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Username Post: Pinion Nut        (Topic#368546)
Pastor J 
Newbie
Posts: 9

Age: 57
Loc: Varnville SC
Reg: 03-06-18
05-29-22 06:54 PM - Post#2842007    

I just put the third member (pumpkin) in. But the pinion nut had already been taken off so i have no idea how many turns and no markings to go on. Does anyone know how tight i should tighten the nut?

Pastor James
80 Triumph Spitfire almost finish
1955 Chevy 4d 235, PG middle of frame off
1955 Ford Custom Line waiting
1957 Nash Ambassador waiting
1967 Chevy Van waiting


 


bobb 
Super Senior Member
Posts: 6047

Loc: paradise
Reg: 09-05-03
05-30-22 11:46 AM - Post#2842041    
    In response to Pastor J

you should have put the nut on first. with the axles out you need an inch pound torque wrench. bearing preload turning the nut should be around 5-8 inch pounds i believe, but dont quote me on that. tighten the nut till you get the desired preload. you should also have a new crush sleeve in there. i have done it with red loctite and an old crush sleeve but i dont recommend doing it that way. i also like to use silicone on the splines of the yoke to prevent seep through leaks.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


Edited by bobb on 05-30-22 11:50 AM. Reason for edit: No reason given.

 
YOUNG57 
Frequent Contributor
Posts: 1340

Loc: Tennessee
Reg: 12-06-10
06-02-22 07:37 AM - Post#2842199    
    In response to Pastor J

The pinon nut is NOT how many turns or even how much torque. It crushes a steel sleeve between the two tapered roller bearings to set their preload.

If you had the nut off because you replaced the seal or something, you should put Permatex gasket sealer on the yoke splines to stop oil leaks and blue Loctite on the threads to stop the nut from backing off.

You’ll need to hold the flange (big pipe wrench) to stop it from turning while you tighten the nut with a 12” breaker bar until you can’t get any more. The bearing preload was already set when to crush sleeve was first crushed. All you need to do is get the nut as tight as you can without crushing the sleeve further which requires a lot more than a 12” breaker bar




 
fuzz1957 
Contributor
Posts: 595

Loc: NE IA
Reg: 02-18-08
06-02-22 05:54 PM - Post#2842227    
    In response to YOUNG57

Read this:

http://chevy.oldcarmanualproject.com/shop/1955/55c...

Fuzz







 


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