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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: 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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