Posi identification - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sport/Truck · 11-06-2010, 11:24 AM

I'd like to know how to identify a posi when scouting wreaking yards.
I found an old truck that had the "no wheel spin" option and pulled the diff cover off. I don't think it was a posi. Can someone post a picture of what it should look like? Is there an easier way to spot them with out pulling the cover off?
s/t

MAK191 · 11-06-2010, 11:34 PM

here is what the one in my 70 looked like

raycow · 11-07-2010, 12:11 PM

Quote:

Originally Posted by Sport/Truck

Is there an easier way to spot them with out pulling the cover off?

You will need to get one wheel off the ground and the transmission in neutral if the truck still has a driveshaft. Now try to turn the wheel by hand. If the wheel is difficult or impossible to turn, there is a good chance you have posi. However, don't lay down your money until you get the cover off, because it could also have frozen brakes or really serious problems like rusted internals.

Ray

11-06-2010, 11:24 AM	#1
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Posi identification I'd like to know how to identify a posi when scouting wreaking yards. I found an old truck that had the "no wheel spin" option and pulled the diff cover off. I don't think it was a posi. Can someone post a picture of what it should look like? Is there an easier way to spot them with out pulling the cover off? s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

11-06-2010, 11:34 PM	#2
MAK191 Registered User Join Date: Nov 2009 Location: FL Posts: 335	Re: Posi identification here is what the one in my 70 looked like Attached Images



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