The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Oil Change for Manual Transmission and Differentials

tucsonjwt · 04-22-2017, 04:39 PM

SM 465 takes 1 gallon of 80-90. I would check for leaks before you change the transmission oil. You might have leaks at the PTO covers and need new gaskets, so an empty trans is the time to replace them.

04-22-2017, 04:39 PM	#5
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: Oil Change for Manual Transmission and Differentials SM 465 takes 1 gallon of 80-90. I would check for leaks before you change the transmission oil. You might have leaks at the PTO covers and need new gaskets, so an empty trans is the time to replace them.