ID this rear end - POSI?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**JQ-72** · 08-05-2006, 12:01 AM

I just bought a 70 K20 and it lists NoSpin rear axle and even has a owner's manual from Detroit automotive concerning the NoSpin in the glovebox. I pulled the inspection plate today and the carrier does not look like I expected it to. I tried turning the wheels with the rear end raised and got both wheels to turn the same direction momentarily, but mostly just one wheel would turn. Here are some pics - someone help me out!!
Joshua

ckhd · 08-05-2006, 12:25 AM

The detroit locker does not work like a clutch type positraction and will spin one wheel.

It does look like the detroit locker to me (looking through that little rectangle in the pic on the left). Looks like it has the gear type locking mechanisms. Judging from the tiny bit I can actually see, I think it's a locker.

ckhd · 08-05-2006, 12:26 AM

Let me clarify that first sentence... It will spin one wheel off the ground, like you were doing. When power is provided through the driveshaft, both wheels turn.

meathead95 · 08-05-2006, 03:21 PM

what are your plans for it? sell? trade?

1969 GMC · 08-05-2006, 08:36 PM

that is the no-spin, i have one also. they can "unlock" allowing only one wheel to turn. try turning the wheel as hard as you can which will cause it to lock.

**JQ-72** · 08-05-2006, 11:06 PM

Thanks for the help, guys.
Keith, I bought the truck to resell. Now that I know the rear end is a NoSpin, I am going to swap it with the one wheeler in my 72 K-20. The "doner" truck is a 70 K-20, 350/350/205, ps, pb. Come on down and check it out!!
Joshua

meathead95 · 08-06-2006, 08:40 AM

send me some pics and a price. i need something to lug my new tractor around with meathead95@hotmail.com

meathead95 · 08-06-2006, 08:47 AM

im sure you know this but if your just swapping the rear make sure the ratio's are the same first.

**JQ-72** · 08-06-2006, 09:45 PM

That is the first thing I checked - they are both 4.10's. I sent you pics of the truck.
Joshua

08-05-2006, 12:01 AM	#1
JQ-72 Senior Member Join Date: Feb 2001 Location: Killen, Alabama USA Posts: 3,615	ID this rear end - POSI?? I just bought a 70 K20 and it lists NoSpin rear axle and even has a owner's manual from Detroit automotive concerning the NoSpin in the glovebox. I pulled the inspection plate today and the carrier does not look like I expected it to. I tried turning the wheels with the rear end raised and got both wheels to turn the same direction momentarily, but mostly just one wheel would turn. Here are some pics - someone help me out!! Joshua Attached Images

08-05-2006, 12:25 AM	#2
ckhd Registered User Join Date: Oct 2000 Location: St. Johns, Arizona Posts: 2,660	Re: ID this rear end - POSI?? The detroit locker does not work like a clutch type positraction and will spin one wheel. It does look like the detroit locker to me (looking through that little rectangle in the pic on the left). Looks like it has the gear type locking mechanisms. Judging from the tiny bit I can actually see, I think it's a locker. __________________ my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans?

08-05-2006, 12:26 AM	#3
ckhd Registered User Join Date: Oct 2000 Location: St. Johns, Arizona Posts: 2,660	Re: ID this rear end - POSI?? Let me clarify that first sentence... It will spin one wheel off the ground, like you were doing. When power is provided through the driveshaft, both wheels turn. __________________ my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans?

08-05-2006, 03:21 PM	#4
meathead95 computer illiterate Join Date: Jan 2001 Location: Des Moines, IA Posts: 6,446	Re: ID this rear end - POSI?? what are your plans for it? sell? trade? __________________ 72 2wd blazer 72 swb 4x4

08-05-2006, 08:36 PM	#5
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	Re: ID this rear end - POSI?? that is the no-spin, i have one also. they can "unlock" allowing only one wheel to turn. try turning the wheel as hard as you can which will cause it to lock. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

08-05-2006, 11:06 PM	#6
JQ-72 Senior Member Join Date: Feb 2001 Location: Killen, Alabama USA Posts: 3,615	Re: ID this rear end - POSI?? Thanks for the help, guys. Keith, I bought the truck to resell. Now that I know the rear end is a NoSpin, I am going to swap it with the one wheeler in my 72 K-20. The "doner" truck is a 70 K-20, 350/350/205, ps, pb. Come on down and check it out!! Joshua

08-06-2006, 08:40 AM	#7
meathead95 computer illiterate Join Date: Jan 2001 Location: Des Moines, IA Posts: 6,446	Re: ID this rear end - POSI?? send me some pics and a price. i need something to lug my new tractor around with meathead95@hotmail.com __________________ 72 2wd blazer 72 swb 4x4

08-06-2006, 08:47 AM	#8
meathead95 computer illiterate Join Date: Jan 2001 Location: Des Moines, IA Posts: 6,446	Re: ID this rear end - POSI?? im sure you know this but if your just swapping the rear make sure the ratio's are the same first. __________________ 72 2wd blazer 72 swb 4x4

08-06-2006, 09:45 PM	#9
JQ-72 Senior Member Join Date: Feb 2001 Location: Killen, Alabama USA Posts: 3,615	Re: ID this rear end - POSI?? That is the first thing I checked - they are both 4.10's. I sent you pics of the truck. Joshua

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