pinion play
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Elder User
Joined: Jan 2004
Posts: 867
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From: Eastern Pa
pinion play
In my 79 4x4 there is some play at the pinion bearing going into the housing. What is the allowable tolerance. All I have is a Haynes manual and it doesn't say. It's a Ford 9".
Posting Guru
Joined: May 2003
Posts: 1,525
Likes: 3
Slight gear clearance is ok, bur if you are talking about bearing looseness that is bad. The bearings should have slight preload. Gear clearance is rotating movement. Bearing looseness is up and down movement.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,398
Likes: 17
From: Hesperia, CA
Doesn't sound good. No apparent bearing preload. You are close to having a major problem. I am not familiar enough with that unit to give you any help. You need to check and see if that unit uses a crush sleeve. Maybe it wasn't crushed. Maybe the pinion yoke is loose. You need to get a manual and check it out before driving it much longer.
Posting Guru
Joined: May 2003
Posts: 1,525
Likes: 3
A 9" does use a crush sleeve. If it is loose don't just tighten it up. You most likely will destroy the pinion bearings and possibly damage the gears. I would remove the pumpkin and replace the bearings with a new crush sleeve. I would also replace the carrier bearings. The 9" is one of the easiest rearends to setup. Just don't replace the pinion shim and the pinion depth probably will stay ok.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,398
Likes: 17
From: Hesperia, CA
You can get the CD on you vehicle from one of this sites sponsors. You can also go to http://www.yukongear.com/ and download a free manual that shows how to crush the sleeve.
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Elder User
Joined: Oct 2006
Posts: 843
Likes: 1
From: Redmond, WA
Originally Posted by wb6vvv
You can get the CD on you vehicle from one of this sites sponsors. You can also go to http://www.yukongear.com/ and download a free manual that shows how to crush the sleeve.
This was also my first rear end rebuild, gear, and LS swap. I had it checked at Randy's ring and pinion 5,000 miles later with no issues. If I can do it with my nominal mechanic skills and cheap tools... so can you!
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