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No second, no overdrive

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casperfast

15+ Year Contributor
793
10
Sep 25, 2006
Salem, Oregon
Do after the person swap into the new car I now have no second and no overdrive. I thought it might be a tcu issue so I wired in a manual shifter box and had the same result. I tried all 3 tv's I have and same result. One time I did get tcu codesfor second gear incorrect ratio and general incorrect ratio. The trans was fine before the swap so I'm trying to determine the cause. First and third and reverse are all fine. But second and forth engage then slip with no resistance.Thanks
 
Have you tried swapping TCU wires? Both plug ins at the trans are the same.. it's easy to mix them up and which will throw the car into limp mode.
 
Yes I have. But even if they were swapped the manual shifter would work correctly with first and third would it? And your talking about the pulse generators that have the transparent and black insulation right?
 
It sounds like you have a bad solenoid which is either stuck or leaking. Have you Ohm'ed the solenoids yet? They should be really close to the same ohm reading. If you hear clicking in the transmission while switching the manual shifter with the engine off, the solenoids may still be ok but the valve body may be the next concern. Inside the valve body, there are small "bearings" that seal holes to direct transmission fluid / pressurize fluid the correct way. If any of those are not working properly, that could cause your issue. A shift box is not always the answer to fix the transmission from not shifting properly :(
 
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