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2001 24V only getting 8.5 volts to fuel pump. Works fine with 12 volts to it. Will not cut on with low voltage . I assume it gets its power from ECM or PCM. Please help. Feul system relay works fine with 12.5 volts

FOUND IT!!! Broken ground inside insulation at plug to OSS. 4 hr round trip todat and shifted like brand new. No unlocking and dropping to 3rd. BTW i am calling limp mode 20MPH/2000RPM Maximum

Took my 3 hr round trip to Atlanta today shifted fine without using mystery switch. Got 20 miles from home and truck went into limp mode and trew code P0720. Changed OSS still went into limp mode at 15-20 MPH. Made it home. Any help on schematics and voltage specs for the Output Speed Sensor...

Don't see where that would be a problem as long as you know your on the right wire.

Finally dawned on me that my mystery switch started having a mind of its on the afternoon after i changed out the trans speed sensor again(code in ECM P0731 if I remember right). Put speed sensor that threw code back in and drove ten miles without having to use switch. Trip to Atlanta tomorrow...

Sorry about not keeping everybody posted, been a rough month. Ended up replacing batteries, starter, gov sol and transducer. Still had to use mystery switch most of the time. One day the truck went into what I will call limp mode(stayed in 2nd gear) for about two seconds in the morning and about...

Yeah, got a close friend who has a son-in law that works at a Dodge dealer. He is calling him as of right now. I'll keep you posted.

Mystery switch installed and everything stays in w/ no slipping. Changed fluid, filter, gov solenoid, and transducer, still unlocking and dropping into 3rd.

Is this wire on the engine side plug at the pcm. What color is it? Want to make sure I get the right wire

Trans is due now(25000 miles). Gov solenoid and transducer has never been changed. I thought about the mystery switch. Could you point me in the right direction on how to install.

It is shifting into overdrive and locking up but as soon as it makes its final shift it will start unlocking/downshifting and will stay in what I will call 3rd gear unlocked under heavy trottle. If i go to light throttle/ not heavy pull it will start "hunting". This hunting is a more extreme...

I have a 2001 3500 350K on the engine 200K on the Jasper transmission. Have dealt with the usual TC lock/unlock issues usually fixed by cleaning batt terminals. But now it shifts normally until it reaches final gear, unlocks and from there it is hit or miss on when it will lockup and go into OD. It...