Hi,
My BW diff under the LX is leaking oil slowly, the car has been on car ramps for 3 weeks now and the puddle of oil is about half the size of an A4 sheet of paper.
Is there a seal or something at the tailshaft end of the diff?
Any other ideas?
Also what oil/fluid should I be puttting in it to top it up for the time being?
Thanks Youngy
R31 BW diff leaking oil
Started by
_youngy_11_
, Dec 16 2009 09:23 AM
6 replies to this topic
#2
Struggler
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Posted 16 December 2009 - 09:38 AM
There is a pinion seal at the front of the diff housing where the pinion flange comes out.
BW diffs have a bad habit of leaking oil past the splines of the pinion gear (where the yoke slides on) this will cause oil to leak out near the nut under the tailshaft flange.
Give it a quick degrease and check where the actual leak is and let us know.
BW diffs have a bad habit of leaking oil past the splines of the pinion gear (where the yoke slides on) this will cause oil to leak out near the nut under the tailshaft flange.
Give it a quick degrease and check where the actual leak is and let us know.
#3
_youngy_11_
_youngy_11_
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Posted 16 December 2009 - 10:54 AM
From memory when I looked at it closely previously I think it is leaking from where the pinion flange comes out.
See the image,
Am I right?
Which oil?
Thanks
See the image,
Am I right?
Which oil?
Thanks
#4
View GaragePosted 16 December 2009 - 12:22 PM
In that case it would be the pinion seal which unfortunately means removing the flange/yoke - mark it carefully and count the number of turns so you can put it back exactly and do not overtighten it (this sets pinion bearing preload).
A normal 80W90 gear oil should be fine, use a limited slip oil or an additive if its LSD.
A normal 80W90 gear oil should be fine, use a limited slip oil or an additive if its LSD.
#5
_youngy_11_
_youngy_11_
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Posted 16 December 2009 - 02:30 PM
I have been quoted $125 but I should be able to do it myself.
So your talking about the number of turns on the nut behind the flange?
Bloody teething problems, just got it back on the road after front end issues!
Cheers
So your talking about the number of turns on the nut behind the flange?
Bloody teething problems, just got it back on the road after front end issues!
Cheers
#6
Posted 16 December 2009 - 03:06 PM
Yes, if you don't put it back in exactly the same spot without any overtightening then you change the bearing preload. You'll probably need a puller of some sort to get the flange off the pinion spline, pretty straight forward though.So your talking about the number of turns on the nut behind the flange?
#7
_youngy_11_
_youngy_11_
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Posted 16 December 2009 - 04:57 PM
Yeah no worries, I do have a puller that should be able to do that.
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