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S10 rear axle
#1435093 Wed Dec 29 2021 07:13 PM
Joined: Dec 2021
Posts: 1
J
Jrp Offline OP
Moderated
Hello folks
I have a 52 3100 that is getting a ls swap and I’m on the hunt for a rear axle. I have found a 90 or 91 s10 rear axle that is out of a 4x4. It’s not a zr2. Anybody know if this would work? Truck will have air ride. I have read where some say it will and some say to narrow. Just trying to find out all I can before spending the cash.
Thanks for any help/ info

Re: S10 rear axle
Jrp #1435106 Wed Dec 29 2021 08:27 PM
Joined: Mar 2010
Posts: 1,075
B
Curmudgeon
Do some measuring before you buy. People can make mistakes.

http://chevy.oldcarmanualproject.com/chevyresto/52060.html

This may not be 100% correct:
Measure from flange (what the rim bolts to) to flange.
My notes says 1947 to 1955 first, 60 to 62 inches.
Compare with the donor.


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."
Re: S10 rear axle
Jrp #1435114 Wed Dec 29 2021 09:06 PM
Joined: Mar 2014
Posts: 2,763
J
'Bolter
S10 widths are: 2wd 54.5", 4wd 59", ZR2 63"
4wd comes closest. In my 1952 3100 I used a rear end from a 1969 1/2 ton Chevy pickup and it was 1 inch wider than the 1952, which worked fine (1/2 inch wider per side).

According to GM records, the 1952 Chevy should have been 61". 2 inches more narrow can make more difference than you might expect. It pulls each wheel 1 inch closer to the bed side (that gets tough if you're running wider tires than the original 600x16). Good luck.

Last edited by Jon G; Wed Dec 29 2021 09:08 PM.

Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: S10 rear axle
Jrp #1435160 Thu Dec 30 2021 02:34 AM
Joined: Jun 2008
Posts: 1,700
S
'Bolter
Jon, do you measure the width of any rear axle from backplate to backplate? The manual drawing shows 61” measured from center of tire to center of tire.

Also, somewhere on this site I saw a list of possible donor rear axles and their widths. Would you happen to know where I can find that list? Thanks


Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod
Re: S10 rear axle
Jrp #1435169 Thu Dec 30 2021 03:38 AM
Joined: Jun 2011
Posts: 4,460
E
'Bolter
A more realistic measurement is wheel mounting surface(wms) to wms, although does not correspond to any published info.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Re: S10 rear axle
Jrp #1435173 Thu Dec 30 2021 03:51 AM
Joined: Mar 2014
Posts: 2,763
J
'Bolter
Chuck, I use what makes the most sense at the time and go with that (but be constant between the 2 rear ends, of course). In this case the rear end I wanted had both wheels and tires still on it and there was enough room for me to crawl under and work a tape measure, so there was very little guesswork. In other cases where I've done rear end swaps I've used some different approaches. Remember also some wheel inset measurements are different...

I've seen that list, but I can't recall if I saw it on this site or on another. But yes, somebody somewhere did have a list like that.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: S10 rear axle
Jrp #1435341 Fri Dec 31 2021 10:01 AM
Joined: Feb 2001
Posts: 7,130
W
'Bolter
Ed, that info is out there because I used it to install the nova rear end in my 54. But after 30 years I don't know where. Maybe this. https://www.hemmings.com/partslocator/axles.html

Last edited by WE b OLD; Fri Dec 31 2021 10:03 AM.

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