Need help picking a posi - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevyman8 · 10-07-2009, 08:00 AM

I picked up a 12 bolt rear the other day that I'm going to drop 3.73 gears into. I also want a posi, but I know what to get. My '84 is my daily driver that is also taken to the track. What's a good posi to drop in it? What are you guys runnin?

**americanmusc1e** · 10-08-2009, 03:06 PM

I'm runnin' an open differential and in need of a posi (and gears) too......subscribed

Outlaw72 · 10-08-2009, 03:06 PM

Quote:

Originally Posted by chevyman8

I picked up a 12 bolt rear the other day that I'm going to drop 3.73 gears into. I also want a posi, but I know what to get. My '84 is my daily driver that is also taken to the track. What's a good posi to drop in it? What are you guys runnin?

I have an Auburn in mine.....it has held up very well. I shattered the rear in my truck launching on the bottle almost 2 years ago and that is the only part I did not have to replace. Still going strong..

AirMale · 10-08-2009, 07:05 PM

I've had both Eaton and Auburn and prefer the Eaton. Eaton is rebuildable and hooks straighter.

BossHogg69 · 10-08-2009, 08:37 PM

I put an Auburn in my a DD '92 C1500 5.7/5 spd that I took to the track every now and then. I liked it because it was smooth and didn't make any noise. I had 3.73's, Lakewood traction bars and a 4" rear drop and it hooked pretty good.

chevyman8 · 10-08-2009, 09:29 PM

I appreciate the input. How about gears? I heard Richmonds whine and break a lot. I was told Motive gears are the way to go.

BossHogg69 · 10-08-2009, 10:25 PM

i used Yukon gears in my '92 when I put in the Auburn. they were quiet too, and I never had any problems out of them either. I've never used Motive or Richmond.

ProStreet71 · 10-08-2009, 10:40 PM

If set up properly, gears should not whine regardless of manufacterer.

wheatlandbrawler · 10-09-2009, 12:03 AM

Quote:

Originally Posted by ProStreet71

If set up properly, gears should not whine regardless of manufacterer.

couldnt agree more... and i run richmond's in my 8 second malibu.... nver had a problem.

Marv D · 10-09-2009, 01:17 PM

Quote:

Originally Posted by AirMale

I've had both Eaton and Auburn and prefer the Eaton. Eaton is rebuildable and hooks straighter.

Ditto, I would prefer to spend the few extra bucks to get the better unit. You will get a little clutch chatter accelerating through sharp corners without the L.S. additive, but it eases as the clutches break in.

I did break a set of Richmond street gears transbrake launching in the 3380 pound truck running low 12's, but have never had a seconds issue with the Richmond 9" Pro gear run in my low 9second Nova. I don't know if it's design or case flex but I have heard of more gears breaking in the GM 12bolt housing than the other popular differential cases (Dane & 9" ).

CreditGod · 10-21-2009, 01:43 AM

call peyton performance out of texas he builds rear ends for all of the big boys in the south he will shoot you straight

I have an auburn in mine.

hope this helps

10-07-2009, 08:00 AM	#1
chevyman8 Registered User Join Date: Feb 2008 Location: blanchard, ok Posts: 30	Need help picking a posi I picked up a 12 bolt rear the other day that I'm going to drop 3.73 gears into. I also want a posi, but I know what to get. My '84 is my daily driver that is also taken to the track. What's a good posi to drop in it? What are you guys runnin?

10-08-2009, 03:06 PM	#2
americanmusc1e Senior Member Join Date: Jan 2009 Location: Austin, TX Posts: 1,079	Re: Need help picking a posi I'm runnin' an open differential and in need of a posi (and gears) too......subscribed __________________ -- Josh Instagram: @americanmusc1e OLD SKOOL-- 1970 C10. 454/Th400/3.07 posi Build Thread FARM TRUCK----1949 Chevrolet 3800 Power Wagon Hauler Build Thread 1999 4wd OBS Tahoe - daily. DM me if you can't see photos i posted

10-08-2009, 07:05 PM	#4
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	Re: Need help picking a posi I've had both Eaton and Auburn and prefer the Eaton. Eaton is rebuildable and hooks straighter. __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

10-08-2009, 08:37 PM	#5
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Re: Need help picking a posi I put an Auburn in my a DD '92 C1500 5.7/5 spd that I took to the track every now and then. I liked it because it was smooth and didn't make any noise. I had 3.73's, Lakewood traction bars and a 4" rear drop and it hooked pretty good. __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!!

10-08-2009, 09:29 PM	#6
chevyman8 Registered User Join Date: Feb 2008 Location: blanchard, ok Posts: 30	Re: Need help picking a posi I appreciate the input. How about gears? I heard Richmonds whine and break a lot. I was told Motive gears are the way to go.

10-08-2009, 10:25 PM	#7
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Re: Need help picking a posi i used Yukon gears in my '92 when I put in the Auburn. they were quiet too, and I never had any problems out of them either. I've never used Motive or Richmond. __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!!

10-08-2009, 10:40 PM	#8
ProStreet71 Registered User Join Date: Sep 2008 Location: Huntingdon,TN Posts: 95	Re: Need help picking a posi If set up properly, gears should not whine regardless of manufacterer.

10-21-2009, 01:43 AM	#11
CreditGod Registered User Join Date: Dec 2008 Location: dallas, texas Posts: 90	Re: Need help picking a posi call peyton performance out of texas he builds rear ends for all of the big boys in the south he will shoot you straight I have an auburn in mine. hope this helps

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.