timdjohn Posted December 7, 2007 Report Share Posted December 7, 2007 I need some help and/or advice in what to do. Please bear with me, as I tend to be long winded. I just purchased a 92 Grand Prix GTP, which is the car I have been wanting for a while now. As my daily driver is a 92 Grand Prix SE very plain Jane. Ok anyhow the new purchase the GTP is fully load with the sunroof the 12 way leather seat and bucket rear seat ABS the whole nine yards, but...No engine or transmission. unfortunately the car only had 77K original miles and it became attractive for some idiot to cannibalise the engine for their crappy condition GP SE. Go figure. So I have a spare GP SE that I had bought earlier to switch all the good parts to put on my SE. it has only the 3.1 engine and the trans is bad. but the engine runs beautifly with 100K on it. My question is can I put the 3.1 into the GTP that had a 3.4 in it? I figure since I have the entire parts and wiring from the 3.1 it should be simple enough. but I still need a transmission. in 92 the 3.1 took the 4t60 I believe. the 3.4 had the 4t60e. which tranny do I get? Then the other thing I am up to is in about a year or so I would lie to do a L67 swap. could I get the transmission that I would need to use for the L67 and us on the 3.1? it would save some cash later on, but I am thinking i would be making it more complicated then need be. Thanks for any advice you can give Quote Link to comment Share on other sites More sharing options...
ns87 Posted December 7, 2007 Report Share Posted December 7, 2007 You can use your 3.4 wiring harness to run the 3.1 pretty easily. I don't even think you need to switch your car's computer. The transmission for the L67 is the 4T65-E HD? Its electronically controlled. The 3.1 came with an electronic controlled transmission late 93 - 94 called the 4T60-E. The one in your 92 and my 90 I believe is a 4T60 (no E). So depending on the year of your parts car, the transmission might be an exact match. The 3.4 used a 4T60-E, so your wiring is there for the transmission at least. Anyone feel free to correct this, not exactly my area of expertise! Quote Link to comment Share on other sites More sharing options...
Chancho Posted December 7, 2007 Report Share Posted December 7, 2007 im pretty sure u hit it spot on, however i dont think the wiring from the 3.4x will work for the 3.1 so you may need to get just a 4t60 instead of the e to save from a wiring nightmare Quote Link to comment Share on other sites More sharing options...
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