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Leaking Swing Axle Gearbox?

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Lateral Wolfsburg Wizard

480 posts · joined Sep 2011 ·

#988105
Hi Guys

I'm trying to track down the source of oil in the gearbox bell housing.

It doesn't smell like gearbox oil and the main seal looks ok.

I have posted a few shots of the oil and of what looks like a "line" from either the casting of the gearbox housing or is some sort of crack.

Your comments are appreciated.

Regards
Greg

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farkengruven Seriously Crusin Dubber

167 posts · joined Jan 2006 ·

#988109
Admitedly, it looks like a crack, however, you said it was not gearbox oil. Therefore, it can only come from the engine. Rear main seal.
2007 T5 TDI Crewvan
2003 Passat
NSU Ro80
1975 Passat TS
1973 L bug

Lateral Wolfsburg Wizard

480 posts · joined Sep 2011 ·

#988113
I've had a look at a few other photos of other swing axles via Google and they all seem to have this type of "blemish"....

grumble Son of Jim - Creator of Good

2,672 posts · joined Jun 2008 ·

#988126
I think you will find that this is a casting mark,as the oil is black it has to be engine oil also there is no signs of it running down the transmission case. Even though the seal may look good it may be the main bearing moving in the case and the oil leaks past .

Lateral Wolfsburg Wizard

480 posts · joined Sep 2011 ·

#988128
Thanks Grumble,

I'll check the main seal.

Regards
Greg

grumble Son of Jim - Creator of Good

2,672 posts · joined Jun 2008 ·

#988132
When the seal is out check the rear main bearing for play in the case and also replace the o ring inside the flywheel.

Lateral Wolfsburg Wizard

480 posts · joined Sep 2011 ·

#988133
Will do.