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07-26-2009, 08:53 PM
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#1 |
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Registered User
 
Join Date: Dec 2008
Location: Providence Rhode Island
Posts: 404
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12 bolt
I have a 12 bolt out of a 1969 truck with 3.73 gears. I am putting it in my truck with a TH400 with a manual valve body. I will eventually build a 6.0 that makes 500 - 550 torque for the truck. Will the 12 bolt be able to take the abuse? The truck will mostly see street use with occasional runs at the track. I've heard that the pinion shafts are smaller than the cars and break quite easily. I intend to use good Moser axles and a C clip eliminator kit if I use the 12 bolt. Thanks for any input.
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07-26-2009, 09:18 PM
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#2 |
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Registered User
Join Date: Oct 2006
Location: bridgecreek ok.
Posts: 1,214
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Re: 12 bolt
mines holding up. I changed to 33 spline moser axles with c-clip eliminators and a full spool.
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http://67-72chevytrucks.com/vboard/s...d.php?t=494388 431 big block times, changed to a 6.0 ls with turbo 1.58- 60' 7.18- 1/8th mile@95.18 11.37- 1/4 @115.81 |
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08-02-2009, 08:52 PM
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#3 |
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Junior Member
Join Date: Sep 2003
Location: yreka, ca
Posts: 270
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Re: 12 bolt
Are the c-clip eliminaters the same for the truck 12 bolt as the car 12 bolt?
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63 C10 70 Coronet R/T 67 C10 70 Dart Swinger 71 K10 |
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08-02-2009, 09:07 PM
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#4 |
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Mean Green
Join Date: Sep 2007
Location: Portland, OR
Posts: 522
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Re: 12 bolt
I have the 35 spline spool and axle package from Moser leaving on a trans break. They have held up fine. About the ring and Pinion you can use a car gear in truck Housing but it takes conversion bearings. I believe randy's ring and pinion has all the numbers.
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08-02-2009, 10:10 PM
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#5 |
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Junior Member
Join Date: Sep 2003
Location: yreka, ca
Posts: 270
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Re: 12 bolt
Good info. I'll probobly go with a posi instead of a spool so I can keep the truck streetable.
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63 C10 70 Coronet R/T 67 C10 70 Dart Swinger 71 K10 |
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08-07-2009, 05:10 PM
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#6 |
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Mean Green
Join Date: Sep 2007
Location: Portland, OR
Posts: 522
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Re: 12 bolt
Oh come on, I drive mine all over town down the free way w/ 28x13.5 M/T
LOL cool good luck. I recommend the Moroso unit or Eaton. They bite hard but plenty of street ability. Last edited by 68 C-10 KID; 08-07-2009 at 05:12 PM. |
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08-08-2009, 06:03 AM
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#7 |
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Registered User
Join Date: Jul 2005
Location: Kernersville, NC
Posts: 599
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Re: 12 bolt
Mark Williams is makin a 33 spline posi so you can run stronger axles. Its for a car 12 bolt but I think it should work in a truck. Chris.
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its a work in progess. 71 c-10 lwb, in the middle of frame off restoration. 69 c-10 swb, drag truck, 406 sbc, balanced, comp 292 cam, ported, polished, gasket matched, and bowl blended pro comp 210cc heads, 2.02/1.60 ferrea valves,1.6 roller rockers, re curved hei with msd 6al box, 2-step rev limter, accel 300+ wires, ported victor jr intake, holley 750 double pumper carb, dynomax 1 5/8 headers, 4 spd munci m-20 with super case and iron midplate, mr. gasket vertigate shifter, 5.38 pro gears with full spool, 33 spline moser axles and c-clip elimators, line-loc, 5 gal fuel cell, holley blue pump.   7.807 @ 88.37mph 1.60 60FT 80 g-20 van, tow rig, cammed 305, th350, 10 bolt 88 jeep wrangler, dd, 258, ax-15 swap, 4.5" lift, 33x12.50's, lockers, 3.55's |
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