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Old 05-24-2012, 03:32 PM   #1
oaklandish_WRX
Scooby Specialist
 
Member#: 267339
Join Date: Dec 2010
Chapter/Region: BAIC
Location: the 5 n dime, NORCAL
Vehicle:
2002 0[[XXXXoXXXX]]0
MBP

Default Rear Diff breather replace - easy or hard?

Done my homework and nothing definitive, so asking the crowd:

In an '02 WRX rear diff, how easy is it to inspect/remove/replace the diff breather on top of the case?

I suspect mine is clogged and its the cause of my slow leak out the pinion seal. Or the damn seal is shot - but let's try the cheap stuff first.

I am not afraid to drop the diff a few inches with all else connected, but don't have the tools space or time to pull the axles, DS and do a true diff removal. I've seen the writeup for the diff bushing replacements and could do both at the same time, I think.

I have the FSM but it only deals with diffs that are removed - think it said to hammer it in. Doubt I would have the space to swing a hammer under the diff carrier.

thanks!!
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Old 05-24-2012, 04:34 PM   #2
NitroTrike
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Member#: 62408
Join Date: May 2004
Chapter/Region: South East
Location: GWR, Florida
Vehicle:
2002 wrx w/ STi guts
174k miles on Mobil 1

Default

Pinion seals leak because they are... pinion seals.

I doubt the breather is clogged unless you've been driving up to the doors in mud.

You can pop off the top cap on the breather and run a piece of wire etc down it if it bothers you that much. Getting the whole assemble out without breaking the tabs off will require the diff cover to be removed.
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Old 05-24-2012, 05:34 PM   #3
oaklandish_WRX
Scooby Specialist
 
Member#: 267339
Join Date: Dec 2010
Chapter/Region: BAIC
Location: the 5 n dime, NORCAL
Vehicle:
2002 0[[XXXXoXXXX]]0
MBP

Default

^^

I was assuming it was clogging due to it, in all likelihood, running the factory fill in the diff for >91k miles and clogging from the inside out, so to speak.

Plus, being a former florida car it could have been subjected to deep water. Given the amount of hidden rust I've found....uggh.

I'll start saving my pennies. thanks for the response.
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