1994 jeep yj overdrive issue
hey everyone im new to the forum and i was hoping someone had some advice for my overdrive issue ive been having. my transmission is an automatic about 3 years old after the original owner switched out the manual tranny. it doesnt have any problems shifting at all its very smooth but when i approach the 40 mph the jeep wont shift into overdrive 9/10s of the time. I don't think it is anything significant i'm just unsure of what it could possibly be. any suggestions?