94 Lesabre Over Drive quits after 30 min.

[jpersall]

Has anyone experienced a problem with the over drive not working after being on the road for 30 minutes or so. This time varies and sometimes it will work for a couple hours, but eventually it just stops shifting into over drive.

[g8124u]

has anyone found an answer to this problem??? my mother is having a similiar one.

[sturdei]

No answer but mine is doing the same thing. It started happening shortly after the 150,000 mile transmission fluid change. I've tried additives to teh transmission fluid but nothing helps. It will run for just a few miles in overdrive, then drops back to third gear and won't go back into overdrive again until I shut it off and start the engine back up again. I can't help but think it's computer related because of that. Also when in overdrive but running in third gear, when I let off the throttle to slow down, it comes out of gear and the engine idles, regardless of my driving speed at the time. Then when I hit the gas again, it revs up and shifts back into third gear and continues on its way.