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1957 1/2 ton H033 axle spacer
#1347171 Wed Feb 19 2020 04:57 PM
Joined: May 2007
Posts: 95
L
Shop Shark
Good morning,
Last night I reinstalled the rear axle shafts in my 1957 1/2 ton. Once I got the shafts in place, I checked the clearance between the axle spacer and one axle shaft per the manual, and I got approx .029”. The manual calls for .014” or less. Does anyone have a source for thicker spacers or any other ideas to fix this? I’m not sure how big of a deal the extra space is.
Thank you,
LJ

Re: 1957 1/2 ton H033 axle spacer
LAJones48 #1347912 Tue Feb 25 2020 09:06 PM
Joined: Jul 2018
Posts: 45
S
Wrench Fetcher
Did you put it in the same way it was taken out. They have a marring from where the end of the axles touch up against them. I think they could be given 1/4 of a turn to go against the sides that were not riding against the axles. That could possibly get you back to spec, maybe...


Frank
1948 5 Window Chevy 3100 an absolute rescue that is now back on the road
1953 Buick Super 1 family owned since new
1956 3200 Big Window

Re: 1957 1/2 ton H033 axle spacer
LAJones48 #1347914 Tue Feb 25 2020 09:21 PM
Joined: May 2007
Posts: 95
L
Shop Shark
Thank you for your reply. The original spacer is only ground on two sides so it was easy to see how it had been installed. I found a NOS spacer that is ground on all four sides, and it can be installed with two different possible widths. That should get me closer to where it should be. I will post the results when I have time to install the new part.

Larry

Re: 1957 1/2 ton H033 axle spacer
LAJones48 #1347918 Tue Feb 25 2020 09:31 PM
Joined: Jul 2018
Posts: 45
S
Wrench Fetcher
I had just recently worked on my rear and the spacer is very crudely made. It is not a precision fit on the cross shaft and if you look inside of it you can see the score marks from the boring process when it was made. The width on the other had has to be correct tho. I have 2 different pumpkins from this type and both are the same. LOL


Frank
1948 5 Window Chevy 3100 an absolute rescue that is now back on the road
1953 Buick Super 1 family owned since new
1956 3200 Big Window

Re: 1957 1/2 ton H033 axle spacer
scenarioL113 #1347920 Tue Feb 25 2020 09:34 PM
Joined: May 2007
Posts: 95
L
Shop Shark
I agree. I have several differentials in my shop, and none of them fit the cross pin very tightly.

Re: 1957 1/2 ton H033 axle spacer
LAJones48 #1347958 Wed Feb 26 2020 04:06 AM
Joined: Feb 2004
Posts: 20,187
H
Boltergeist
In the grand scheme of things, I doubt that an extra few thousandths of end play on the axle shafts would ever cause a problem. However, if the idea of running a little out of spec causes you to lose sleep, why not have a good machinist make a spacer block from oil hardening tool steel thick enough to get the clearance within specification, get it cherry red with a rosebud torch, and quench it in a bucket of motor oil. If it was my truck, I'd already have it reassembled and put a bunch of miles on it!
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: 1957 1/2 ton H033 axle spacer
LAJones48 #1347961 Wed Feb 26 2020 04:39 AM
Joined: May 2007
Posts: 95
L
Shop Shark
Thank you, Jerry. I respect your experience, and I know I tend to overthink things. In my neck of the woods, I am known as a problem solver if you have the time to let me do my thing. Sometimes it’s best to git er done.
Larry

Re: 1957 1/2 ton H033 axle spacer
LAJones48 #1347963 Wed Feb 26 2020 05:00 AM
Joined: Dec 2011
Posts: 119
D
Shop Shark
LAJones48
I happen to have an extra 57 3100 spacer. Would be happy to mic the outside dimensions of it for you for comparison. The stock rear ends I've seen (only a few) seemed like they all measured about the same. PM me if you want to.
delky dave in Wyo


1957, 3100, v8
1990 Suburban
Re: 1957 1/2 ton H033 axle spacer
delky #1347974 Wed Feb 26 2020 01:58 PM
Joined: May 2007
Posts: 95
L
Shop Shark
Thank you. I’m going to try the spacer that I mentioned in Post #3 above. When I do that, I’ll post my results and the dimensions of the new spacer compared to the old. I’d be interested how that compares to your spare.

Larry

Re: 1957 1/2 ton H033 axle spacer
LAJones48 #1347978 Wed Feb 26 2020 02:19 PM
Joined: Mar 2019
Posts: 685
G
Shop Shark
Ditto to what hotrod lincoln said. Try the new spacer and see. But i wouldn't loose sleep over it. If you put the cross pin in and theres no chance of the axle coming in far enough ,or even close for that matter, to let the clip fall out, then whats the point? Your really not solving a problem if the problem dont really exists....JMO

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