How did I strip this shock mount? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

thebeerbaron · 03-04-2018, 08:45 PM

Where did I go wrong?

72 3/4 ton, rear upper shock mount nut (leaf spring). Took the torque spec from this post:
http://67-72chevytrucks.com/vboard/s...9&postcount=16
EDIT TO ADD: Name: Screen Shot 2018-03-04 at 6.09.33 PM.jpg
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Name: Screen Shot 2018-03-04 at 6.09.33 PM.jpg
Views: 165
Size: 28.0 KB

Upper shock mount is 7/16-20. Torque specs for that bolt size are about half the spec above. See http://www.almabolt.com/pages/catalo...ningtorque.htm
EDIT TO ADD: Name: Screen Shot 2018-03-04 at 6.09.43 PM.jpg
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Name: Screen Shot 2018-03-04 at 6.09.43 PM.jpg
Views: 156
Size: 75.2 KB

I completely stripped the upper shock mount stud before I got anywhere near 140ft-lbs. (see attached pic)

Is the GM spec just plain wrong? Should I just be going with the spec-by-bolt-size instead?

Thanks,
Peter

03-04-2018, 08:45 PM	#1
thebeerbaron Registered User Join Date: Aug 2017 Location: San Jose Posts: 6	How did I strip this shock mount? Where did I go wrong? 72 3/4 ton, rear upper shock mount nut (leaf spring). Took the torque spec from this post: http://67-72chevytrucks.com/vboard/s...9&postcount=16 EDIT TO ADD: Upper shock mount is 7/16-20. Torque specs for that bolt size are about half the spec above. See http://www.almabolt.com/pages/catalo...ningtorque.htm EDIT TO ADD: I completely stripped the upper shock mount stud before I got anywhere near 140ft-lbs. (see attached pic) Is the GM spec just plain wrong? Should I just be going with the spec-by-bolt-size instead? Thanks, Peter Attached Images Last edited by thebeerbaron; 03-04-2018 at 10:12 PM. Reason: Added pics to supplement links



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