Do you guys have a second or two ?

Rizzo03

Rizzo03

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Joined
Apr 8, 2013
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104
Location
Romulus, MI, USA
Ok dig, I'm back again for some truthyness :D


I have a hum in the rear of my Baja and it does not change if I turn or change lanes, But damned if it isn't a bearing noise.

Having done the rear brakes I checked the outer actual wheel bearings and they're both fine.

Today I checked the inner bearing at the rear differential. I can move the half shaft up and down, Shouldn't it not do that?

Does this mean that, That bearing is toast ?

If that's so then how come I can't find one anywhere ?


Thanks guys.

If it would help I can shoot a video of the movement.

(The Baja is based of the 00-04 Legacy and Outback if that helps.)
 
Oh, and my rear differential was hotter to the touch that anything else back there, Except for the exhaust pipe.
 
Hate to say it Rizzo, but I agree with Taza.

Your diff shouldn't be that sort of hot, and you shouldn't be able to move the drive shaft at all ...

Sounds as if you have a well and truly rooted diff bearing, and if that's the case, chances are that the entire rest of the diff has been running seriously loose and seriously out of alignment ... doesn't bode well :( :( :censored: :puke:
 
Ratbag said:
Your diff shouldn't be that sort of hot, and you shouldn't be able to move the drive shaft at all ...

Sounds as if you have a well and truly rooted diff bearing, and if that's the case, chances are that the entire rest of the diff has been running seriously loose and seriously out of alignment ...
Click to expand...

Yep, agree it's new diff time - or get it stripped down and reconditioned, but I reckon you'd be better to get one that's in good condition and have it checked over instead.

I'd imagine that would've leaked a lot of oil too - how did this pass a roadworthy/rego check/what ever it is you have over there?

My other question is what did they do to the drive train in this vehicle - I read your intro but didn't reply (work :/), first the gearbox and now the rear diff? Strange. Pinch the one out of your wife's foz :poke:

Cheers

Bennie
 
I have heard that it's common for the rear diff (4.11) in the SG Foresters to get a whine. Mine which is from a SG with about 170k km has a whine similar to your description and clunks like a clicking CV when I reverse. ...
 
There's a difference between a whine and actually being able to move the output shaft/CV cup. Unless Rizzo is moving the CV cup and not the diff centre/output shaft, that's one pretty shagged out diff!

The only reason my rear diffs whine is they get water in them and I fail to swap the oil. Diff breather will be installed on this one before it sees any water action.

Cheers

Bennie
 
CV shaft that actually turns the passenger side wheel.

The hum has been consistent since I got the car around 5,500 miles ago.

I have no clunks,clicks or anything else except what I believe is a warped rotor. I have a scrape sound that I can , with my hand reproduce on the passenger side with wheels up and turning that wheel myself.

The Rotor has one spot that catches the dust shield and I see a clean spot just above the "drum" section for the parking brake. Ring ground into the rotor and one shiny spot on the dust cover/spindle plate.

I make no noises turning.

I'm new to the whole CV driven drivetrain so maybe I'm not the best at explaining this.

rear-differential-protect-subaru.jpg



Stolen pic... See where the CV shaft has a green portion, then it has a gold section, I can move that up and down slightly.
 
I appreciate everyone's responses.

I made need to go back a few steps here. FWD/AWD is a new set of drivetrain items to me.

I can bang out some RWD in second flat.


How should I check the CV shafts for play? If my Baja in on all 4 wheels on the ground and I just crawl under and start to wiggle,push and pull them, Is that the right way ?


The brake link above is slightly different from mine and I hear it all the time and my wear spot is at 5 O'clock, AND there's no way I'm grinding anything off to the extent that guy did.
 
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