Rear diff fluid leak?
#21
#22
#23
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Burt Gummer (07-24-2017)
#24
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When I took auto mechanics in high school a couple hundred years ago, our teacher made us taste every one of the fluids in a car. After that, I can tell by taste what it is and if it's still good. Try it for your leak. I likely won't kill you. Oil tastes very different than water.
lol
#25
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When I took auto mechanics in high school a couple hundred years ago, our teacher made us taste every one of the fluids in a car. After that, I can tell by taste what it is and if it's still good. Try it for your leak. I likely won't kill you. Oil tastes very different than water.
See what color it is, touch it and rub it between your fingertips, and try to rinse it away with water.
Water is, or course, water soluble.
Brake fluid is water soluble, and feels slippery.
Coolant is water soluble, and probably the same color as the coolant still in the system
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
Oil is not water soluble.
Of the oils, note where the leak is. There is engine, transmission, and differential oil. The location of the leak is usually instructive, although it may be from somewhere above or forward of where it drops to the ground.
Water leaking from an exhaust system will typically either be blackish (soot) or reddish (rust). Stainless exhaust systems won't show the rust. The sooty water is from startup. Once the pipes are hot that will stop.
#27
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Update...
Parts came, service completed. Dealer found that pinion seal was leaking. Replaced defective pinion seal and refilled with fresh gear oil.
QTY FP-NUMBER DESCRIPTION
1 C2C41650 SEAL-OIL PINION
2 C2D3650 OIL-FINAL DRIVE
Will need some time to see if it is fixed.
Parts came, service completed. Dealer found that pinion seal was leaking. Replaced defective pinion seal and refilled with fresh gear oil.
QTY FP-NUMBER DESCRIPTION
1 C2C41650 SEAL-OIL PINION
2 C2D3650 OIL-FINAL DRIVE
Will need some time to see if it is fixed.
Last edited by nonsns3; 10-04-2016 at 11:17 PM.
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Unhingd (10-05-2016)
#28
#29
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I just pulled her out of the garage for a clean up and noticed an oil spot. Yes its oil, I smelled it and rubbed it between my fingers. Definitely the stink of differential oil, I also crawled under her and found the leak. Its differential fluid leaking around what looks to be around the pumpkin. 5k miles, and it was just in for service...not that I am suspicious but...
#30
#31
#32
Join Date: Oct 2016
Location: Charlotte, North Carolina
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It sounds like about 50% of these are exhaust soot and condensation and 50% appear to have been the more serious leaking differential. I noticed a similar spot under the rear of my car with less than 1,100 miles on it. I also just happened to have needed to have taken it in for that issue. Did so and the SA confirmed that the rear differential on mine showed no signs of any leaks so he stated that mine are due to exhaust condensation. He stated that this is likely due to "short trips" where the exhaust doesn't have time to fully heat up and evaporate.
#33
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It sounds like about 50% of these are exhaust soot and condensation and 50% appear to have been the more serious leaking differential. I noticed a similar spot under the rear of my car with less than 1,100 miles on it. I also just happened to have needed to have taken it in for that issue. Did so and the SA confirmed that the rear differential on mine showed no signs of any leaks so he stated that mine are due to exhaust condensation. He stated that this is likely due to "short trips" where the exhaust doesn't have time to fully heat up and evaporate.
#34
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#35
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I also would have expected that a 5 minute "grocery run" would have heated the catalytic converter as well as the balance of the exhaust to the point where no water vapor could have been retained to "drain" through such a hole. I guess I am still learning what is what on this one ![Icon Munching](https://www.jaguarforums.com/forum/images/smilies/icon_munching.gif)
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No 5 minutes is not enough, worse its adding to the problem, thus compounding.
Jaguar's research must have shown that most of us drive like grandma.
#36
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I would have thought that an exhaust system would have gotten so hot that drainage of "water" would not be an issue. The car is parked 100% of the time within a climate-controlled garage so it's not like there is a ton of moisture from the outside seeping into the exhaust system. I also would have expected that a 5 minute "grocery run" would have heated the catalytic converter as well as the balance of the exhaust to the point where no water vapor could have been retained to "drain" through such a hole. I guess I am still learning what is what on this one ![Icon Munching](https://www.jaguarforums.com/forum/images/smilies/icon_munching.gif)
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ndabunka (12-21-2017)
#38
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Mine is in the workshop now with the Seal gone between the prop shaft and the diff,, only done 17k miles,, bit of a worry as may have been leaking a month or two.
Anyone know if there is a low level sensor for the Diff oil,,, any one else suffering with warranty work like this ?
Anyone know if there is a low level sensor for the Diff oil,,, any one else suffering with warranty work like this ?
#39
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There is no sensor for diff fluid, at least none that I am aware of. I do know when my was replaced, I was concerned as well about the lack of fluid in the diff. If yours is anything like mine, it leaked and then it seemed to stop. Which indicated to me it was low, but not empty.
I would assume if there was a failure in the future, we could refer to this event and have JLR pay for any damages.
I would assume if there was a failure in the future, we could refer to this event and have JLR pay for any damages.
#40
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I just pulled her out of the garage for a clean up and noticed an oil spot. Yes its oil, I smelled it and rubbed it between my fingers. Definitely the stink of differential oil, I also crawled under her and found the leak. Its differential fluid leaking around what looks to be around the pumpkin. 5k miles, and it was just in for service...not that I am suspicious but...