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Mod | | | Forums66 Topics128,134 Posts1,056,402 Members48,441 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Jan 2007 Posts: 99 Shop Shark | | Shop Shark Joined: Jan 2007 Posts: 99 | I have a 1951 Chevy 3604 (3/4 ton) truck. Does anyone know how much gear oil I will need to purchase in order to change it out? I don't have anything big enough to measure it with if I were to drain it now, that way I can pick up the oil and a new gasket all at the same time. Thanks in advance, Jeff. | | | | | Joined: Jul 2006 Posts: 451 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 451 | | | | | | Joined: Jan 2007 Posts: 99 Shop Shark | | Shop Shark Joined: Jan 2007 Posts: 99 | Thank you so much Cavebull, I have the 1951 shop manual but did not see that in there. Thanks again! | | | | | Joined: Jun 2010 Posts: 170 'Bolter | | 'Bolter Joined: Jun 2010 Posts: 170 | Another question to hijack the topic. I just got my issue of Skinned Knuckles and it has an article on the proper trans and diff lube. Basically that new lubes are bad for brass and bronze bushings. Is this a concern for our stovebolts? Curious what gear oil others are using. Thanks. | | | | | Joined: Aug 2011 Posts: 835 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 835 | If you are concerned about this, go to some place like agri-supply and get a bucket of 90wt gl1. many of the gear oils today are gl5, which is the rating that may cause problems with brass/bronze.
This is what I do. I have a number of antique tractors that I run 140wt gl1 gear lube.
Kurt | | | | | Joined: Mar 2008 Posts: 1,775 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 1,775 | Tractor Supply has GL1 90w gear oil, last time I was there it was labeled as Ford Tractor Gear Oil. You could also use a non detergent 40w or 50w motor oil. 90w gear oil and 50w motor oil are the same viscosities. | | |
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