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Old 12-20-2014, 08:37 PM   #1
wick22
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rearend id help

rearend is in my 57

its a 12 bolt and has a eyelet on top of rearend for a panhard bar and is 6 lug

wondering what year rearend i may have

wanting to change to 5 lug but wanna order correct parts

any advise is apreciated

looking at axles at summitracing YA G3893606

Last edited by wick22; 12-20-2014 at 09:04 PM.
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Old 12-20-2014, 09:12 PM   #2
1project2many
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Re: rearend id help

Pictures might help. If it's a stock axle, 12 bolt cover and six lug axles is probably a truck 12 bolt. It's not as strong as a car 12 bolt but it's usable for many applications. Does this axle look like yours?



The Yukon axles might work. Double check length before ordering.
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Old 12-20-2014, 09:23 PM   #3
Donaldo
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Re: rearend id help

I just narrowed my GM 12 bolt rear end, dealt with Moser Axles - they were quick, and even better - they fit the first time !

You can get a work sheet off their website, call them with the measurements you want.
I found them really easy to deal with.
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Old 12-20-2014, 10:21 PM   #4
Highsider
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Re: rearend id help

12-bolt, but no eyelet. What do you'all think I have?
There are numbers on the top passenger side axle, but I can't read them very well.



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Last edited by Highsider; 12-20-2014 at 11:51 PM.
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Old 12-21-2014, 12:34 PM   #5
1project2many
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Re: rearend id help

12 bolt truck. Rear cover is unique to that rear. Need numbers to try and narrow it down.
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Old 12-21-2014, 12:44 PM   #6
wick22
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Re: rearend id help

there are numbers on it ill get them

id def like to id specific year and specs on it

i do know its a 3.73 open diff
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Old 12-21-2014, 01:10 PM   #7
57chevyman
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Re: rearend id help

looks like the same 12 bolt rear i have in my truck from a 1972 chevy truck
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Old 12-21-2014, 01:30 PM   #8
Highsider
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Re: rearend id help

Tell me what that "panhead" bar does?

I was thinking mine was stock for the original 6-cylinder it came with and had a 3.73 ratio.
I have 5-bolt, but I wondered if that has been updated. I can't recall how many lugs my
1955.2 I owned when I was 16.
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Old 12-21-2014, 04:10 PM   #9
1project2many
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Re: rearend id help

The 67-72 Chevy truck had rear coils. The panhard bar keeps the truck located properly. That was done so the Nascar boys could run a three link coil sprung rear end. They still use it today. GMC got coils in '67 too but they had a bad tendency to wheel hop in mud and loose dirt so GMC switched back to leaves in '68 or '69.
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Old 12-21-2014, 05:57 PM   #10
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Re: rearend id help

Want to add to the above:

First year for coils was '60, not '67.

Article and pictures here:
http://www.earlyclassic.com/Tech.asp...;s+Makeover+II
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