Help with rearend code.
 

Scraped off the old grease / dirt off the rear end. It says HA 03. Can someone shed some light on this? The truck is a 67 C10 LWB with a I6 292 3 Speed.
Thanks! Darren

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Darren
Washington State
darrengale67@hotmail.com

1972 GMC C1500 (Bone Stock)
1967 Chevy C10 LWB
Looking for a 72 3/4 Ton 4x4 Cheyenne Super with little or no rust.

1967 C-10 a HA is a 3.73:1 ratio

If it is original anyways...
I'd pop the cover and treat it to some new oil, you can count the teeth while your in there.

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'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
E-mail longhornmail@yahoo.com
My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough?
Columbus Ohio