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03-26-2013
EricGTP I made the swap and yes you will need a different shorter shaft & you will get a code 730 gear ratio code unless you program PCM for new gear ratio! But the better alternative is to change trans diffs then you end up with HD diff and no codes!
03-26-2013
Have 01 GTP changed trans to 05 Century. I think that is 2.93 to 3.29. when I read gear ratio in HPTuner it says that it is set to 3.29 but it throws me codes 1810 & 730
Also car sometimes shifts perfect and other it goes from 1st to 3rd(in this mode seems like it goes to full pressure, Harsher shifts) and that's it. Changes when ignition key is cycled sometimes.
Set tire size (In HPTuners) to 25.82 and ratio to 3.42, now no more codes but trans now doesn't shift correctly once again. Only goes from 1st to 3rd no other gears and no lock up!
(Next day)Just tried it again ad now it worked! Doesn't make any sense!
Drove it last night still worked but did not shut off check engine light came on. Again this mourning went 5 miles shut off for 30 minutes and returned again no shift. also checked pcm for dcts before and 1810 returned.
Can Any one help me here?
04-07-2013
Hey Dave and Bill,
I got a built tranny for a 99 GTP (with 300m input shaft, 7/8ths chain, etc.) and the car rotted out to the point where I scrapped it, well I bought an 04 GT (L26 not L32 and NO TAPSHIFT) and was wondering what I have to change wiring wise to make it work in this car before I put it in. I have a spare transmission harness from a 99 that I can change the pins around on if I need to then put that in my 99 trans that's sitting on the table. I also noticed that the 04 doesnt have the plastic box on top for the BCM&PCM to know what gear you're in, that's intresting.
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