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Old 10-15-2007, 04:37 PM   #1
fastenova
Scooby Specialist
 
Member#: 38829
Join Date: Jun 2003
Chapter/Region: NWIC
Location: Tigard, OR
Vehicle:
Not your usual 1997
Legacy GT

Default Differential/stub axle bearings

So I've been trying for the past couple of weeks to figure out how come I had a noise coming from my right front wheel well. It sounded like the tire was rubbing, and only made noise when I was turning left.

I finally figured out that the tire was NOT rubbing and instead I have a very large amount of play at the front stub axles where the CV axle attaches.

I would like to think it's just the bearings that the stub axles go through. Any thoughts? I called the dealer and they want $70 apiece for the bearings, which I don't really want to pay, so I'm going to try to find them at McMaster-Carr or McGuire Bearing once I pull them out.

Anything else I should look at? Is this replacement possible with the tranny in the car? What is the best way to apply the correct amount of torque to the keyed 'differential side retainer'? I was just going to buy a large socket, and cut notches in it...?

My plan is to just pop off the retainers, remove the seals, pull the bearings out and put new ones in, use new seals (I just put new o-rings in not too long ago) then lightly screw the retainer on and then use a torque wrench with my home made tool to snug them up to spec, as this should set the preload on the bearings (They are tapered roller bearings).

Also, anyone know how much play there should be when it's all put back together? Any? Should the stub axles be very tight in there?

Thanks!
Aaron
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Old 10-22-2007, 02:07 PM   #2
fastenova
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Member#: 38829
Join Date: Jun 2003
Chapter/Region: NWIC
Location: Tigard, OR
Vehicle:
Not your usual 1997
Legacy GT

Default

I replaced these bearings, which tightened up the axle play a bit, but I'm still having the noise. I'm wondering if it's from worn teeth on the front differential... I may end up taking it to a transmission shop for a ride along and diagnosis, as I'm not sure what is making the noise now.

As far as the side bearing replacement goes, I got new bearings from McGuire bearing. They were $20/side. I made a home-made puller out of a pair of snap ring pliers because a regular 2-jaw puller wouldn't fit inside the hole. The outer races just slid right off, the inner assemblies took a little bit of work, but they weren't too tight.

I set the backlash and preload on the bearings based on instructions given to me by a friend who works at a transmission shop. I am planning on getting the proper tools to measure backlash (dial indicator) to make sure it's set up right, as I'm not too confident in my setting it up 'by feel' as my friend suggested. I'll post again once I take some measurements and describe the method in more detail if I know if worked

Aaron
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Old 11-09-2007, 10:59 AM   #3
fastenova
Scooby Specialist
 
Member#: 38829
Join Date: Jun 2003
Chapter/Region: NWIC
Location: Tigard, OR
Vehicle:
Not your usual 1997
Legacy GT

Default

You won't believe this. The shop that did my wheel bearings *forgot* to reinstall the snap ring on the inner side of the knuckle. So, the entire bearing assembly was shifting back and forth in the knuckle. It ruined the inner seal, and since the axle/hub/rotor/wheel are all attached to the bearing assembly, I have some nice grooves in my newer rotor and caliper bracket on one side

I was pretty pissed off. But, I figured out what the problem was, so I guess I can't be too upset. I still spent less than if I had somebody else do my wheel bearings

Moral of the story: when you pay a 'professional' to do work on your car, always tear it back apart and inspect!!!
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Old 11-10-2007, 10:04 AM   #4
birukun
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Member#: 52801
Join Date: Jan 2004
Chapter/Region: SCIC
Location: San Diego, CA.
Vehicle:
1999 Legacy Wagon L
Green 30th Anniv.

Default

Which car was this for?

Thanks-

Bill in SD
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Old 11-10-2007, 01:09 PM   #5
fastenova
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Member#: 38829
Join Date: Jun 2003
Chapter/Region: NWIC
Location: Tigard, OR
Vehicle:
Not your usual 1997
Legacy GT

Default

The '97 Leg GT.
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Old 11-12-2007, 10:20 AM   #6
birukun
Scooby Newbie
 
Member#: 52801
Join Date: Jan 2004
Chapter/Region: SCIC
Location: San Diego, CA.
Vehicle:
1999 Legacy Wagon L
Green 30th Anniv.

Default

Thanks.

I was just curious, since I have a 99 and want to be sure that I don't make the same mistake.

Cheers-
Bill in SD
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