I had a similar experience. The computer is sensing that the torque converter is not locking up. So after several attempts the tranny goes into protect mode (very hard shifting).
There is a valve that controls the locking up of the torque converter. The valve cylinder wall is aluminum and wears out. He will be boring it out and inserting a sleeve and a new piston device (Sonnax I believe).
Try this: As you drive down the road (in 3 not D), accelerate to 40mph and then slowly up to and settle at 45mph. You should notice the RPM should drop and you might feel a nudge when the TC locks up. At this point if you SLIGHTLY accelerate, you should not see a jump in the rpm. If the rpm rises (2000 to 2200ish) then the TC is not locked up. Keep in mind if you accelerate to hard, it will unlock the TC to meet the demand.
If you perform the action above below 40mph, you should notice the rpm increase as you slightly accelerate (just to give you an idea of what we're looking for).
Since I know what is happening, I always notice my rpm when highway or over 40 driving. Mine only acts up when it's hot or working hard.
Good luck
Monday, June 25th, 2007 AT 11:00 AM
