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Pinion Snubber Install Torque Spec

Posted By: Ghoste

Pinion Snubber Install Torque Spec - 03/02/23 10:48 AM

Is there a torque spec for the mounting bolts on the stock pinion snubber attachment plate? I dont see one in the fsm anywhere.
Posted By: moparx

Re: Pinion Snubber Install Torque Spec - 03/02/23 06:03 PM

the typical grade 5, 3/8-16 thread can be torqued to 25-30ftlbs.
basically as tight as you can using a 3/8 drive ratchet or standard length box wrench.
beer
Posted By: Ghoste

Re: Pinion Snubber Install Torque Spec - 03/02/23 07:25 PM

Thank you.
Posted By: 1969ronnie

Re: Pinion Snubber Install Torque Spec - 03/03/23 12:14 AM

wave Hi Ghost , Factory Service Manual , Section 16 Propellor Shafts and Universal Joints Section . Tightening Reference , Pinion Bumper Plate Screws 7- 1/4 Axle 150 INCH Pounds . Pinion Bumper Plate Screws for 8.75 Axle , 9-1/4 Axle , and the 9 - 3/4 DANA 60 Axle , 200 INCH Pounds Per Factory Service Manual ! drive Hope this Helps , Ronnie wrench
Posted By: Ghoste

Re: Pinion Snubber Install Torque Spec - 03/03/23 10:12 AM

Ah, prop shaft was a section I didnt think to look. I tried axle and rear suspension. Thanks. (looks like I have them overtightened as I went with the 25 lbs)
Posted By: Sniper

Re: Pinion Snubber Install Torque Spec - 03/03/23 01:45 PM

When you can't find a torque specification for a bolt in the FSM I usually resort to a reference guide.

Such as

https://www.portlandbolt.com/technical/bolt-torque-chart/
Posted By: moparx

Re: Pinion Snubber Install Torque Spec - 03/03/23 05:25 PM

i used that calculator to determine the torque of a plain, [unplated, non lubed] 3/8-16 grade 5 bolt.
it came in as 31ftlb. i had suggested 25-30ftlb.
if i were to be installing the snubber plate, i wouldn't worry too much about what torque value the FSM states. i would just tighten it good with a medium length 3/8 drive ratchet and call it good. having installed [quite] a few of these over a 50+ year span as i have described, none have ever come loose, or have had any bolts broken or stripped threads in the housing.
however, one could always revert to the tried and true method of part installation that has worked forever. "tighten it up until it strips or breaks, then back it off 1/2 a turn."..........[i couldn't resist. biggrin]
beer
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