If your 1997 Chevy diesel will not shift into overdrive, you might have an issue with a transmission sensor. Some of these vehicles have several sensors that must engage in order to shift.
The same thing happened to my dads 96 Chevy S-10. The transmission was rusted not allowing it to shift. I would have the transmission checked out.
what would transmission not to shift in to overdrive
you probably have a button or switch to turn overdrive on and off, it may be on the end of your shift lever, you probably want to keep the overdrive on, save you some gas, hope i helped
If the overdrive switch is turned off then the car will not go into overdrive. As it is not in overdrive, then it will not downshift out of overdrive as it normally would. It also will not shift to 3rd gear above a certain factory preset speed. Turn th overdrive on and see if it operates normally.
Answeri had the same problem of transmission not going into overdrive.i changed my thermostat and it works fine now.give it a try .
Linkage adjust
would you rather it shift slow????????
Your transmission might automatically shift out of overdrive while driving on the interstate because of low transmission fluid. This issue might also occur because of a bad transmission sensor or overdrive sensor.
There is a push button on the end of your automatic shift lever. Pushing it in causes the Overdrive to turn on and off.
Mine is getting 10ish without the overdrive engaging, so I'd guess it would do better with overdrive.
Even after pushing the overdrive cancel button again ? to allow the overdrive feature On my Ford Explorer with the column shift automatic , the overdrive switch is on the end of the gear selector lever
Automatics would include th350, th400, or the 700r4, if you want a overdrive.