Help buying posi unit. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

evan · 10-27-2007, 10:33 PM

I need some help figuring out which model I need from Moser. I need to specify spline and carrier.
http://www.moserengineering.com/Page...eatonposi.html

I've got a 12 bolt rear diff and according to their website the 12 bolt truck rear diffs only came with 30 spline. Is that accurate?

I did the "spin the tire and count the revolutions of the drive shaft" test and got 17 in 10 which I think means [(17*0.1)*2]=3.4. According to the Moser sight again, the ratios from 2.76 to 3.42 use the 3 series carrier.

That should mean I need a 3 series carrier and 30 spline unit. Am I right?

BaddBusa2005 · 10-28-2007, 11:17 AM

Quote:

Originally Posted by evan

I need some help figuring out which model I need from Moser. I need to specify spline and carrier.
http://www.moserengineering.com/Page...eatonposi.html

I've got a 12 bolt rear diff and according to their website the 12 bolt truck rear diffs only came with 30 spline. Is that accurate?

I did the "spin the tire and count the revolutions of the drive shaft" test and got 17 in 10 which I think means [(17*0.1)*2]=3.4. According to the Moser sight again, the ratios from 2.76 to 3.42 use the 3 series carrier.

That should mean I need a 3 series carrier and 30 spline unit. Am I right?

www.randyringandpinion.com They know their stuff.

evan · 10-28-2007, 07:46 PM

Quote:

Originally Posted by BaddBusa2005

www.randyringandpinion.com They know their stuff.

Are you sure that link is right?

BaddBusa2005 · 10-28-2007, 08:01 PM

Quote:

Originally Posted by evan

Are you sure that link is right?

sorry about that

www.randysringandpinion.com
www.ringpinion.com

evan · 10-28-2007, 08:11 PM

Quote:

Originally Posted by BaddBusa2005

sorry about that

www.randysringandpinion.com
www.ringpinion.com

Thanks.

**Captkaos** · 11-01-2007, 12:47 PM

12bolts had 30 spline axles. Make sure you get the truck version.

I deal with Randys Ring and Pinion also.

bigblock79 · 11-01-2007, 10:45 PM

i would buy a lock-right locker. i love my

87 STEPPER · 11-02-2007, 06:53 AM

Here's what im running in my truck there's no set up required just install it and haul @ss!

You can run allmost any gear set and you can get them from Jegs or Summit.

There made by Richmond Gear.

I'v had mine about 10 yr's and i love it, and no problems at all only maintenance is if you change your rear end oil also no special friction additives are required.

Heres a exploded view of it.
Name: explosion[1].jpg
Views: 406
Size: 38.0 KB

Name: explosion[1].jpg
Views: 406
Size: 38.0 KB

Nolowrider · 11-02-2007, 11:23 AM

I agree with Bigblock and 87 stepper. That is what I have, love it. No more one tire fryer.

Texasdeere · 11-04-2007, 10:17 PM

Quote:

Originally Posted by 87 STEPPER

Here's what im running in my truck there's no set up required just install it and haul @ss!

You can run allmost any gear set and you can get them from Jegs or Summit.

There made by Richmond Gear.

I'v had mine about 10 yr's and i love it, and no problems at all only maintenance is if you change your rear end oil also no special friction additives are required.

Heres a exploded view of it.
Attachment 311340

I just saw an ad for this today and was wondering about how well it worked and how loud it was. Sounds like what I am looking for. Something I can install myself.

87 STEPPER · 11-05-2007, 06:24 AM

It does make some faint ratcheting noise when you make turns but i only hear it when im going real slow and the radio is low.

But that is normal for this set up.

'83Sierra · 11-04-2007, 04:04 AM

Don't mean to thread jack but i have some stock 3.73 gears from my 01 Silverado and I'm wondering if they'd fit in my 83 sierra? Theyre both 10 bolt.

BaddBusa2005 · 11-20-2007, 11:01 PM

Quote:

Originally Posted by '83Sierra

Don't mean to thread jack but i have some stock 3.73 gears from my 01 Silverado and I'm wondering if they'd fit in my 83 sierra? Theyre both 10 bolt.

I do not think it will work. I could be wrong

bigblock79 · 11-21-2007, 12:27 AM

Powertrax makes the lock right locker

evan · 11-21-2007, 02:07 PM

Quote:

Originally Posted by bigblock79

Powertrax makes the lock right locker

You have the Lock-Right Locker? They also make the one that 87 Stepper showed the picture of.

bigblock79 · 11-05-2007, 09:20 AM

http://www.richmondgear.com/videos/utv.wmv

bigblock79 · 11-05-2007, 09:22 AM

http://www.richmondgear.com/PTRAX2.wmv

evan · 11-20-2007, 10:25 PM

Could you guys clarify which model you're using? I checked http://www.powertrax.com and there is a difference between the one Stepper showed the diagram of (Powertrax Traction System) and the one bigblock79 was referring to (Lock-Right Locker). I'm wondering if it's worth it to pay the higher pricetag for the Powertrax.

