The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1967 - 1972 Chevrolet & GMC Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=3)
-   -   Need help identifying my differential (https://67-72chevytrucks.com/vboard/showthread.php?t=808989)

Snifflez 07-11-2020 12:23 AM

Need help identifying my differential
 
1 Attachment(s)
This is the differential I have on my 67 C10. I want to swap in some 5x5 axles and do a disc brake conversion. If have any axle recommendation they will be greatly appreciated.

68350 07-11-2020 07:18 AM

Re: Need help identifying my differential
 
When i converted my 68 to 5 lug, I bought an axle kit to do the conversion from Moser. I wanna say it was a couple hundred for the new 5 lug axles and they slid right in with no issues

68350 07-11-2020 07:20 AM

Re: Need help identifying my differential
 
Here is a link to the axles. I would shop around and see if you can find them cheaper than this link

https://azproperformance.com/product...xles-65-70-c10

Jason Banks 07-11-2020 09:14 AM

Re: Need help identifying my differential
 
Here is a cheaper axle. I'm sure it's not as good as the Moser 68350 linked.

https://www.summitracing.com/parts/mgr-mg6569

These are what I ordered and when I was installing them I noticed they were made in India. Which, in my mind having seen other metal parts from India, makes me think they may not be the highest quality. All machining looked nice though.

gmc684x4 07-11-2020 10:36 AM

Re: Need help identifying my differential
 
1 Attachment(s)
I would look up axle code or pull the axles and measure them
Some time around 70 71 gm started putting wider axles in these trucks

looks like a 12 bolt can not see the whole cover count how many bolts in the cover should be 12 bolts

Snifflez 07-11-2020 11:13 PM

Re: Need help identifying my differential
 
1 Attachment(s)
Did some looking around and I found these numbers.

LockDoc 07-11-2020 11:33 PM

Re: Need help identifying my differential
 
Quote:

Originally Posted by Snifflez (Post 8773054)
Did some looking around and I found these numbers.

Go to this thread and look it up. First 2 letters....

https://www.67-72chevytrucks.com/vbo...d.php?t=578793

LockDoc

Snifflez 07-12-2020 12:59 AM

Re: Need help identifying my differential
 
Okay well I don't know if this rear end is from 67,68 or 69

Ironangel 07-12-2020 07:48 AM

Re: Need help identifying my differential
 
The HA indicates it's a 3:73 gear. G is Chevy Gear and Axle, The 9 is the ninth day of the year and the 3 would be third shift. It is a GM Truck 12-Bolt that can be from 67-68 or 69...Might be a date stamped on the ring gear...That's not a factory panhard bar so it wouldn't be to surprising to find that the gear set has been changed and if your lucky you'll find a positrac has been installed. You wont know for sure unless you remove the cover and look at the stamped numbers on the edge of the ring gear. Judging from the crusty build up it's leaked a bit so it's a good idea to open it up and inspect it. You'll need a Fel-Pro #RDS13391 cover gasket for the GM 12T (Truck 12-bolt) and two quarts of MP SAE80w-90 gear lube. Any good synthetic will do nicely unless it's a positrac. A Posi requires 4 oz. of ACDelco LS Additive #88900330...

gmc684x4 07-12-2020 12:02 PM

Re: Need help identifying my differential
 
That is good now you know you need a set of 60 to 69 5 bolt axles to fit your diff to convert it

Captain fab on here makes brackets and has a parts store list of items

http://67-72chevytrucks.com/vboard/s...d.php?t=398352

LockDoc 07-12-2020 04:31 PM

Re: Need help identifying my differential
 
Quote:

Originally Posted by Snifflez (Post 8773084)
Okay well I don't know if this rear end is from 67,68 or 69


It doesn't make a difference. "HA" in all three years is a 3.73 and the housings are all the same. I think the only difference would be if it was a leaf spring or coil spring.

LockDoc


All times are GMT -4. The time now is 07:48 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com