Rear diff tricks??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Ironangel** · 02-26-2010, 02:20 AM

Howdy folks,well one thin leads to another! Im making steady progress towards the poor house and divorce on this 72 Chevy C-10 LWB. Before I install the new brake cylinders I thought I may as well see about axle seals,yoke seal(which is wet with oil)and cover gasket. My question is; Can these 12 bolt rear ends be made into a limited slip or positrac type rearend? Or do you have switchout the whole rear end for another type? I seem to remember a kit that installed and would lock both axles. Input? Ideas? Thanks you guys!

hotrod 80 · 02-26-2010, 05:15 AM

The 12 bolt truck 8.875 axle has a pretty good aftermarket following as far as posi/locker selection goes . No need to swap the entire axle . The eaton posi seems to be well liked .

72armyswbtruck · 02-26-2010, 05:33 AM

Yes the eaton posi works great, a little pricey for my blood.

cdowns · 02-26-2010, 08:21 AM

best "trick" i know of with rears is to have money and drop off at a shop for rebuild then pick it up in a day or so

**Ironangel** · 02-26-2010, 02:11 PM

Farout! Thanks guys,Im going to eatons website now

hayhauler71 · 02-26-2010, 02:26 PM

http://www.summitracing.com/parts/PWT-1910-LR/ I used one like this and works great and takes less than 1 hour to install.

**leddzepp** · 02-26-2010, 02:40 PM

Click on my build link below. I recently changed all the seals and gasket on my rear axle.

epashhans · 02-26-2010, 03:06 PM

Quote:

Originally Posted by hayhauler71

http://www.summitracing.com/parts/PWT-1910-LR/ I used one like this and works great and takes less than 1 hour to install.

I have looked at that before. You said you used one like it...do you know which one? Under the applications listed it doesn't show a 67 c-10, which is what I have, but I would like to find something like this.

hayhauler71 · 02-26-2010, 03:52 PM

Quote:

Originally Posted by epashhans

I have looked at that before. You said you used one like it...do you know which one? Under the applications listed it doesn't show a 67 c-10, which is what I have, but I would like to find something like this.

Call Richmond gear for your application mine was a 12 bolt in my 71

BossHogg69 · 02-26-2010, 04:08 PM

Quote:

Originally Posted by cdowns

best "trick" i know of with rears is to have money and drop off at a shop for rebuild then pick it up in a day or so

x2 on that - just tell them what ratio you want and what diff. Eatons are good, but kinda pricey, I had an Auburn 'High Performance' LSD in my '92 C1500 w/ 10 bolt and it worked great. I would recommend it, and the price is good too. I got mine through Jeg's, but had the rearend with new 3.73 gears professionally set up.

big_al_71 · 02-26-2010, 04:36 PM

We just redid the complete rear end in my truck. It came out perfect and it definetly has held up nicely, no noise...highly reccomended!!!!!

nuke1 · 02-26-2010, 04:42 PM

I got 3.73 Richmond gears with a Detroit True Trac locker

grs · 02-26-2010, 05:01 PM

I thought 12 bolt rear ends were positrac. My 69 has a 12 bolt , and it is a positrac.

dirtball · 02-26-2010, 06:00 PM

Quote:

Originally Posted by grs

I thought 12 bolt rear ends were positrac. My 69 has a 12 bolt , and it is a positrac.

Some are, most are not.

02-26-2010, 02:20 AM	#1
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Rear diff tricks??? Howdy folks,well one thin leads to another! Im making steady progress towards the poor house and divorce on this 72 Chevy C-10 LWB. Before I install the new brake cylinders I thought I may as well see about axle seals,yoke seal(which is wet with oil)and cover gasket. My question is; Can these 12 bolt rear ends be made into a limited slip or positrac type rearend? Or do you have switchout the whole rear end for another type? I seem to remember a kit that installed and would lock both axles. Input? Ideas? Thanks you guys! Last edited by Ironangel; 02-26-2010 at 02:21 AM.

02-26-2010, 05:15 AM	#2
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: Rear diff tricks??? The 12 bolt truck 8.875 axle has a pretty good aftermarket following as far as posi/locker selection goes . No need to swap the entire axle . The eaton posi seems to be well liked . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

02-26-2010, 05:33 AM	#3
72armyswbtruck Registered User Join Date: Feb 2004 Location: Idaho Posts: 4,034	Re: Rear diff tricks??? Yes the eaton posi works great, a little pricey for my blood. __________________ "Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!"

02-26-2010, 08:21 AM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Rear diff tricks??? best "trick" i know of with rears is to have money and drop off at a shop for rebuild then pick it up in a day or so __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

02-26-2010, 02:11 PM	#5
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Re: Rear diff tricks??? Farout! Thanks guys,Im going to eatons website now

02-26-2010, 02:26 PM	#6
hayhauler71 Registered User Join Date: Aug 2009 Location: St. Paul MN. Posts: 1,996	Re: Rear diff tricks??? http://www.summitracing.com/parts/PWT-1910-LR/ I used one like this and works great and takes less than 1 hour to install.

02-26-2010, 02:40 PM	#7
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,005	Re: Rear diff tricks??? Click on my build link below. I recently changed all the seals and gasket on my rear axle. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man

02-26-2010, 04:36 PM	#11
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: Rear diff tricks??? We just redid the complete rear end in my truck. It came out perfect and it definetly has held up nicely, no noise...highly reccomended!!!!! Attached Images __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild Last edited by big_al_71; 02-26-2010 at 04:37 PM.

02-26-2010, 04:42 PM	#12
nuke1 Registered User Join Date: Jun 2007 Location: Saskatoon, Saskatchewan,: Posts: 2,901	Re: Rear diff tricks??? I got 3.73 Richmond gears with a Detroit True Trac locker __________________ James 1968 GMC "HAVOC" 1986 GMC "Frank" J.J.R.H. Design & Consulting My 68`Rebuild "HAVOC": http://67-72chevytrucks.com/vboard/s...d.php?t=316300 A 58' chev build thread: http://www.67-72chevytrucks.com/vboa...d.php?t=311238 1969 Camaro Pro Touring http://67-72chevytrucks.com/vboard/s...61#post3513361 Swiss Cheese: http://67-72chevytrucks.com/vboard/s...d.php?t=384390 Adjustable Trailing Arm How-To: http://67-72chevytrucks.com/vboard/s...d.php?t=321100 1968 Ford Farm Truck: http://67-72chevytrucks.com/vboard/s...=1#post6555587

02-26-2010, 05:01 PM	#13
grs Registered User Join Date: Jan 2010 Location: Roanoke, Tx. Posts: 1,561	Re: Rear diff tricks??? I thought 12 bolt rear ends were positrac. My 69 has a 12 bolt , and it is a positrac.



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