WTB: 12bolt Posi for 72 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

PR454SS · 01-10-2004, 02:33 PM

Need posi unit for a 72 12 bolt shipped to 37777

jacquesdean · 01-10-2004, 11:26 PM

I have one that is on a 72 cheyenne, I'm driving Up I 75 next week from Chatenooga to Detroit.

$300.00

PR454SS · 01-11-2004, 04:20 AM

is that the posi unit or the whole rearend forgive the dumb question but I don't know what they cost used

jacquesdean · 01-11-2004, 12:06 PM

That is the whole rear end complete

jmanz69 · 01-11-2004, 01:17 PM

That's cheaper than buying a Posi unit, and having it set up for you. This way all you have to do is bleed the brakes and go. A new Posi will run oyu $250-375 depending on where you get it. Then about $200 to set it up. You can try it yourself, but I would suggest against it. Unless you have all the right tools, and knowledge, you can really mess up your gears and then you are back to paying someone to do it.

PR454SS · 01-11-2004, 01:25 PM

What is the gear ratio on it, if it is a 3:73 I must have done something right yesterday!

jmanz69 · 01-11-2004, 01:46 PM

it will most likely be a 3.08 or 3.73. The only way to find out is to open it up. Jock will probably do that for you. He is a great guy to deal with. It will be stamped on the ring gear in a xx:xx format. Then just divide it and you get your ratio.

01-10-2004, 02:33 PM	#1
PR454SS Registered User Join Date: Aug 2003 Location: Louisville, TN Posts: 338	WTB: 12bolt Posi for 72 Need posi unit for a 72 12 bolt shipped to 37777 __________________ PR Too many projects, not enough time! 72SWB 350/350TH, 3500stall,525 lift cam 3:73 posi. Sold! 69LWB Flatbed 350/Super T-10, ported/polished 481 heads, 480 lift cam. 78SWB 468/400TH, ported/polished Alum. heads, 3:42 posi, 3000 stall on 17x8 and 18x9.5's 77 Jeep CJ-5 304V8 fiberglass body on 36" Ground Hawgs

01-10-2004, 11:26 PM	#2
jacquesdean Registered User Join Date: Jan 2003 Location: Snead, Alabama Posts: 399	re: posi I have one that is on a 72 cheyenne, I'm driving Up I 75 next week from Chatenooga to Detroit. $300.00 __________________ Jock, Powder blasting shop, Alabama

01-11-2004, 04:20 AM	#3
PR454SS Registered User Join Date: Aug 2003 Location: Louisville, TN Posts: 338	is that the posi unit or the whole rearend forgive the dumb question but I don't know what they cost used __________________ PR Too many projects, not enough time! 72SWB 350/350TH, 3500stall,525 lift cam 3:73 posi. Sold! 69LWB Flatbed 350/Super T-10, ported/polished 481 heads, 480 lift cam. 78SWB 468/400TH, ported/polished Alum. heads, 3:42 posi, 3000 stall on 17x8 and 18x9.5's 77 Jeep CJ-5 304V8 fiberglass body on 36" Ground Hawgs

01-11-2004, 12:06 PM	#4
jacquesdean Registered User Join Date: Jan 2003 Location: Snead, Alabama Posts: 399	re: Posi That is the whole rear end complete __________________ Jock, Powder blasting shop, Alabama

01-11-2004, 01:25 PM	#6
PR454SS Registered User Join Date: Aug 2003 Location: Louisville, TN Posts: 338	What is the gear ratio on it, if it is a 3:73 I must have done something right yesterday! __________________ PR Too many projects, not enough time! 72SWB 350/350TH, 3500stall,525 lift cam 3:73 posi. Sold! 69LWB Flatbed 350/Super T-10, ported/polished 481 heads, 480 lift cam. 78SWB 468/400TH, ported/polished Alum. heads, 3:42 posi, 3000 stall on 17x8 and 18x9.5's 77 Jeep CJ-5 304V8 fiberglass body on 36" Ground Hawgs

01-11-2004, 01:17 PM	#5
jmanz69 Careful, they attack... Join Date: Aug 2001 Location: Waterford, MI, USA Posts: 1,107	That's cheaper than buying a Posi unit, and having it set up for you. This way all you have to do is bleed the brakes and go. A new Posi will run oyu $250-375 depending on where you get it. Then about $200 to set it up. You can try it yourself, but I would suggest against it. Unless you have all the right tools, and knowledge, you can really mess up your gears and then you are back to paying someone to do it.

01-11-2004, 01:46 PM	#7
jmanz69 Careful, they attack... Join Date: Aug 2001 Location: Waterford, MI, USA Posts: 1,107	it will most likely be a 3.08 or 3.73. The only way to find out is to open it up. Jock will probably do that for you. He is a great guy to deal with. It will be stamped on the ring gear in a xx:xx format. Then just divide it and you get your ratio.



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