confused. differentials - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Benelli · 01-12-2010, 11:50 PM

I was hoping someone could help me with this.

If I take off from a stop light, real quick like it'll let one tire loose. If I'm stuck in the mud/snow and romp on it, it'll spin both tires, hell it'll spin all 4 and look pretty sweet.

This is all on a 1979 K10, I don't understand why it will spin both tires on say ice but it'll do the one-wheel-peel on the dry stuff.

Can someone explain this to me?

onlyifihadachevy · 01-13-2010, 12:06 AM

I'm assuming when in the mud and snow your stuck by the way of high centering. So no tires are touching the ground. And on the dry stuff one tire is planted on the ground, the other is spinning unable to get traction.

1970GMC468 · 01-13-2010, 01:28 AM

Open diffs will occasionally spin in the loose stuff if the truck is straight and everything is perfect. If you have a posi traction rear end it is possible that the clutches are worn out and not grabbing well on the dry stuff. Just my two cents.

Burt4x4 · 01-13-2010, 11:18 AM

Yup, open diff or worn limitedslip/posi
Take the rear cover off and see what is in there, If you need help identifying it snap a pic and post it up.

Benelli · 01-13-2010, 04:16 PM

Will do, thanks guys.

Benelli · 01-24-2010, 02:31 PM

Open?

powerdriver 1958 · 01-24-2010, 03:19 PM

That's Open,single spinner, one wheel peel.

Benelli · 01-24-2010, 04:11 PM

And looks almost recently rebuilt?

powerdriver 1958 · 01-24-2010, 04:15 PM

You may be right,the black haze that generally builds up in the spiders is not there.Do you know any history on it ?

Benelli · 01-24-2010, 09:57 PM

I know no history at all on the rear-diff.

New motor a few years before I bought it and the transfercase was rebuilt and it was painted. He didn't mention anything about it. There was a huge shear or scratch looking thing inside the differential that looked like it shoudln't have been there, almost like something broke and flew off?

01-12-2010, 11:50 PM	#1
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	confused. differentials I was hoping someone could help me with this. If I take off from a stop light, real quick like it'll let one tire loose. If I'm stuck in the mud/snow and romp on it, it'll spin both tires, hell it'll spin all 4 and look pretty sweet. This is all on a 1979 K10, I don't understand why it will spin both tires on say ice but it'll do the one-wheel-peel on the dry stuff. Can someone explain this to me? __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

01-13-2010, 12:06 AM	#2
onlyifihadachevy Registered User Join Date: Mar 2009 Location: seaside,ca Posts: 778	Re: confused. differentials I'm assuming when in the mud and snow your stuck by the way of high centering. So no tires are touching the ground. And on the dry stuff one tire is planted on the ground, the other is spinning unable to get traction. __________________ 72 gmc 2500 2wd drive convert My 72 thread http://67-72chevytrucks.com/vboard/s...d.php?t=346712 THe other truck, wheeler 69 1/2 4x4, yellow and rusty. http://67-72chevytrucks.com/vboard/s...d.php?t=350300

01-13-2010, 01:28 AM	#3
1970GMC468 Registered User Join Date: Jan 2008 Location: Orland, California Posts: 72	Re: confused. differentials Open diffs will occasionally spin in the loose stuff if the truck is straight and everything is perfect. If you have a posi traction rear end it is possible that the clutches are worn out and not grabbing well on the dry stuff. Just my two cents.

01-13-2010, 11:18 AM	#4
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: confused. differentials Yup, open diff or worn limitedslip/posi Take the rear cover off and see what is in there, If you need help identifying it snap a pic and post it up. __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

01-13-2010, 04:16 PM	#5
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: confused. differentials Will do, thanks guys. __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

01-24-2010, 02:31 PM	#6
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: confused. differentials Open? __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

01-24-2010, 03:19 PM	#7
powerdriver 1958 Kid's Mechanic Join Date: Nov 2006 Location: Kansas City Posts: 8,241	Re: confused. differentials That's Open,single spinner, one wheel peel.

01-24-2010, 04:11 PM	#8
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: confused. differentials And looks almost recently rebuilt? __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

01-24-2010, 04:15 PM	#9
powerdriver 1958 Kid's Mechanic Join Date: Nov 2006 Location: Kansas City Posts: 8,241	Re: confused. differentials You may be right,the black haze that generally builds up in the spiders is not there.Do you know any history on it ?

01-24-2010, 09:57 PM	#10
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: confused. differentials I know no history at all on the rear-diff. New motor a few years before I bought it and the transfercase was rebuilt and it was painted. He didn't mention anything about it. There was a huge shear or scratch looking thing inside the differential that looked like it shoudln't have been there, almost like something broke and flew off? __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold



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