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05-13-2013, 10:14 AM
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#1 |
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Registered User
Join Date: Jul 2009
Location: PA
Posts: 406
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1987 Rear swap help
Need some help. I have a 1987 chevy R10 10 bolt 5 lug rear and I want to swap it out with a 1976 Chevy 12 bolt 5 lug rear out of a C10.
Can anyone tell me the U Joint spec sizes for these? I am coming up with the dimensions but not the diameter of the caps. 1987 - 1.13X1.13 2.37 x 2.37 outer 1976- 1.06x1.06 3.22X3.22 outer I am assuming this are not interchangable and I will need a special u joint for them...
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2013 Chevy Silverado, Z71, 5.3L, 4 door 2005 Chevy Silverado, Z71, 5.3L, 4 door, 3.40 Support the Troops. 
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05-13-2013, 06:39 PM
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#2 |
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Registered User
Join Date: Mar 2006
Location: kearney,nebraska
Posts: 443
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Re: 1987 Rear swap help
there is a conversion u-joint (precision is #372, spicer is 5-3022x ) you'll need .you will also need a longer driveshaft i believe, like an inch
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'70 k-10 longbox- mid 70's drivetrain 350/350 487x heads 10.1:1 flowmasters ,35's 3.73's auburn posi ,rear shackle flip. '72 short stepside U.S. forestry truck, '73 455 buick,400 turbo,dropped 2"-4 1/4" ,3.07 posi,:'89 silverado 1500 ,OK truck ,5.7 holley tbi ,trick 700r4 3.07 auburn posi ,and my '66 skylark ,'73 centurion and my '84 monte carlo imca stock car |
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05-15-2013, 12:35 PM
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#3 |
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Registered User
Join Date: Jul 2009
Location: PA
Posts: 406
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Re: 1987 Rear swap help
hmm
that stinks. I thought these were drop ins for the 1/2 ton trucks. Thanks for letting me know.
__________________
2013 Chevy Silverado, Z71, 5.3L, 4 door 2005 Chevy Silverado, Z71, 5.3L, 4 door, 3.40 Support the Troops.
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