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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!
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| | | | Joined: Sep 2011 Posts: 57 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2011 Posts: 57 | Could someone tell me what the recommended weight of gear lube I should use in my transmission and rear end on my 46'
half ton. Thanks.
Jim- | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | 90 weight gear oil. hyoid type for the rear end, and hypoid or non-hypoid gear oil for the transmission. See if someone has reliable recommendation for a modern 90 weight or multi-weight gear oil in both. | | | | | Joined: Jul 2008 Posts: 1,321 'Bolter | | 'Bolter Joined: Jul 2008 Posts: 1,321 | Tim, I opened the site you posted above. I have a question for you. The Manual says the 1/2 & 3/4 ton trucks left the factory with Hypoid Axel-SAE 90 in the axles & transmissions. The last paragraph says "all transmissions had SAE 90 Transmission or Mineral Oil Lubricant" Is this a misprint or is the Hypoid Axel-SAE 90 and SAE 90 Transmission or Mineral Oil Lubricant the same thing?  I'm restoring a 1946 & this is of interest to me. Thanks, Harold
Harold
Is a restoration ever finished? | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The hypoid gear lubs are high pressure lubs. You must use that in rear ends. GL-5. You can also use it in the trans. You can use any of the multi viscosity as long as it covers the recomended weight. I use 85/140 in everything. These manuals are reprints from the originals. A lot has changed since then in lubricants & recomendations.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
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