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need advice for transmission swap

zpiper92

New member
hey im new here I have a 99 grand prix 3.8 with a automatic tranny that is stuck in neutral right now. in april my car started randomly shifting itself into neutral while I was driving or if I was at a light for too long. If I restarted my car it would then shift and I would be able to move again. just yesterday when I went to go to work the car despite my best attempts and all my tricks the car would not budge.
I took the car to a tranny shop and of course they couldn't tell me what was wrong with the car exactly. it was my hopes to fix whatever the issue was myself with a few local mechanics help. I think its a solenoid but im not sure. can anyone help me out?

also If I do have to replace the tranny I have a couple of friends who have connections to get a used tranny under 100k miles and a tranny from a 01 gtp. my concern is someone had told me that "the computers have to match up or be in the right place" does anyone know what the hell this means
thanks.
 


If yours is a GTP like Smutty asked, then you can put the 01 in w/o worries. That stuff about the computer is incorrect.
 
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