Do I have a posi or locker?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**thelonerife** · 03-07-2008, 06:11 AM

I have a 3/4 ton 10 bolt rear. I would like to know if it is a posi or locker. I took the cover off and it doesn't look like other posi's I've seen on 1/2 tons or cars. Looks like it has smaller spider gears next to the ring gear. When I have both wheels off the ground and turn one the other goes th same direction. Also when I lost traction in wet grass it left two tire tracks. I would post pics but haven't figured that out yet.I was told by po that it was a 4:10. Any help would be greatly appreciated!!Chuck..

slammed1 · 03-07-2008, 07:24 AM

True LOCKERS arent the norm for street vehicles so you most likely have a posi style rear differential.

Posi,Limited Slip,and other names are used for basically the same style of rear differential unit.

gringoloco · 03-07-2008, 08:13 AM

An open diff will have spiders too. Look for a spring loaded clutch pack in the middle of the carrier, between those smaller spider gears.

**thelonerife** · 03-08-2008, 04:32 AM

Okay thanks guys!

**thelonerife** · 03-11-2008, 01:32 AM

Here a pic of what looks like.

slammed1 · 03-11-2008, 05:50 AM

That is a Power Lock (just another name for a POSI) in a Dana 44 or (most likely >>)a Dana 60 from what I see. The "PowerLock" had a 2 piece case with 4 spider gears and 2 side gears and a "TracLoc" had a one piece case with 2 side gears and 2 spiders. Both units use clutches and plates for the posi operation.

slammed1 · 03-12-2008, 11:52 AM

Did you get your info needed?

**thelonerife** · 03-13-2008, 05:23 AM

Thanks I had no idea what i was looking at and it acted like- I always have heard- a posi does and the glovebox had no indication of this kind or rear. Thanks for all of you guys help!!! Chuck.

slammed1 · 03-13-2008, 07:52 AM

I think Dana rears in these trucks are cool. I built a narrowed Dana 60 for my street/strip Nova before I sold it..........it had a Power Loc and I bought a TracLoc with 35 spline side gears for better axles.Very strong rear axles......very strong.

**thelonerife** · 03-14-2008, 06:11 AM

Well I've just sold this one that was in a rolling chassis from a 72 3/4 ton for 250. So I don't know if I shorted myself or not but I needed to get it out of the yard. The guys coming from the Atlanta area to pick it up so I guess its worth the trip,

03-07-2008, 06:11 AM	#1
thelonerife Senior Member Join Date: Jul 2007 Location: Clarksville TN 37043 Posts: 8,702	Do I have a posi or locker?? I have a 3/4 ton 10 bolt rear. I would like to know if it is a posi or locker. I took the cover off and it doesn't look like other posi's I've seen on 1/2 tons or cars. Looks like it has smaller spider gears next to the ring gear. When I have both wheels off the ground and turn one the other goes th same direction. Also when I lost traction in wet grass it left two tire tracks. I would post pics but haven't figured that out yet.I was told by po that it was a 4:10. Any help would be greatly appreciated!!Chuck.. __________________ Chuck 68swb Fleetside build ''Choncho'' http://67-72chevytrucks.com/vboard/s...d.php?t=374892 My trailer redo http://67-72chevytrucks.com/vboard/s...69#post5893869 Chuy my 59 bug http://67-72chevytrucks.com/vboard/s...d.php?t=653798 Putnam 87 GMC Shop truck http://67-72chevytrucks.com/vboard/s...d.php?t=707687

03-07-2008, 07:24 AM	#2
slammed1 1972 Chevrolet SWB Join Date: Jan 2008 Location: FT Smith AR Posts: 512	Re: Do I have a posi or locker?? True LOCKERS arent the norm for street vehicles so you most likely have a posi style rear differential. Posi,Limited Slip,and other names are used for basically the same style of rear differential unit. __________________ My New thread with pics (not my build thread yet.) http://67-72chevytrucks.com/vboard/s...46#post2573646 1972 Chevrolet 1/2 ton short wide bed,68 frt clip Project. 1980 Camaro Inherited when father passed,68K Miles 2003 Ford Mach1 FUN as Hell!! 2002 Dodge Ram 5-8 slam Rolling BillBoard (Gone not forgot) 2004 Dodge Ram HEMI 10" lifted on 37's and 2wd.

03-07-2008, 08:13 AM	#3
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,920	Re: Do I have a posi or locker?? An open diff will have spiders too. Look for a spring loaded clutch pack in the middle of the carrier, between those smaller spider gears. __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy

03-08-2008, 04:32 AM	#4
thelonerife Senior Member Join Date: Jul 2007 Location: Clarksville TN 37043 Posts: 8,702	Re: Do I have a posi or locker?? Okay thanks guys! __________________ Chuck 68swb Fleetside build ''Choncho'' http://67-72chevytrucks.com/vboard/s...d.php?t=374892 My trailer redo http://67-72chevytrucks.com/vboard/s...69#post5893869 Chuy my 59 bug http://67-72chevytrucks.com/vboard/s...d.php?t=653798 Putnam 87 GMC Shop truck http://67-72chevytrucks.com/vboard/s...d.php?t=707687

