Pinion Nut + preload?
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Senior User
Joined: Dec 2004
Posts: 243
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From: Bremerton, WA (Seattle)
Pinion Nut + preload?
It has been suggested in a previous post that I check to see if my pinion nut is loosy-goosy and to tighten it to spec with locktite. Well I was looking around and I found what looks like it says 220Lbs. But in another area when it says to replace the pinion seal you have to go though this procedure of checking how much poundage on a torque wrench it take to spin the differential with no wheels or drums on. Then remove the pinion nut and seal, replace the seal, and put the nut on to 160 Lbs. and check the spinning poundage and adjust the nut accordingly.
Well I assume that the nut would need to be on at a specific poundage per my axle. So how would I figure this if the nut has come loose?
Thanks guys!!!
Well I assume that the nut would need to be on at a specific poundage per my axle. So how would I figure this if the nut has come loose?
Thanks guys!!!
Cargo Master
Joined: Dec 2003
Posts: 2,735
Likes: 38
From: Sunny Florida
If the nut is loose you will be able to move the pinion up and down by grabbing the yoke and pushing/pulling on it. 9 times out of 10 you will more than likely have a bad pinion bearing if it has been driven for to long. You can still tighten it down and it will last just not as long as a new or overhauled unit would.
The pinion nut can not be set by the 200ft/lb number. You have to check for the drag on the bearings. Used bearings should be lighter than new bearings. You can get two different out comes with two different crush sleeves if you just torqued them down to 200ft/lbs. Once you take a crush sleev to far by over torqueing it you have to replace the crush sleeve and start over, or you should. You can feel the drag just like when one is adjusting a rear brake drum.
The pinion nut can not be set by the 200ft/lb number. You have to check for the drag on the bearings. Used bearings should be lighter than new bearings. You can get two different out comes with two different crush sleeves if you just torqued them down to 200ft/lbs. Once you take a crush sleev to far by over torqueing it you have to replace the crush sleeve and start over, or you should. You can feel the drag just like when one is adjusting a rear brake drum.
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