Pinion torque
Thread Starter
Racer
Joined: Mar 2011
Posts: 359
Likes: 13
From: Elma NY
Pinion torque
I replaced the pinion seal on my 69 and am having a problem finding the torque specs for the pinion nut. I went on U tube and most people counted the turns as they took off the nut (of which I didn't do) so I need a little help.
Thanks
Thanks
Le Mans Master
Joined: Jun 2006
Posts: 6,400
Likes: 1,226
From: Tampa Florida
I used a witness mark when I did mine.
Gary's thread might help you since he mentioned using a witness mark along with checking the torque.
https://www.corvetteforum.com/forums...-pictures.html
Gary's thread might help you since he mentioned using a witness mark along with checking the torque.
https://www.corvetteforum.com/forums...-pictures.html
Tech Contributor
Joined: Aug 1999
Posts: 15,175
Likes: 3,986
From: Connecticut, USA
There is no torque rating for the pinion yoke nut unless you have installed a solid sleeve in place of the original crush sleeve. The sleeve is crushed until the correct rotational drag is reached on the bearing preload. 15-20 in/lb with new or 5-7 with used bearings.
If you didn't mark it then you need to carefully bring the yoke in until it hits the bearing, then enough to get to the 5-7 in/lb on the used bearings. Now with that said I know plenty of old timers would just bring it in until it was snug and leave it. Too tight and the bearings will bind and wear, too loose allows play in the pinion and under launch will move back and crash into the posi case.
If you didn't mark it then you need to carefully bring the yoke in until it hits the bearing, then enough to get to the 5-7 in/lb on the used bearings. Now with that said I know plenty of old timers would just bring it in until it was snug and leave it. Too tight and the bearings will bind and wear, too loose allows play in the pinion and under launch will move back and crash into the posi case.
Racer
Joined: Sep 2016
Posts: 307
Likes: 66
From: Louisville, KY
Is there a standard pinion nut TQ spec when using a solid sleeve? Or is it determined by the solid sleeve manufacturer?
There is no torque rating for the pinion yoke nut unless you have installed a solid sleeve in place of the original crush sleeve. The sleeve is crushed until the correct rotational drag is reached on the bearing preload. 15-20 in/lb with new or 5-7 with used bearings.
If you didn't mark it then you need to carefully bring the yoke in until it hits the bearing, then enough to get to the 5-7 in/lb on the used bearings. Now with that said I know plenty of old timers would just bring it in until it was snug and leave it. Too tight and the bearings will bind and wear, too loose allows play in the pinion and under launch will move back and crash into the posi case.
If you didn't mark it then you need to carefully bring the yoke in until it hits the bearing, then enough to get to the 5-7 in/lb on the used bearings. Now with that said I know plenty of old timers would just bring it in until it was snug and leave it. Too tight and the bearings will bind and wear, too loose allows play in the pinion and under launch will move back and crash into the posi case.
