92 Toyota Corolla DX automatic transmission slipping/no shift
I have a 92 Toyota Corolla DX, 1.6Ltr transaxle with 3 speed automatic transmission.
There is an intermittent problem with the transmission that does not happen all the time. It usually happens at about 45MPH going up a slight hill or a steeper hill it shifts from 3rd to 2nd as it should, but instead of going into 2nd the transmission slips and transmits no power as if it was in neutral. When this happens the only thing I can do is slow down an manually shift to 1st, then the only gear that works is 1st, if I manually shift to 2nd or drive it just slips like it's in neutral. If I stop the car and put it in park then the transmission usually works properly again.
The transmission fluid looked good and was at the correct level.
I have had the car in the shop for transmission flush, but the problem remains.
Can anyone tell me what the problem is??