Another 14 Bolt Question... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

The Gibster · 04-22-2013, 06:53 PM

Right now i am in the middle of making my blazer finally drivable. Last time I was home, I lifted the back of it up to check and see if it had a locker or anything (I bought it with the 14 bolt already in) and when i spun the driver side wheel the passenger side didn't move at all but the yoke did. From reading up on other posts both the g-80 and an open diff should rotate in opposite directions. Is the carrier blown? thanks!

lowrollin70gmc · 04-22-2013, 08:03 PM

The brakes could be tight on the side that doesn't spin. If you bought the truck with that axle I would pull the cover, take a look, and change the diff oil. It's cheap and you can confirm the carrier type and bearing condition. It could even save you money down the road if you catch something slightly wrong before it destroys other parts inside.
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Mike C · 04-22-2013, 09:16 PM

With an open diff a couple of different things can happen, and you've described both. If the opposite tire won't turn, the driveshaft rotates. Put it in park or in gear and try again. The wheel on the other side should turn the opposite direction. If they are locked, they are locked it can't sit there while you turn. A worn out posi MIGHT but probably not. Most 14 bolts were open so that's probably what you have.

The Gibster · 04-22-2013, 11:10 PM

Right now the drive shaft is out so that makes sense. Definitely makes me feel better, I still plan on pulling the cover and checking everything. Thanks for the help guys

**dennislbrooks** · 04-23-2013, 07:33 PM

I have a 14 bolt 1990 SS under my 67. The g80 locker rotates both wheels in the same direction with the trans in neutral and the tires off the ground on my truck.

04-22-2013, 06:53 PM	#1
The Gibster Registered User Join Date: May 2012 Location: San Luis Obispo Posts: 27	Another 14 Bolt Question... Right now i am in the middle of making my blazer finally drivable. Last time I was home, I lifted the back of it up to check and see if it had a locker or anything (I bought it with the 14 bolt already in) and when i spun the driver side wheel the passenger side didn't move at all but the yoke did. From reading up on other posts both the g-80 and an open diff should rotate in opposite directions. Is the carrier blown? thanks! __________________ "You may be a redneck if... you have spent more on your pickup truck than on your education."

04-22-2013, 08:03 PM	#2
lowrollin70gmc Too many projects Join Date: Mar 2004 Location: Fargo, ND land of the flat hills Posts: 1,147	Re: Another 14 Bolt Question... The brakes could be tight on the side that doesn't spin. If you bought the truck with that axle I would pull the cover, take a look, and change the diff oil. It's cheap and you can confirm the carrier type and bearing condition. It could even save you money down the road if you catch something slightly wrong before it destroys other parts inside. Posted via Mobile Device __________________ Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" 70 GMC C1500 LWB My first truck: shaved, bagged, and more: the lowrollin70gmc 68 K20 Suburban 12V Cummins/NV5600/NP205/D60/11.5AAM 3.73s "Dakota Cadillac" 63 Chevy II Nova Coupe 250 I6/T56/4.56s "Economy car" 53 Willys Wagon 350/NV4500/BW4401/HP D44/9inch “Winter Wagon” 30 Model A 16 Focus ST

04-22-2013, 09:16 PM	#3
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,734	Re: Another 14 Bolt Question... With an open diff a couple of different things can happen, and you've described both. If the opposite tire won't turn, the driveshaft rotates. Put it in park or in gear and try again. The wheel on the other side should turn the opposite direction. If they are locked, they are locked it can't sit there while you turn. A worn out posi MIGHT but probably not. Most 14 bolts were open so that's probably what you have. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

04-22-2013, 11:10 PM	#4
The Gibster Registered User Join Date: May 2012 Location: San Luis Obispo Posts: 27	Re: Another 14 Bolt Question... Right now the drive shaft is out so that makes sense. Definitely makes me feel better, I still plan on pulling the cover and checking everything. Thanks for the help guys __________________ "You may be a redneck if... you have spent more on your pickup truck than on your education."

04-23-2013, 07:33 PM	#5
dennislbrooks Registered User Join Date: Feb 2004 Location: Williamsburg, Ohio Posts: 1,804	Re: Another 14 Bolt Question... I have a 14 bolt 1990 SS under my 67. The g80 locker rotates both wheels in the same direction with the trans in neutral and the tires off the ground on my truck.



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