I just purchased a 98 Jeep Grand Cherokee 4.0 6cyl, auto w/select trac 115k.

The engine light is on and the previous owner said the codes where e-3 and e-4 (something to do with the transmission solenoids). I have also heard could possibly be the TP sensor. My issue is, the jeep will go in and out of over-drive and sometimes will not even go into overdrive all together. The other 3 gears shift normal. I know there is some type of temperature sensor that will affect the overdrive when the tranny is too hot. I do not believe that is the issue though. The truck is operating at normal temp (about 250 degrees - needle is half way on the gauge never past). Other then the transmission issue the truck is "MINT".

Any direction would be greatly appreciative.
Thanks in advance Charlie Z

 

You need check the codes , go to autozone or pep boys whatever is close and have them check and report back.
Something is already there telling you what's wrong, so theres no sense in guessing

 

Temp is 210 degress or just about 1/2 way on the gauge... NOT 250 as I first stated... Sorry typo..