03-11-2008, 01:32 AM	#5
thelonerife Senior Member Join Date: Jul 2007 Location: Clarksville TN 37043 Posts: 8,702	Re: Do I have a posi or locker?? Here a pic of what looks like. Attached Images __________________ Chuck 68swb Fleetside build ''Choncho'' http://67-72chevytrucks.com/vboard/s...d.php?t=374892 My trailer redo http://67-72chevytrucks.com/vboard/s...69#post5893869 Chuy my 59 bug http://67-72chevytrucks.com/vboard/s...d.php?t=653798 Putnam 87 GMC Shop truck http://67-72chevytrucks.com/vboard/s...d.php?t=707687

03-11-2008, 05:50 AM	#6
slammed1 1972 Chevrolet SWB Join Date: Jan 2008 Location: FT Smith AR Posts: 512	Re: Do I have a posi or locker?? That is a Power Lock (just another name for a POSI) in a Dana 44 or (most likely >>)a Dana 60 from what I see. The "PowerLock" had a 2 piece case with 4 spider gears and 2 side gears and a "TracLoc" had a one piece case with 2 side gears and 2 spiders. Both units use clutches and plates for the posi operation. __________________ My New thread with pics (not my build thread yet.) http://67-72chevytrucks.com/vboard/s...46#post2573646 1972 Chevrolet 1/2 ton short wide bed,68 frt clip Project. 1980 Camaro Inherited when father passed,68K Miles 2003 Ford Mach1 FUN as Hell!! 2002 Dodge Ram 5-8 slam Rolling BillBoard (Gone not forgot) 2004 Dodge Ram HEMI 10" lifted on 37's and 2wd. Last edited by slammed1; 03-11-2008 at 05:54 AM.

03-12-2008, 11:52 AM	#7
slammed1 1972 Chevrolet SWB Join Date: Jan 2008 Location: FT Smith AR Posts: 512	Re: Do I have a posi or locker?? Did you get your info needed? __________________ My New thread with pics (not my build thread yet.) http://67-72chevytrucks.com/vboard/s...46#post2573646 1972 Chevrolet 1/2 ton short wide bed,68 frt clip Project. 1980 Camaro Inherited when father passed,68K Miles 2003 Ford Mach1 FUN as Hell!! 2002 Dodge Ram 5-8 slam Rolling BillBoard (Gone not forgot) 2004 Dodge Ram HEMI 10" lifted on 37's and 2wd.

03-13-2008, 05:23 AM	#8
thelonerife Senior Member Join Date: Jul 2007 Location: Clarksville TN 37043 Posts: 8,702	Re: Do I have a posi or locker?? Thanks I had no idea what i was looking at and it acted like- I always have heard- a posi does and the glovebox had no indication of this kind or rear. Thanks for all of you guys help!!! Chuck. __________________ Chuck 68swb Fleetside build ''Choncho'' http://67-72chevytrucks.com/vboard/s...d.php?t=374892 My trailer redo http://67-72chevytrucks.com/vboard/s...69#post5893869 Chuy my 59 bug http://67-72chevytrucks.com/vboard/s...d.php?t=653798 Putnam 87 GMC Shop truck http://67-72chevytrucks.com/vboard/s...d.php?t=707687

03-13-2008, 07:52 AM	#9
slammed1 1972 Chevrolet SWB Join Date: Jan 2008 Location: FT Smith AR Posts: 512	Re: Do I have a posi or locker?? I think Dana rears in these trucks are cool. I built a narrowed Dana 60 for my street/strip Nova before I sold it..........it had a Power Loc and I bought a TracLoc with 35 spline side gears for better axles.Very strong rear axles......very strong. __________________ My New thread with pics (not my build thread yet.) http://67-72chevytrucks.com/vboard/s...46#post2573646 1972 Chevrolet 1/2 ton short wide bed,68 frt clip Project. 1980 Camaro Inherited when father passed,68K Miles 2003 Ford Mach1 FUN as Hell!! 2002 Dodge Ram 5-8 slam Rolling BillBoard (Gone not forgot) 2004 Dodge Ram HEMI 10" lifted on 37's and 2wd.

03-14-2008, 06:11 AM	#10
thelonerife Senior Member Join Date: Jul 2007 Location: Clarksville TN 37043 Posts: 8,702	Re: Do I have a posi or locker?? Well I've just sold this one that was in a rolling chassis from a 72 3/4 ton for 250. So I don't know if I shorted myself or not but I needed to get it out of the yard. The guys coming from the Atlanta area to pick it up so I guess its worth the trip, __________________ Chuck 68swb Fleetside build ''Choncho'' http://67-72chevytrucks.com/vboard/s...d.php?t=374892 My trailer redo http://67-72chevytrucks.com/vboard/s...69#post5893869 Chuy my 59 bug http://67-72chevytrucks.com/vboard/s...d.php?t=653798 Putnam 87 GMC Shop truck http://67-72chevytrucks.com/vboard/s...d.php?t=707687



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