12 bolt Auburn posi units ID, pro vs. street - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**crossy** · 07-29-2007, 12:05 PM

Other than an obvious part number , that they DON"T have on them. does anyone here know how to ID an auburn PRO series Diff from the standard Auburn limited slip diff.

I'm trying to ID all the posi units i have laying here and I remember buying this one used for another one of my pipe dreams but i do not want to mis-advertise the unit.
please hold all your personal Auburn 'hate'comments as i have seen/heard them all.

I already went to the Auburn website and the pic is the same. my GUESS is that there is some color code on the springs for preload rating that would be the only difference?
thanx,crossy

**oldiron** · 07-30-2007, 02:49 AM

crossy did you really want this in the Suburban forum or some other forum. Let me know where you want it and I will move it for you.
Oldiron forum staff

**crossy** · 07-30-2007, 05:50 AM

meant to hit the 67-72 pickups forums. still trying to get used to many things on this new PC including the 'views' of forums. thanx,crossy

**oldiron** · 07-31-2007, 12:26 AM

I'll move it over for you then.

07-29-2007, 12:05 PM	#1
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	12 bolt Auburn posi units ID, pro vs. street Other than an obvious part number , that they DON"T have on them. does anyone here know how to ID an auburn PRO series Diff from the standard Auburn limited slip diff. I'm trying to ID all the posi units i have laying here and I remember buying this one used for another one of my pipe dreams but i do not want to mis-advertise the unit. please hold all your personal Auburn 'hate'comments as i have seen/heard them all. I already went to the Auburn website and the pic is the same. my GUESS is that there is some color code on the springs for preload rating that would be the only difference? thanx,crossy __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.

07-30-2007, 02:49 AM	#2
oldiron Designated Grumpy Old Man Join Date: Oct 2001 Location: arlington, washington usa Posts: 3,094	Re: 12 bolt Auburn posi units ID, pro vs. street crossy did you really want this in the Suburban forum or some other forum. Let me know where you want it and I will move it for you. Oldiron forum staff __________________ Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg

07-30-2007, 05:50 AM	#3
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	Re: 12 bolt Auburn posi units ID, pro vs. street meant to hit the 67-72 pickups forums. still trying to get used to many things on this new PC including the 'views' of forums. thanx,crossy __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.

07-31-2007, 12:26 AM	#4
oldiron Designated Grumpy Old Man Join Date: Oct 2001 Location: arlington, washington usa Posts: 3,094	Re: 12 bolt Auburn posi units ID, pro vs. street I'll move it over for you then. __________________ Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg

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