Transmission could be adversly effected. Shifting problems can occur and worse case the transmission can be permantly damaged.
The transmission is shot ... or very very low on fluids.
A 2000 Jeep automatic that is not shifting correctly after it gets hot might have something wrong with the speed sensor that is located in the transmission. The speed sensor tells the transmission what gear to shift into at certain speeds.
have you checked the oil level in the transmission ? I'm betting the answer is no
O2 sensor or vacuum leak
Have you checked the fluid level? Have you changed the filter and fluid as normal maintenance?
I had the same problem. Except that the transmission was not shifting as well. It was the transmission control module. It cost me about $450 to fix at the dealership 4yrs ago. I have had no problems since.
If your car has a manual transmission, and it over rev's in every other gear as well, than no doubt it is your clutch. Other wise it is your transmission.
Check your transmission fluid. This happened to me in my 1992 Chevy Silverado & it turns out I had a tranny fluid leak.
It means there is a problem in the transmission and you're not shifting into overdriver properly. Have your transmission serviced to find out what's wrong. You need to change the fuse if that dosent work then you have a short somewhere.
It's a defect with most Explorers and Mountaineers from 2002 to 2006. There was a maintenance recall in 2004 for 2002-2004 models. The factory put the wrong transmission fluid in the sealed case. Anyway, if you havent went back to the dealership and had it looked at, it will cause all types of problems in the immediate future.
If a person adds the wrong transmission fluid many things can happen. Some cars can continue to run, others will have problems and stall out or not provide a smooth ride.