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Jul 21st, 2025 | | | | Joined: Feb 2008 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2008 Posts: 47 | Hi all,
a friend of mine bought a 1957 4100 (1.5 ton)chevy. I went out to take a gander at it and noticed it had 22.5 tubeless tires and wheels on it all around. The odd thing was that the front wheels had 6 lugs and the back duels had 10 lugs. Is this normal or would you think someone has done some switching of axels over the years?
Your thoughts are appreciated.
Harrydale | | | | | Joined: Aug 2005 Posts: 1,186 Shop Shark | | Shop Shark Joined: Aug 2005 Posts: 1,186 | It's the same way on my 1954 and 1955 1st Series COE's.
Bruce | | | | | Joined: May 2005 Posts: 8,877 . | | . Joined: May 2005 Posts: 8,877 | My guess is it has a 2 ton front axle to get the 6 lug Budd wheels, and rear is likely original 1.5 ton.
Tubeless wheels were standard in 56, although many ordered the familiar 20" tube type.
If you run across any more of those 22.5" wheels with 10 lug on 7.25" circle I'm always looking for some.
Grigg
| | | | | Joined: Feb 2008 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2008 Posts: 47 | is there a way to ID whether it is a 1.5 or 2 ton front axle?
Harrydale | | | | | Joined: May 2005 Posts: 8,877 . | | . Joined: May 2005 Posts: 8,877 | Brake size?
I'm not so familiar with the later axles.
but for a 48-53 1.5 ton axle it has press in hub grease covers, and the 2 ton has covers held on with about 5 small bolts. I don't know if this holds true for the later axles.
But so far as I can tell 56-59 1.5 ton axles are 5/10 lug, and 2 ton is 6 lug Budd.
Some parts manual searching will probably reveal the truth.
Grigg | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | I don't know about the TF trucks but on AD trucks the 2-ton axle is physically bigger in several dimensions. The 2-ton front axle was an option on the 1-1/2 ton trucks though.
Check the Restoration Pack for the dimensions.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Nov 2005 Posts: 6,061 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,061 | Hy guys, the 1 1/2 ton axles I am used to, from the late 40s to the mid 50s have an eight sided end and are screwed into the hub with a very fine right hand thread, and the 2 ton bearing cap is bolted into the hub and has a dome shape to it, hope that helps.
Last edited by 3B; 12/30/2009 4:10 AM.
| | | | | Joined: Feb 2008 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2008 Posts: 47 | thanks for the info guys.It will help a lot. I will go out and take another look at it to see if I can determine what the front axle is for sure.
Grigg, I will keep you in mind if he decides to change out the wheels for some reason.
Harrydale | | |
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