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31pontiac's 1959 Bonneville

2022 November
of the Month

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08 Torrent GXP TRANNY


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Just started acting up a couple days ago. The tranny upshifts fine. Only when it downshifts into 4th gear it slams into it. Every other gear downshifting is fine. I know its 4th because I put it into manual mode and watched it downshift and when it hits 4th it slams down. Even in manual mode when I shift to 4th it slams. I am bringing it to dealership before my warrant runs out. Time to put stock intake back in lol

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' date='Jul 10 2011, 01:00 PM' post='57005']

Wait...did you plug back in all the intake sensors? Make sure, because leaving the IAT sensor disconnected makes the PCM jack up the transmission pressure.

Yes I never unplugged anything. I installed intake tubing pre maf so everything above is still stock. The past 3 weeks the tranny has been acting fine so im not sure now.

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