93 cummins auto trans no overdrive
 

I got a question need help... My 93 dodge cummins will not go into over drive, I have checked the cv cable and replaced was not working as smooth as it should have re set to your specs from other members. I have done a couple mods injectors,exhaust and turned up pump. Should be in the ball park of 300hp I adjusted tps as you guys listed checked for dead spots, none found my idle voltage is .50 and wot voltage is 3.65 I used a 10mm wrench to decrease voltage to what i have listed but will not turn any lower ??? what am i doing wrong or over looking? All other gears ok it shifts into 2nd gear around 15 mph. Please help. Thanks todd.

The OD is operated by a solenoid which is controlled by the PCM. You could have a problem with the PCM or wiring, the shift solenoid could be bad or the OD clutches could be worn out. Does your fluid look or smell burnt?

is the od light flashing

Updates??

Please update.

93 dodge over drive prob solved
 

Thanks for the help it was the wiring for the switch on the trans cooler line was broken and not allowing trans to shift to over drive

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Hey guys got a question ... I have a factory trans cooler under the bed on drive side, But not hooked up 2 rubber hoses running up to front of truck and then cut? where should that be tried in ?? Once i know this i will have cooler check out and then hook up again. Thanks for help on the other trans over drive prob i really appreciate all the in put But it was a broken wire at the switch on the cooler line. Thanks again todd

Needs to be tied in on the hot line.