Powerglide shifting - Chevrolet Chevelle Forums

03-25-2019, 06:35 PM

rlavende

Junior Member

Join Date: Mar 2012

Posts: 9

Powerglide shifting

My '68 327 has an older Comp Cam package, and shifts way too early. I've been tweaking the vacuum modulator valve (CW for later shifts) without noticeable change. I'll order a new valve to try but can't find one with confidence that it is correct. Somebody know the correct part? Any other suggestions on this issue?
Thanks,
Rich

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