What rearend are you running - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMCGRANDS · 12-27-2002, 03:26 PM

Im getting close to the point of working on my rearend and was wondering what others are running with higher horse applications. Beefed up 12 bolt truck, 9 inch Ford, Dana 60 or others. Concerned about c-clips and hear c-clip eliminators leak. Im running a early classics 4/6 drop so I dont have to worry about the panhard (trackbar) mount on the axle housing. Has anyone found another application the right length ?

**1971Stepside** · 12-27-2002, 03:28 PM

I am using the 4/6 drop with my stock 12bolt and a new 3.73 Ring and Pinion/Eaton Posi unit. I plan on having around 400hp when the motor is finally bought. From what I have read and from the conversations with local shops the 12bolt is great for street use and this kind of HP.

crazy longhorn · 12-27-2002, 03:40 PM

12 bolt, with eaton posi/4.10 Richmond gears. i am running in the 400hp range with my 383(street driven). I dont think you will have to worry about braking it, unless you are running slicks& really hooking up hard. I have been told that the C clip eliminators are not the best for street use(they tend to be leak prone), & need a lot of maintainance.

mikep · 12-27-2002, 08:12 PM

Dana 60's are readily available in junkyards with performance ratios and with lockers or posi units. Axles can be made to any length . After that its just a matter of having the tubes cut and new ends welded on that accept your brake hardware. Ive built quite a few from boneyard Dana 60's that I didnt have more than $500 in by the time they were done with new hi strength axles , posi units and 4.11 gears. No c clips to worry about either.

GMCGRANDS · 12-28-2002, 12:58 AM

Crazy Longhorn and 1971 Stepside are you both happy with the Eaton Posi ?

**COBALT** · 12-28-2002, 05:49 AM

Corp. 10 bolt HO72 w/ 3.90s and Detroit Locker. Rebuilt last year.

crazy longhorn · 12-28-2002, 08:46 AM

I dont have any complaints on the eaton unit, mine came from a 73 12 bolt that I swapped a tilt column for. The unit got new plates & springs before I installed it in my truck, so I saved a few bucks going used & doing the labor......

dion · 12-28-2002, 04:17 PM

I'm guessing around 350 HP, Dana 60 with Dana Spicer 3.54

GMCGRANDS · 12-28-2002, 04:34 PM

Any recommendations on board members or prefered rebuilder for rearends ? Preferably in the southeast. I want to change ratios (around 3.73) and add a posi.

12-27-2002, 03:26 PM	#1
GMCGRANDS Registered User Join Date: Jan 2001 Location: Franklin , N.C. USA Posts: 105	What rearend are you running Im getting close to the point of working on my rearend and was wondering what others are running with higher horse applications. Beefed up 12 bolt truck, 9 inch Ford, Dana 60 or others. Concerned about c-clips and hear c-clip eliminators leak. Im running a early classics 4/6 drop so I dont have to worry about the panhard (trackbar) mount on the axle housing. Has anyone found another application the right length ? __________________ Mark 72'GMC Sierra Grande 2wd SWB, Fatman stageV IFS, 6.0 liter LQ4 Gen 3 and 4L80E under construction 05' GMC Sierra Denali LQ9

12-27-2002, 03:28 PM	#2
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,932	I am using the 4/6 drop with my stock 12bolt and a new 3.73 Ring and Pinion/Eaton Posi unit. I plan on having around 400hp when the motor is finally bought. From what I have read and from the conversations with local shops the 12bolt is great for street use and this kind of HP. __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

12-27-2002, 03:40 PM	#3
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	12 bolt, with eaton posi/4.10 Richmond gears. i am running in the 400hp range with my 383(street driven). I dont think you will have to worry about braking it, unless you are running slicks& really hooking up hard. I have been told that the C clip eliminators are not the best for street use(they tend to be leak prone), & need a lot of maintainance. __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

12-27-2002, 08:12 PM	#4
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Dana 60's are readily available in junkyards with performance ratios and with lockers or posi units. Axles can be made to any length . After that its just a matter of having the tubes cut and new ends welded on that accept your brake hardware. Ive built quite a few from boneyard Dana 60's that I didnt have more than $500 in by the time they were done with new hi strength axles , posi units and 4.11 gears. No c clips to worry about either. __________________ No truck :-(

12-28-2002, 12:58 AM	#5
GMCGRANDS Registered User Join Date: Jan 2001 Location: Franklin , N.C. USA Posts: 105	Crazy Longhorn and 1971 Stepside are you both happy with the Eaton Posi ? __________________ Mark 72'GMC Sierra Grande 2wd SWB, Fatman stageV IFS, 6.0 liter LQ4 Gen 3 and 4L80E under construction 05' GMC Sierra Denali LQ9

12-28-2002, 05:49 AM	#6
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Corp. 10 bolt HO72 w/ 3.90s and Detroit Locker. Rebuilt last year. __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

12-28-2002, 08:46 AM	#7
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	I dont have any complaints on the eaton unit, mine came from a 73 12 bolt that I swapped a tilt column for. The unit got new plates & springs before I installed it in my truck, so I saved a few bucks going used & doing the labor...... __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

12-28-2002, 04:17 PM	#8
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	I'm guessing around 350 HP, Dana 60 with Dana Spicer 3.54 __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

12-28-2002, 04:34 PM	#9
GMCGRANDS Registered User Join Date: Jan 2001 Location: Franklin , N.C. USA Posts: 105	Any recommendations on board members or prefered rebuilder for rearends ? Preferably in the southeast. I want to change ratios (around 3.73) and add a posi. __________________ Mark 72'GMC Sierra Grande 2wd SWB, Fatman stageV IFS, 6.0 liter LQ4 Gen 3 and 4L80E under construction 05' GMC Sierra Denali LQ9



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