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11-18-2012, 09:52 AM
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#1 |
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Registered User
Join Date: Sep 2012
Location: Lincoln, NE
Posts: 26
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69 GMC 12 Bolt
I've got a 69 GMC C15 with a 12 bolt rearend what is the best option for making it posi? It is used mainly for cruising but I plan to take it to the drag strip occasionally. Thank you for your input.
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11-18-2012, 07:09 PM
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#2 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Re: 69 GMC 12 Bolt
Eaton unit....you did not state the gear, but hear goes....2.73-3.42 (3 series carrier) . 3.73, & slower gears(4.10,4.56, ect), 4 series on the carrier.
 crazyL
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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.... |
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11-18-2012, 07:43 PM
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#3 |
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Registered User
Join Date: Feb 2006
Location: Smyrna, Ga
Posts: 1,647
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Re: 69 GMC 12 Bolt
X2 on eaton. I put a trutrac in mine with 4.10's. you dont know its there until its smokey burnout time or when the roads are wet.
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11-19-2012, 12:57 AM
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#4 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,254
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Re: 69 GMC 12 Bolt
X3 on the Eaton.......
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11-19-2012, 08:49 AM
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#5 |
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Registered User
Join Date: Sep 2012
Location: Lincoln, NE
Posts: 26
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Re: 69 GMC 12 Bolt
Found a Detroit EZ locker for sale for $100 would that be a good option or should I buy a new Trutrac?
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