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: 418
Size: 38.0 KB

Name: explosion[1].jpg
Views: 418
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.

'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.

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.

bigblock79 · 11-05-2007, 09:15 AM

Code:

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.

that is true.

but they are better then any clutch type set up. you give it some gas and they are locked. i run 295-50-15 and it does squeal my tires in a tight parking lot. i can get in and out of places that most 2wdrive cant go. i live on a hill and when my grass is wet it will pull right out with out spinning a tire.

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.

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.

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.

11-04-2007, 04:04 AM	#10
'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.

11-05-2007, 06:24 AM	#12
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

11-05-2007, 09:15 AM	#13
bigblock79 67 Chevy Stepside Join Date: Mar 2007 Location: Jonesville NC Posts: 836	Re: Help buying posi unit. Code: 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. that is true. but they are better then any clutch type set up. you give it some gas and they are locked. i run 295-50-15 and it does squeal my tires in a tight parking lot. i can get in and out of places that most 2wdrive cant go. i live on a hill and when my grass is wet it will pull right out with out spinning a tire. __________________ 1967 Chevy stepside 1976 BIG DOOLEY 454 turbo 400 4:11 Last edited by bigblock79; 11-05-2007 at 09:16 AM. Reason: spelling

11-05-2007, 09:20 AM	#14
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	#15
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	#16
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.

11-21-2007, 12:27 AM	#18
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



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