LSD, and Posi options - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Duro5341 · 03-21-2007, 04:25 PM

Hey guys

In the next few months I will be in the market for a posi unit

The rear end in my truck is really starting to whine, and I am going to be doing a complete overhaul, and throwing in a posi

The truck will be mainly used for a Daily driver, occasional towing(3-4 times a year), winter driving.....very little off road use. I want something smooth, and automatic....no electronic stuff

I am torn between the clutch, and torsional gear type.......I like the idea of the torsional gear type, and it not wearing out, unlike the clutch type. I take really good care of my truck, and diffs are cleaned and drained every 50,000kms, so maintence is not an issue. I am just looking for something smooth, and easy to drive with

Just wondering what you guys have in, or have heard good/bad about
Any opinions are welcome....I have never had a Posi, and don't know **** about how they feel in the truck

Thanks
Cameron

Duro5341 · 03-21-2007, 05:23 PM

I was also looking at this

http://www.drivetrain.com/4x4.html
14 Bolt Custom Rearend Differential

But I have 2.76 gears, and they don't offer this....but it would be nice to upgrade to a 14 bolt, I know the 10 bolts are weak

Duro

BaddBusa2005 · 03-21-2007, 05:43 PM

i have an auburn pro in my 8.5 and I love it, but i only use my truck to spin tires and race around

84slopwaggin · 03-22-2007, 02:54 AM

I have an Eaton but I've only had it for about a month. It feels the same as the stock open unit, but with the 3.42's it gets upto speed much sooner.

boatpuller · 03-22-2007, 11:19 AM

you guys watch that LSD..as a child of the sixties and seventies.i'm here to tell ya ,there's no future in it.

martinkh · 03-22-2007, 11:28 AM

Unless you exceed tire size (>33"), I'd try the Detroit Tru-Trac. It is clutchless.

I just bought a set of 1 ton axles for my truck, the rear is a 14 bolt gov-loc, but am wary of it. For the 35" tires I will be running, I would prefer the Eaton posi.

BaddBusa2005 · 03-22-2007, 01:00 PM

Quote:

Originally Posted by BaddBusa2005

i have an auburn pro in my 8.5 and I love it, but i only use my truck to spin tires and race around

sorry guys I spoke too soon, it started giving my problems today

84slopwaggin · 03-22-2007, 01:07 PM

What type of problems?

**Captkaos** · 03-22-2007, 04:39 PM

If you are going with a LSD, I would go with the Eaton or the Torsion. I personally wouldn't recommend an Auburn, by design the eat their casing and explode.

Duro5341 · 03-22-2007, 07:38 PM

Quote:

Originally Posted by martinkh

Unless you exceed tire size (>33"), I'd try the Detroit Tru-Trac. It is clutchless.

I just bought a set of 1 ton axles for my truck, the rear is a 14 bolt gov-loc, but am wary of it. For the 35" tires I will be running, I would prefer the Eaton posi.

I was looking at the Detroit Tru-trac one, and I am liking it

there is no special oil required, because it doesn't use clutchs
and there is nothing to wear out.........I like that

I am still debating up grading the rear-end, or keeping the 10 bolt....what do you guys think?. I don't burn tires, and will only be running a max of 32-33" tires in the future. No heavy off roading, or extreme towing.....just a car trailer 3 times a year

Duro

BaddBusa2005 · 03-22-2007, 11:14 PM

Quote:

Originally Posted by 84slopwaggin

What type of problems?

acceleration in a turn, the rear is popping. it is getting worse, and is about time to park it and get the gto out. I am thinking about going with the torsen.

**Captkaos** · 03-22-2007, 11:42 PM

Quote:

Originally Posted by Duro5341

I am still debating up grading the rear-end, or keeping the 10 bolt....what do you guys think?.
Duro

If you're talking about swapping to a 12bolt, then I would say I wouldn't waste my time. The 10 is plent strong for your intended purpose.

84slopwaggin · 03-23-2007, 01:56 AM

I've been told that when they start popping in the turns that it's time to add some LIMITED SLIP ADDITIVE. It's just a small bottle.

Pyrotechnic · 03-23-2007, 10:09 PM

Sometimes you can feel them locking and unlocking in a turn if you're going just the right speed and just the right turning angle which is pretty normal. A loud pop though wouldn't be good.

Duro5341 · 03-24-2007, 08:22 AM

Quote:

Originally Posted by Captkaos

If you're talking about swapping to a 12bolt, then I would say I wouldn't waste my time. The 10 is plent strong for your intended purpose.

Sounds Good, i'll keep my 10 bolt......just give it a complete overhaul

I am going to replace
All bearings, seals, Tru Lock diff, new gears, and pinion shaft....anything I am forgetting?

