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Re: GM TH350 No upshift in 'D'
Posted to Transmission Forum on 9/19/2009 1 Reply

Actually, it wouldn't upshift in M2, the only way I was able to get it to upshift was to start out in manual low, bring the RPMs up to about 3500, then shift to M2, again to 3500RPM, and finally to drive...it shifted through all 3 gears no problem when i did t... Login to read more.

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