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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 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | I will not attempt to identify the year of an SM420 transmission. Here is general information: http://www.novak-adapt.com/knowledge/sm420.htmDate code info here (after you narrow down the years from info in the link above): http://members.cox.net/cglabe1/SM420/sm420.htmlAs stated above: "Fluid/lubricant goes into the u-joint housing from the transmission (if you still have the enclosed driveshaft)." That is also described in the Owner's Manual and/or Shop Manual. | | |
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