78 sm465 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76shuvlinoff · 04-06-2019, 08:04 PM

78 2wd with an SM465 transmission I just changed the oil in the differential using 80-90 and I need to do the transmission. Could I get away with using something lighter than 80-90? Should I? Looking for possibly easier shifting but I am not going to sacrifice a transmission for it. With advances in lubricants these days just wondering if there's option.

And how do you fill it? Can you actually get a bottle of gear oil up in there?

04-06-2019, 08:04 PM	#1
76shuvlinoff Registered User Join Date: Aug 2011 Location: Mendon MI Posts: 13	78 sm465 78 2wd with an SM465 transmission I just changed the oil in the differential using 80-90 and I need to do the transmission. Could I get away with using something lighter than 80-90? Should I? Looking for possibly easier shifting but I am not going to sacrifice a transmission for it. With advances in lubricants these days just wondering if there's option. And how do you fill it? Can you actually get a bottle of gear oil up in there?



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