We are trying to repair/replace the rear in a 64 1/2 ton
with a 12 bolt rear and a series 4 carrier (crown?) The
pinion gears have eaten into the housing. We would like to
simply replace the carrier but, we seem to have 17 spline
axles which were only used for a couple of model years. The
info we have indicates we need 30 spline axles in order to
buy a replacement carrier of most any type. The big
question is - where do we look for 30 spline axles in other
later model trucks so that we can use the old axle housing.
If that cannot be reasonable accomplished, does anyone know
in which vehicles would we need to look to find a complete
axle of the correct width. So far, I have not been able to
find a list of GM axle widths to help in tracking down a
donor vehicle. Any help along these lines would be greatly
Thanbks for the reply. Tried Randy and a bunch of others.
They can only provide new custom axles and recommend I
follow this route. Again, problem is 17 spline axles for
which no carriers are available without getting lucky at the
bone yard. I need 30 spline axles of the correct length to
replace the 17's in order to replace the carrier or, a
correct length complete axle assembly. Which vehicle's are
likely to have this?
On Mon, 14 Jul 2003 05:33:34 -0400, "Tim Long"
You need to measure the axle you have if you want to find a newer unit to
fit. You need the axle width from flange to flange, the distance between the
spring perches,type of spring and bolt pattern of the current wheels and
what size brakes you have. Post this info and I'll look up the specs for a
newer unit that will fit. The only other way would be to have 28 or 30
spline axles cut to fit and then fit a new carrier, OR you could take the
current carrier and have it welded up and machined back to stock or to fit
28/30 spline pinions and bearings. Lots of options but your decision on what
Pacifism - The theory that if they'd fed
Jeffrey Dahmer enough human flesh,
Thanks, Steve. I finally got back over to the truck to
measure the axles. They are 30 3/4", 17 spline with 6 lugs
w/o the lugs. We need the 30 3/4", 30 spline with 6 lugs.
This project is for my brother in law who is unwilling to
write a blank check and is looking for the least expensive
route. I have heard of welding the carrier and re-machining
but, the cost of that around here is more than an Auburn
posi carrier. That is why we are looking for replacement
axles to just use the Auburn unit or a good used stock one
if we happen to find a 12 bolt unit in good condition. This
project has nothing to do with restoration but, rather
replacing/repairing a dead unit behind a healthy 400 sbc in
this truck for a driver who would do as well with a 235. If
you have any idea where these axles may be cannabalized, we
would greatly appreciate your help or info. Thanks.
1964 thru 1970 General Motors 1/2 ton 2WD pickups, 10 or 12 bolt, all attach to
the truck in the same manner. Go salvage yard
hunting and find you another rear-end. A 10 bolt will require a special cross
u-joint to mate to your drive shaft.
The Inmates are running the asylum!
Thanks. We are out to the bone yard tomorrow with our
measuring tapes and a list of axle code specs to see what we
can find. We are hoping to luck up on some way to use a
series 4 carrier and the 3.73 gears we just bought.
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