Hi Kenny, thanks for the reply.
However, I do not think that is the cause.
When this problem started up a few years ago and some 10,000 miles ago, I had the oil changed out.
It still looks clean, that pink color of ATF and smells the same as out of the bottle.
The attached photo is a few drops on white paper.
I do not understand what is a "cut seal" in your reply. Are you talking about a shaft seal that is broken and leaks oil? If so where?
I had the car into a gearbox specialist some time back and they plugged the diagnostic instrument in to see what was on the memory as defect code but it came out clear. Presumably the electrics will store the defect code so that after a time it would have still been there.
I thought of the brake band not clamping to effect the change, but then why only sometimes?
In a sense its like a slipping clutch like maybe the torque converter is empty.
Or the oil is all froth and the pump is just pumping air and not oil, or not enough oil.
Are there not sensors or solenoids that are perhaps become defective when hot and do not function to change gears?
When it comes out of gear, it will only re-engage when the engine revs are at idle level and then it correctly defaults into first.
By using the gearshift as a like a manual car from fist to second to third etc, does not make it change up it stays stuck in first.
Changing the selector switch to "Power" from "AT" mode does not help either.
Is it possible that the "shift lock" comes into operation. I do not really know when or why a shift lock is used and have never used it.
It has got me stymied!
Image (Click to make bigger)
Saturday, August 21st, 2021 AT 8:27 AM