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03-17-2012, 06:18 PM
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#1 |
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Registered User
Join Date: Oct 2010
Location: lowell, in
Posts: 271
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pinion nut
hey im looking for the tourqe spec. on the pinion nut on the rear end..i cant remember yes im getting old.
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03-17-2012, 08:40 PM
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#2 |
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Registered User
Join Date: Jan 2006
Location: Cherry Valley,Ca
Posts: 468
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Re: pinion nut
What kind of rear end? If its a 12 bolt there really is no spec, just tight enough to preload the pinion bearings correctly.
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03-18-2012, 12:24 AM
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#3 |
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18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
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Re: pinion nut
You need a rotating torque spec.
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... 
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03-18-2012, 02:48 AM
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#4 |
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Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: pinion nut
^ x2
The in-lbs of rotational effort required is different for new bearings and used bearings too. You really need a dial indicator type inch-pound torque wrench to do it properly.
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miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
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03-18-2012, 02:53 PM
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#5 |
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Registered User
Join Date: Oct 2010
Location: lowell, in
Posts: 271
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Re: pinion nut
12 bolt 1/2 ton posi..new bearings..i know the crush sleeve has to crush but..i dont want to over tighten...
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my build thread -- (http://67-72chevytrucks.com/vboard/s...d.php?t=438604) |
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03-18-2012, 03:41 PM
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#6 |
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425hp409
 
Join Date: Oct 2008
Location: Prosper Texas
Posts: 841
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Re: pinion nut
The proper way to do it is to have a beam type torque wrench that goes in small increments, 1/4 or 3/8" drive, so that you can read 5 inch pounds of rotating torque. To get an accurate reading make sure that the pinion races are seated ALL the way and the bearings are lubes with oil.
First you tighten the pinion nut so that the slack in the pinion is just taken up. Then tighten the nut a little at a time, measuring the rotating torque after each tightening, until you get the 5 inch pounds of rotating torque. You are then done. The crush sleeve is now "crushed" and has the proper load on the pinion bearings. Posted via Mobile Device
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Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette |
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03-18-2012, 06:12 PM
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#7 |
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Registered User
Join Date: Aug 2009
Location: St. Paul MN.
Posts: 1,996
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Re: pinion nut
15 in lb used bearings 25 in lb new bearings that is rotational force
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