May 21, 2022, 03:10:28 AM
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Author Topic:  RDU puking oil again  (Read 1530 times)

Offline Mksmark

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RDU puking oil again
« on: December 20, 2021, 05:22:12 PM »
About 6 months ago i had the same problem and removed the pan and cleaned everything up and refilled with new fluid. Its not over filled. So now it pushing fluid out from the top again and I have no idea why? Any thoughts out there? Car has 110k and is a 2012 MKS

Offline Mksmark

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Re: RDU puking oil again
« Reply #1 on: January 11, 2022, 04:09:14 PM »
It still is coming out top and leaking on the garage floor at night. The car is driven by my wife and never raced, Yes we are old and it never sees long trips and we just drive it around town at low speeds. I have talked to some repair shops and they are talking about replacing the entire RUD or rear diff. It make no noise and has no other issues. The car runs perfect. I have been repairing my own cars for about 45 years and have never ran into a problem like this?

Offline Macgyver

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Re: RDU puking oil again
« Reply #2 on: January 12, 2022, 10:17:10 AM »
It still is coming out top and leaking on the garage floor at night. The car is driven by my wife and never raced, Yes we are old and it never sees long trips and we just drive it around town at low speeds. I have talked to some repair shops and they are talking about replacing the entire RUD or rear diff. It make no noise and has no other issues. The car runs perfect. I have been repairing my own cars for about 45 years and have never ran into a problem like this?


When you say leaking or pushing out the top. How much ? I know it shouldnt be doing it at all.

Offline SHOdded

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Re: RDU puking oil again
« Reply #3 on: January 13, 2022, 05:43:27 AM »
how much fluid are you adding, and what fluid exactly are you using in the RDU?
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If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline TopherSho

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Re: RDU puking oil again
« Reply #4 on: January 13, 2022, 09:54:14 AM »
Just out of curiosity .. is it cloudy? (contaminated?) 
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Offline Mksmark

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Re: RDU puking oil again
« Reply #5 on: January 21, 2022, 02:01:04 PM »
It still is coming out top and leaking on the garage floor at night. The car is driven by my wife and never raced, Yes we are old and it never sees long trips and we just drive it around town at low speeds. I have talked to some repair shops and they are talking about replacing the entire RUD or rear diff. It make no noise and has no other issues. The car runs perfect. I have been repairing my own cars for about 45 years and have never ran into a problem like this?


When you say leaking or pushing out the top. How much ? I know it shouldnt be doing it at all.


It drops about 4 drops per night on the floor.

Offline Mksmark

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Re: RDU puking oil again
« Reply #6 on: January 21, 2022, 02:04:44 PM »
how much fluid are you adding, and what fluid exactly are you using in the RDU?




Not adding any since the cleanout with rear cover removal. Motorcraft 80w-90 rear axle lubricant.


Offline Mksmark

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Re: RDU puking oil again
« Reply #7 on: January 21, 2022, 02:06:12 PM »
Just out of curiosity .. is it cloudy? (contaminated?)


No its clear but is coming out the top of the breather.

Offline jman

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Re: RDU puking oil again
« Reply #8 on: January 21, 2022, 03:39:43 PM »
I had a bad breather on a Sienna AWD, dealer wanted to replace axle seals for more than $1k. I'm thinking that if your breather is not opening at the right internal pressure (caused by heat and expansion), it might be spilling out oil if it only opens at an "elevated" pressure. If that is the case, all you need is to get a new one.
Not sure if driving without it to test it will cause even more oil to leak out.

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Offline Mksmark

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Re: RDU puking oil again
« Reply #9 on: January 26, 2022, 08:50:25 PM »
Going to try that. I will see if I can remove it and clean it up as well or just replace it. I didn`t think there was any pressure there but who knows. Thanks for the help

Offline Mksmark

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Re: RDU puking oil again
« Reply #10 on: March 06, 2022, 03:07:17 PM »
Well before I could get to this problem, some idiot made a left turn right in front of my wife and now the car has $5000. worth of damage to the front end. She is fine.  I`m in the Chicago area and it looks like its going to take 3 months to get the dam thing fixed. I cant win.  :bangin:

Offline SHOdded

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Re: RDU puking oil again
« Reply #11 on: March 13, 2022, 07:13:46 AM »
ouch. hope you can figure rdu repair into the estimate ;)
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If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

 


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