would not move from a dead stop in any gear until about 2000 rpms. However after 3 to 5 mins trans would work great all day long. I did change the oil and filter when the problem forst started with no change.
Well now for the last few weeks it would slip in reverse when only when hot, believe that is a low band adjustment but I never pulled the pan off.
Today thou it slip in 3 gear at WOT, back off and tried again, would not hold. Can drive part throttle fine in 3 rd gear, just can not hold full power.
I think its DOA, no band adjustments or valve body work will repair it, needs a full overhaul / right