Dodge Ram Overdrive Lockout

jim_toot · #1 Dec 2, 2006, 08:45 AM

The lock-out indicator light in my 94' Dodge Cummins Diesel 2500 Ram pickup stays on and the transmission will not shift into overdrive. I have tried disconnecting the speed indicator and checked and cleaned all the electrical contacts. If I disconnect the lockout switch it still won't shift into overdrive. As soon as I reconnect the lockout switch the light indicator is always on. Is there anyway I can elliminate lockout completely as I never use it anyway? Do you think it is a TCM problem or the solenoid? Does the solenoid shift the transmission into overdrive or out of overdrive when activated? Where can I find a schematic or solenoid (and transmission) service information? The Haynes Repair Manual chooses not to supply anything but a bare minimum amount of info on the automatic transmission



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