pinion play

Reply Subscribe

Thread Tools

Search this Thread

Aug 20, 2007 | 02:55 PM

tastyklair

Thread Starter

Elder User

Joined: Jan 2004

Posts: 867

Likes: 0

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".

Aug 20, 2007 | 05:25 PM

rclarke

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.

Aug 20, 2007 | 06:40 PM

tastyklair

Thread Starter

Elder User

Joined: Jan 2004

Posts: 867

Likes: 0

From: Eastern Pa

It's the up and down side to side I'm concerned with.

Aug 20, 2007 | 09:31 PM

fasthauler

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.

Aug 21, 2007 | 01:47 PM

rclarke

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.

Aug 22, 2007 | 06:18 PM

tastyklair

Thread Starter

Elder User

Joined: Jan 2004

Posts: 867

Likes: 0

From: Eastern Pa

To be clear the play is in moving the yoke up and down, sideways, etc. What is a good publication to use for overhaul of the rear?

Aug 22, 2007 | 10:10 PM

fasthauler

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.

Trending Topics

Another Crank no start -- sorry

23

384
Odd knock/rattle at idle only after fully warmed up

27

424
My 1976 F-250

3.9k

263.3k
This is prolly a 1 page thread at most

110.3k

6M
Automatic and Manaul TPS the Same?

20

314

Aug 23, 2007 | 11:12 PM

Mr. M

Elder User

Joined: Oct 2006

Posts: 843

Likes: 1

From: Redmond, WA

Quote:

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.

I used a similar manual to rebuild my finicky 8.8" with no problems. I doubt you will have any issues setting up your 9" to spec with the same manuals.

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!