So I was looking at the GM heritage center's data on the pre '41 chevy trucks and ncame up with a rather niche question.

I noticed that a 5.43 rear axle ratio was standard on most of the 1 1/2 tons while the 6.17 was an option.

All of the advance design 1.5 ton trucks have the 6.17 ratio, and I've seen posts that mention the H110 was built into the '80's and you could find 3rd members with 5.43 gears.

Seeing all the previous 1.5 ton rear axles with 5.43 ratios made me wonder if those old axles had the same 3rd member design and bolt pattern that the advance design and newer H110's had.

Has anyone looked at this, or does anyone have any of the older 1 1/2 ton rear axles or 3rd members laying around to compare with a newer advance design rear axle?


Liquidated my projects
Now looking for a decent '47-'55.1 3100, 3600, or 3800