Thread: Odd 4th to 2 down shift 05gtp

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  1. #1 Odd 4th to 2 down shift 05gtp 
    Florida Tuner Z34Phoenix's Avatar
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    Ok so i just tuned kurupt's 05 GTP but he is having an issue when he lets off the gas. It will down shift from 4th down to 2nd quickly skipping over 3rd. has anyone seen this issue before? In the tune the only trans settings that were changed were the 2-3 and 3-4 WOT rpm and mph. no other trans setting was adjusted.

    96 Z34 (RIP LQ1 14.81@92.3) L36 Swap 14.9@91.5 www.cardomain.com/id/z34phoenix
    Topswap: P&P All,Si Valves,L76's,LW Pushrods,SD's,DHP PT PB 13.91@99.8
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  2. #2 Re: Odd 4th to 2 down shift 05gtp 
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    What's also happening is basically when I let off the gas the car downshifts to the previous gear and the second I give it some gas shifts quickly to the next gear and accelerates its a pain in the ass on the highway it downshifts in all gears hope this helps
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  3. #3 Re: Odd 4th to 2 down shift 05gtp 
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    damn all them views and no answers well I swapped in my old pcm and everything works fine guess something is wrong with my tune
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  4. #4 Re: Odd 4th to 2 down shift 05gtp 
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    Issue solved. I used a new bin file and removed the radio fuse while performing the write. ( full write as the 05 gtp won't accept partial's). Shifts correctly now.

    ps thank for the suggestion at thereto guys! It was a blast.

    96 Z34 (RIP LQ1 14.81@92.3) L36 Swap 14.9@91.5 www.cardomain.com/id/z34phoenix
    Topswap: P&P All,Si Valves,L76's,LW Pushrods,SD's,DHP PT PB 13.91@99.8
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