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- - Rear Axle codes? (https://67-72chevytrucks.com/vboard/showthread.php?t=771040)

Rear Axle codes?

I did a few google searches and nothing came up.

Is there any where I could go to identified the gears in the rear end?

The axle code starts with KAD and is out of a 74 2wd C10.

Did the 73-74 12 bolts come with the posi option?

Re: Rear Axle codes?

Quote:

Originally Posted by 67see10 (Post 8340891)

Look at the parts books. Axle codes are in the first section.

1974 KAD was a C10 axle equipped with a locking diff and 3.07 gears.

You can see that some of the 73 P & G series Vans had positraction. so... GM differentiated between the locker and posi. I don't believe the 73-91 CK trucks got Positrac. Don't use limited slip additive in this axle if it has the original Eaton Locker.

http://gmpartswiki.com/getpage?pageid=60427

http://gmpartswiki.com/getbigpage?pageid=60427

Re: Rear Axle codes?

After 44 - ish years there's really no telling what's in there.

Best bet is to pull the cover and count teeth and replace the gear lube while you are at it.

K