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SteelBlueZR1 · 07-22-2013

Change to Castrol from GM Synchromesh fluid completely eradicated the first gear whine in my 91 ZR-1. Just do it and the difference you'll notice in quietness and easy shifting.

07-22-2013	#6
SteelBlueZR1 Join Date: Aug 2011 Location: Evergreen, Co. Posts: 344	Re: New (to me) ZR1 with Trans Problem? Change to Castrol from GM Synchromesh fluid completely eradicated the first gear whine in my 91 ZR-1. Just do it and the difference you'll notice in quietness and easy shifting.