Please identify this 12 bolt posi carrier - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Yellow Cheyenne · 08-07-2003, 11:37 AM

Bought at swap meet that indicated it was a Chevy truck 12 bolt piece. Should have been more aware as I don't think that is what it is for. The first photo shows it setting beside a non posi 12 bolt truck carrier. The posi unit is 9" top to bottom (when measured outside of bearing to outside of bearing). Anyone know? Thanks in advance for any help.

Randy

Yellow Cheyenne · 08-07-2003, 11:38 AM

Another view.

Burnsman · 08-07-2003, 11:48 AM

What is the number on it? There should be a 6 digit (if I remember right) on it somewhere.

Yellow Cheyenne · 08-07-2003, 12:44 PM

The number partially covered by the bearing is 761. Haven't noticed any other numbers other than what is shown in the following 2 photos.

Yellow Cheyenne · 08-07-2003, 12:45 PM

The numbers can't be seen very well in the shrunken photo, but it has a big 761 on it, a smaller "2", and "CD" and a smaller yet "176" that has what look like flat head screws cast on both ends of the 176.

Burnsman · 08-07-2003, 03:42 PM

Maybe someone else can answer. I'm not real sure what it is. It looks quite a bit bigger than your existing 12 bolt. I rebuilt a couple a few years back and I want to say that the last 3 digits of the series 3 carrier were like 173 (don't quote me). Shoot, that may have even been for the car 12 bolts. I can't even begin to remember the 4-series. Way too much thinking at work has ruined my brain.

Zeus · 08-07-2003, 09:13 PM

So the smaller one is a posi? I have one like it but when I turn one wheel the other turns the opposite direction. This is when it is on a jack. I thought the wheels would turn in the same direction?

Class of 69 · 08-07-2003, 10:58 PM

NO. The smaller one is not a posi. The posi you have, I have only seen in an Olds or Buick diff. IMO not a very good one either. The axles lock by the cones outside the side gears, instead of clutch's like a Chev. I never had good luck with the cone style holding up to much HP. The cones wore into the housing, and slipped.

08-07-2003, 11:37 AM	#1
Yellow Cheyenne Registered User Join Date: Jun 2001 Location: Eastern Kansas Posts: 488	Please identify this 12 bolt posi carrier Bought at swap meet that indicated it was a Chevy truck 12 bolt piece. Should have been more aware as I don't think that is what it is for. The first photo shows it setting beside a non posi 12 bolt truck carrier. The posi unit is 9" top to bottom (when measured outside of bearing to outside of bearing). Anyone know? Thanks in advance for any help. Randy Attached Images __________________ '72 Cheyenne. AC, PS, PB, Rear slider window, tilt. Light yellow (grapefruit yellow according to new sales literature from '72) '56 Chevy short step V-8 (My dad bought it new!!) '70 Olds 442 convertible '70 Olds Rallye 350

08-07-2003, 11:38 AM	#2
Yellow Cheyenne Registered User Join Date: Jun 2001 Location: Eastern Kansas Posts: 488	Another view. Attached Images __________________ '72 Cheyenne. AC, PS, PB, Rear slider window, tilt. Light yellow (grapefruit yellow according to new sales literature from '72) '56 Chevy short step V-8 (My dad bought it new!!) '70 Olds 442 convertible '70 Olds Rallye 350

08-07-2003, 11:48 AM	#3
Burnsman Chevy Freak Join Date: Sep 2002 Location: Meadville, Pa. Posts: 2,804	Rear What is the number on it? There should be a 6 digit (if I remember right) on it somewhere. __________________ 69 GMC SWB, 350 70 Chevy LWB, 350 55 chevy gasser, 461 73 Camaro, 496 67 RS Camaro, 406 64 Chevelle, 588 71 Nova, 565 67 Camaro, 461

08-07-2003, 12:44 PM	#4
Yellow Cheyenne Registered User Join Date: Jun 2001 Location: Eastern Kansas Posts: 488	The number partially covered by the bearing is 761. Haven't noticed any other numbers other than what is shown in the following 2 photos. Attached Images __________________ '72 Cheyenne. AC, PS, PB, Rear slider window, tilt. Light yellow (grapefruit yellow according to new sales literature from '72) '56 Chevy short step V-8 (My dad bought it new!!) '70 Olds 442 convertible '70 Olds Rallye 350

08-07-2003, 12:45 PM	#5
Yellow Cheyenne Registered User Join Date: Jun 2001 Location: Eastern Kansas Posts: 488	The numbers can't be seen very well in the shrunken photo, but it has a big 761 on it, a smaller "2", and "CD" and a smaller yet "176" that has what look like flat head screws cast on both ends of the 176. Attached Images __________________ '72 Cheyenne. AC, PS, PB, Rear slider window, tilt. Light yellow (grapefruit yellow according to new sales literature from '72) '56 Chevy short step V-8 (My dad bought it new!!) '70 Olds 442 convertible '70 Olds Rallye 350 Last edited by Yellow Cheyenne; 08-07-2003 at 12:59 PM.

08-07-2003, 03:42 PM	#6
Burnsman Chevy Freak Join Date: Sep 2002 Location: Meadville, Pa. Posts: 2,804	rear carrier Maybe someone else can answer. I'm not real sure what it is. It looks quite a bit bigger than your existing 12 bolt. I rebuilt a couple a few years back and I want to say that the last 3 digits of the series 3 carrier were like 173 (don't quote me). Shoot, that may have even been for the car 12 bolts. I can't even begin to remember the 4-series. Way too much thinking at work has ruined my brain. __________________ 69 GMC SWB, 350 70 Chevy LWB, 350 55 chevy gasser, 461 73 Camaro, 496 67 RS Camaro, 406 64 Chevelle, 588 71 Nova, 565 67 Camaro, 461

08-07-2003, 09:13 PM	#7
Zeus Zeus Join Date: Dec 2002 Location: Dallas, TX Posts: 152	Posi? So the smaller one is a posi? I have one like it but when I turn one wheel the other turns the opposite direction. This is when it is on a jack. I thought the wheels would turn in the same direction? __________________ jesusventura@hotmail.com

08-07-2003, 10:58 PM	#8
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	NO. The smaller one is not a posi. The posi you have, I have only seen in an Olds or Buick diff. IMO not a very good one either. The axles lock by the cones outside the side gears, instead of clutch's like a Chev. I never had good luck with the cone style holding up to much HP. The cones wore into the housing, and slipped. __________________ 69 GMC K10 ..some restoration required....still..

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