Thanks for all your help guys
Duro

03-21-2007, 04:25 PM	#1
Duro5341 Registered User Join Date: Dec 2006 Location: Earth Posts: 239	LSD, and Posi options Hey guys In the next few months I will be in the market for a posi unit The rear end in my truck is really starting to whine, and I am going to be doing a complete overhaul, and throwing in a posi The truck will be mainly used for a Daily driver, occasional towing(3-4 times a year), winter driving.....very little off road use. I want something smooth, and automatic....no electronic stuff I am torn between the clutch, and torsional gear type.......I like the idea of the torsional gear type, and it not wearing out, unlike the clutch type. I take really good care of my truck, and diffs are cleaned and drained every 50,000kms, so maintence is not an issue. I am just looking for something smooth, and easy to drive with Just wondering what you guys have in, or have heard good/bad about Any opinions are welcome....I have never had a Posi, and don't know **** about how they feel in the truck Thanks Cameron __________________ -1986 K10 LWB, 350 HD,TH400 3.08, 30 spline 10 bolt, with an Auburn Posi, 31" tires All original, second owner truck -1979 Monte Carlo, 350, 200r4, 3.73 posi -1987 GT T-top Mustang - slow moving project

03-21-2007, 05:23 PM	#2
Duro5341 Registered User Join Date: Dec 2006 Location: Earth Posts: 239	Re: LSD, and Posi options I was also looking at this http://www.drivetrain.com/4x4.html 14 Bolt Custom Rearend Differential But I have 2.76 gears, and they don't offer this....but it would be nice to upgrade to a 14 bolt, I know the 10 bolts are weak Duro __________________ -1986 K10 LWB, 350 HD,TH400 3.08, 30 spline 10 bolt, with an Auburn Posi, 31" tires All original, second owner truck -1979 Monte Carlo, 350, 200r4, 3.73 posi -1987 GT T-top Mustang - slow moving project Last edited by Duro5341; 03-21-2007 at 05:23 PM.

03-21-2007, 05:43 PM	#3
BaddBusa2005 Registered User Join Date: Feb 2006 Location: Cleveland, TN Posts: 440	Re: LSD, and Posi options i have an auburn pro in my 8.5 and I love it, but i only use my truck to spin tires and race around __________________ 1981 Custom Deeluxe SWB 5.3/4L60e 3.73 and Auburn. Mustang Dyno 265hp/258tq

03-22-2007, 02:54 AM	#4
84slopwaggin Registered User Join Date: Apr 2005 Location: Ar Posts: 558	Re: LSD, and Posi options I have an Eaton but I've only had it for about a month. It feels the same as the stock open unit, but with the 3.42's it gets upto speed much sooner. __________________ 85 LWB Chevy 350/350stocker with Hooker headers dual Magnaflow mufflers upgraded rearend with Eaton Posi unit with 3.42 gears needs interior work(now my DD) 96 Silverado Xcab mild drop(SOLD).

03-22-2007, 11:19 AM	#5
boatpuller Registered User Join Date: Sep 2005 Location: Sun City West, Az Posts: 3,822	Re: LSD, and Posi options you guys watch that LSD..as a child of the sixties and seventies.i'm here to tell ya ,there's no future in it. __________________ " Never look up a dead dogs butt."

03-22-2007, 11:28 AM	#6
martinkh Registered User Join Date: Mar 2007 Location: Boise Posts: 107	Re: LSD, and Posi options Unless you exceed tire size (>33"), I'd try the Detroit Tru-Trac. It is clutchless. I just bought a set of 1 ton axles for my truck, the rear is a 14 bolt gov-loc, but am wary of it. For the 35" tires I will be running, I would prefer the Eaton posi. __________________ '70gmc 3/4ton 4X4, re-arch and 2" add-a-leaf lift. '77 400sbc, '82 axles, d60front, 14bolt rear. Probably some 285/75/16 Toyo m/t's on my stock rims coming up.

03-22-2007, 01:07 PM	#8
84slopwaggin Registered User Join Date: Apr 2005 Location: Ar Posts: 558	Re: LSD, and Posi options What type of problems? __________________ 85 LWB Chevy 350/350stocker with Hooker headers dual Magnaflow mufflers upgraded rearend with Eaton Posi unit with 3.42 gears needs interior work(now my DD) 96 Silverado Xcab mild drop(SOLD).

03-22-2007, 04:39 PM	#9
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: LSD, and Posi options If you are going with a LSD, I would go with the Eaton or the Torsion. I personally wouldn't recommend an Auburn, by design the eat their casing and explode. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

03-23-2007, 01:56 AM	#13
84slopwaggin Registered User Join Date: Apr 2005 Location: Ar Posts: 558	Re: LSD, and Posi options I've been told that when they start popping in the turns that it's time to add some LIMITED SLIP ADDITIVE. It's just a small bottle. __________________ 85 LWB Chevy 350/350stocker with Hooker headers dual Magnaflow mufflers upgraded rearend with Eaton Posi unit with 3.42 gears needs interior work(now my DD) 96 Silverado Xcab mild drop(SOLD).

03-23-2007, 10:09 PM	#14
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: LSD, and Posi options Sometimes you can feel them locking and unlocking in a turn if you're going just the right speed and just the right turning angle which is pretty normal. A loud pop though wouldn't be good.



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