1991 Dodge Ram Wagon B350 Q&A

1991 Dodge Ram Wagon B350 Question: transmission does not shift into overdrive

transmission does not shift into overdrive. the light in the switch is off, pushing the switch in does not change anything, is there a overdrive switch relay that could possibly be bad. If so where is it located? -
Answer 1
i just had a simuliar problem with my toyota highlander, I flushed the transmission fluid and change the filter if your car has one. THen I put a a lucas oil conditioner and Im good -
Answer 2
I have the same. Overdrive trouble could be solenoid left side trans above park/neutral swicth, Trany temp switch I have not located, coolant temp I have not checked and speed sensor that I changed. CC don't work -