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Old August 28th, 2011, 07:31   #1
hgsmith
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Default leaking final drive oil

I have a 2003 auto with 285000 miles. I have noticed a light oil on the dogbone when I change the oil. I assume this is coming from the final drive. Not a lot but just wondering why it would be leaking. The Bentley says to check level with the drive gear after removing the speedometer. I am not sure where all of this is located. Does any one have pictures. I searched and found someone with the same problem but no final solution. Please inform me if you know of this problem. Thanks
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Old August 28th, 2011, 09:01   #2
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the speedo drive gear is the "dipstick" on the 01M final drive ....it's located above the drive flanges on top of the differential area passenger side....it has a 3 wire harness connector.... pull the connector, unscrew the speed sensor, unscrew the drive gear from the trans ....wipe it off reinstall (screw it in) remove....oil level should be to the bottom of the drive gear....it takes synthetic gear oil
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Old August 28th, 2011, 09:20   #3
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Thanks jimbote, will check it out. Why would it leak out ?
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Old August 28th, 2011, 09:25   #4
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Quote:
Originally Posted by hgsmith View Post
Thanks jimbote, will check it out. Why would it leak out ?

There is a paper type seal there that over time tends to seep. Mine did that too. I tried to tighten the bolts a bit and it didn't help. I ended up draining the oil, removing the cover, and making my own seal from some Buna N tubber I had around. Permatex UltraGrey would probably be suitable also as long as the old gasket is thouroughly scraped off, and everything is pristinely clean at the sealing surfaces.




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Old August 28th, 2011, 10:26   #5
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could be the rubber circlip plug behind the axle flange, the flange seal itself or as josh stated the paper gasket for the diff housing cover....
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Old August 29th, 2011, 11:57   #6
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Wow, 285K miles on an auto. Keep up the good driving.
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Old July 9th, 2012, 17:21   #7
rensho
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You ever figure out what caused the leak?

I'm on a 01P eurovan tranny, and the yellow fluid is leaking out the breather. 190kmi, tranny rebuilt 3yrs ago, ~15kmi.
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