Pinion set up help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ratfreak8871 · 03-08-2017, 11:30 PM

Overtightened my pinion nut to 35in./lbs. Should I run it, replace it, or back it off to 25in./lbs, and run it???

Dc42d76 · 03-09-2017, 12:53 AM

Pinion nut does not tighten to 24 inch lbs . 24-32 inch lbs is the force needed to turn the pinion after it is tightened. New crush sleeve ? Old crush sleeve ?

ratfreak8871 · 03-09-2017, 01:09 AM

New sleeve bearings everything. Found spec on this all over the place anywhere from 12 - 29 in. Should I take it back to 35?

ratfreak8871 · 03-09-2017, 02:09 AM

Yes that's what I'm getting at,

homemade87 · 03-09-2017, 08:23 AM

Its not preferable to back off the pinion nut once you have gone to far . 35in lbs may be ok on a new bearing . If it is an old bearing I would start over for sure . But if new bearing I would back it off to 30in lbs and you should be fine . If you back it off to much the bearing will become loose and not have the proper pressure to keep it seated . If too much it will damage the bearing .

**MikeB** · 03-09-2017, 12:37 PM

New crush sleeves are cheap. You can also get a set of shims instead, which is what I plan to use next time. More user friendly and not affected by pinion nut torque. These are for 8.5" 10-bolt.

https://www.ringpinion.com/b2c/Produ...px?ProdID=8280

Port&PolishMan · 05-15-2017, 07:19 PM

Quote:

Originally Posted by homemade87

Its not preferable to back off the pinion nut once you have gone to far . 35in lbs may be ok on a new bearing . If it is an old bearing I would start over for sure . But if new bearing I would back it off to 30in lbs and you should be fine . If you back it off to much the bearing will become loose and not have the proper pressure to keep it seated . If too much it will damage the bearing .

Dam'd If Ya _Do and Dam'd If ya Don't ? __ _ WTH

OK - Next Up - what the H are these Guys doing - First Video . .

https://youtu.be/OwrH2kBoyhw

Second Video - I able to Actually Follow what this Guy is Doing . .

https://youtu.be/OwrH2kBoyhw

Learn How to &^&%$&$ Communicate . .

homemade87 · 05-16-2017, 07:15 AM

Quote:

Originally Posted by Port&PolishMan

Dam'd If Ya _Do and Dam'd If ya Don't ? __ _ WTH

OK - Next Up - what the H are these Guys doing - First Video . .

https://youtu.be/OwrH2kBoyhw

Second Video - I able to Actually Follow what this Guy is Doing . .

https://youtu.be/OwrH2kBoyhw

Learn How to &^&%$&$ Communicate . .

Both the links to the videos are of the same video . But what he is doing is torquing the nut to crush the sleeve . Video is not complete info at all . Once the slack is out and the bearings start to seat is when you get preload . At this point you measure for drag and sneak up on it . Video stops short of this .

03-08-2017, 11:30 PM	#1
ratfreak8871 Registered User Join Date: May 2007 Location: ALTON, IL. Posts: 98	Pinion set up help Overtightened my pinion nut to 35in./lbs. Should I run it, replace it, or back it off to 25in./lbs, and run it???

03-09-2017, 12:53 AM	#2
Dc42d76 Registered User Join Date: Nov 2013 Location: Gallup, New Mexico Posts: 188	Re: Pinion set up help Pinion nut does not tighten to 24 inch lbs . 24-32 inch lbs is the force needed to turn the pinion after it is tightened. New crush sleeve ? Old crush sleeve ?

03-09-2017, 01:09 AM	#3
ratfreak8871 Registered User Join Date: May 2007 Location: ALTON, IL. Posts: 98	Re: Pinion set up help New sleeve bearings everything. Found spec on this all over the place anywhere from 12 - 29 in. Should I take it back to 35? Last edited by ratfreak8871; 03-09-2017 at 01:18 AM.

03-09-2017, 02:09 AM	#4
ratfreak8871 Registered User Join Date: May 2007 Location: ALTON, IL. Posts: 98	Re: Pinion set up help Yes that's what I'm getting at,

03-09-2017, 08:23 AM	#5
homemade87 Registered User Join Date: Apr 2010 Location: Guntersville Alabama Posts: 1,073	Re: Pinion set up help Its not preferable to back off the pinion nut once you have gone to far . 35in lbs may be ok on a new bearing . If it is an old bearing I would start over for sure . But if new bearing I would back it off to 30in lbs and you should be fine . If you back it off to much the bearing will become loose and not have the proper pressure to keep it seated . If too much it will damage the bearing .

03-09-2017, 12:37 PM	#6
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,423	Re: Pinion set up help New crush sleeves are cheap. You can also get a set of shims instead, which is what I plan to use next time. More user friendly and not affected by pinion nut torque. These are for 8.5" 10-bolt. https://www.ringpinion.com/b2c/Produ...px?ProdID=8280 __________________ Mike 1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!



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