Thread: hard shifting when trans heats up?

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  1. #1 hard shifting when trans heats up? 
    SE Level Member 2002 grand prix gt's Avatar
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    i have a 02 gt and when i first start driving the tranny shifts fine but once i drive around for 45 minutes to an hour it shifts hard thru all gears? i read somewhere that it had something to do with the flex plate. it does slip into 2nd gear would a shift kit help out the slipping going into 2nd? also im oredering a temp gauge soon to see if its running hot.
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  2. #2 Re: hard shifting when trans heats up? 
    Moderator dsmuts's Avatar
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    Do a fluid and filter change and add a bottle of lucas stop slip and that most likely will take care of it.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  3. #3 Re: hard shifting when trans heats up? 
    Donating Users Bronco Boy's Avatar
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    Could possibly be code P1811. Get a scan tool and check for engine codes.

    Go here for my write-up.

    Been almost a year since I installed the shift kit. Still going strong, runs as tight as can be expected and hasn't gotten any worse with time. She will shudder on the 1-2 shift when I romp on 'er, but I don't romp on 'er to much these days.
    Chris B
    2009 CX-9
    ** SOLD ** 2002 GT
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