10-27-2007, 10:33 PM	#1
evan Registered User Join Date: Jul 2005 Location: SK, Canada Posts: 488	Help buying posi unit. I need some help figuring out which model I need from Moser. I need to specify spline and carrier. http://www.moserengineering.com/Page...eatonposi.html I've got a 12 bolt rear diff and according to their website the 12 bolt truck rear diffs only came with 30 spline. Is that accurate? I did the "spin the tire and count the revolutions of the drive shaft" test and got 17 in 10 which I think means [(170.1)2]=3.4. According to the Moser sight again, the ratios from 2.76 to 3.42 use the 3 series carrier. That should mean I need a 3 series carrier and 30 spline unit. Am I right? __________________ Evan B. Last edited by evan; 10-27-2007 at 10:34 PM.

11-01-2007, 12:47 PM	#6
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: Help buying posi unit. 12bolts had 30 spline axles. Make sure you get the truck version. I deal with Randys Ring and Pinion also. __________________ 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

11-01-2007, 10:45 PM	#7
bigblock79 67 Chevy Stepside Join Date: Mar 2007 Location: Jonesville NC Posts: 836	Re: Help buying posi unit. i would buy a lock-right locker. i love my __________________ 1967 Chevy stepside 1976 BIG DOOLEY 454 turbo 400 4:11

11-02-2007, 06:53 AM	#8
87 STEPPER STILL PLAYS WITH TRUX Join Date: Nov 2002 Location: Melbourne, Fla. Posts: 2,764	Re: Help buying posi unit. Here's what im running in my truck there's no set up required just install it and haul @ss! You can run allmost any gear set and you can get them from Jegs or Summit. There made by Richmond Gear. I'v had mine about 10 yr's and i love it, and no problems at all only maintenance is if you change your rear end oil also no special friction additives are required. Heres a exploded view of it. __________________ ~~Bruce~~ MY 87 STEPPER MY 99 2D/WD TAHOE

11-02-2007, 11:23 AM	#9
Nolowrider Senior Member Join Date: Jan 2005 Location: New Orleans Posts: 1,365	Re: Help buying posi unit. I agree with Bigblock and 87 stepper. That is what I have, love it. No more one tire fryer.

11-05-2007, 06:24 AM	#11
87 STEPPER STILL PLAYS WITH TRUX Join Date: Nov 2002 Location: Melbourne, Fla. Posts: 2,764	Re: Help buying posi unit. It does make some faint ratcheting noise when you make turns but i only hear it when im going real slow and the radio is low. But that is normal for this set up. __________________ ~~Bruce~~ MY 87 STEPPER MY 99 2D/WD TAHOE

11-04-2007, 04:04 AM	#12
'83Sierra Registered User Join Date: Oct 2007 Location: Edmonton, Alberta Posts: 26	Re: Help buying posi unit. Don't mean to thread jack but i have some stock 3.73 gears from my 01 Silverado and I'm wondering if they'd fit in my 83 sierra? Theyre both 10 bolt.

11-21-2007, 12:27 AM	#14
bigblock79 67 Chevy Stepside Join Date: Mar 2007 Location: Jonesville NC Posts: 836	Re: Help buying posi unit. Powertrax makes the lock right locker __________________ 1967 Chevy stepside 1976 BIG DOOLEY 454 turbo 400 4:11

11-05-2007, 09:20 AM	#16
bigblock79 67 Chevy Stepside Join Date: Mar 2007 Location: Jonesville NC Posts: 836	Re: Help buying posi unit. http://www.richmondgear.com/videos/utv.wmv __________________ 1967 Chevy stepside 1976 BIG DOOLEY 454 turbo 400 4:11

11-05-2007, 09:22 AM	#17
bigblock79 67 Chevy Stepside Join Date: Mar 2007 Location: Jonesville NC Posts: 836	Re: Help buying posi unit. http://www.richmondgear.com/PTRAX2.wmv __________________ 1967 Chevy stepside 1976 BIG DOOLEY 454 turbo 400 4:11

11-20-2007, 10:25 PM	#18
evan Registered User Join Date: Jul 2005 Location: SK, Canada Posts: 488	Re: Help buying posi unit. Could you guys clarify which model you're using? I checked http://www.powertrax.com and there is a difference between the one Stepper showed the diagram of (Powertrax Traction System) and the one bigblock79 was referring to (Lock-Right Locker). I'm wondering if it's worth it to pay the higher pricetag for the Powertrax. __________________ Evan B. Last edited by evan; 11-20-2007 at 10:27 PM.



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