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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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Lubrication of the enclosed u-joint with an SM420 transmission.The lubricant addition hole is on the upper right side of the SM420 transmission. transmission lubricant additions - up to the hole, if lubricant oil is not warm - 1/2" below the hole if the lubricant oil is not warm To speed things up in filling a empty "cold" SM420 transmission, I take out the gear lever and fill through the top until the lubricant comes out that hole on the upper right side. (put a drip tray under the transmission to catch the "overfill") | | |
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