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Mod | | | Forums66 Topics128,072 Posts1,055,906 Members48,429 | | 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: Dec 2015 Posts: 2,063 Big Bolt Forum Moderator | | Big Bolt Forum Moderator Joined: Dec 2015 Posts: 2,063 | welcome to the site! I use 90wt gear oil in the rear end, and transmission. My tranny is an SM420 though, but I believe yours would take the same. Engine oil, 30wt, 10-40 or if you are in a warmer climate, you could go with 20-50. you should also be able to find all the info you want in this online manual. http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0001.htm | | |
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