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Pink fluid leaking

qqragoon

Member
Nov 11, 2015
22
6
United States
Just picked up a brand new 90D yesterday. Found pink fluid leaking (fresh) in the garage after I parked for 20 minutes today after driving back. It is from the center of the car near rear motor/wheels. I can see liquid dripping mark underneath the black bottom panel. Has anyone experienced this or know what this might be?

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StaceyS

Member
Jul 10, 2015
210
49
Bend, OR United States
My guess is its gear oil from the differential, possibly through a bad shaft seal. Call your Service Center. Its easy to verify, the bottom panels come off pretty easy and the drive shafts are all visible.
 

sorka

Well-Known Member
Feb 28, 2015
8,159
5,934
Merced, CA
I just had a diff leak fixed but the gear oli was golden like regular gear or engine oil.

It looks like trans fluid but that can't be since you don't have any such fluid in the car. My sneaking suspicion is battery coolant.

The location you describe though is where you'd have a diff leak. Maybe the gear oil is different in thew newer Ds.
 

apacheguy

S Sig #255
Oct 21, 2012
5,085
1,246
So Cal
Wk057 drained the coolant from the battery pack he disassembled. IIRC, it was a deeper blue/turquoise color. Plus, the spring loaded coolant disconnects are closer to the front than the rear of the car.
 

sorka

Well-Known Member
Feb 28, 2015
8,159
5,934
Merced, CA
Some past posts report that the differential fluid is in fact transmission fluid. I wonder if the fact my diff fluid is not pink but light golden is related to my MS being a P85D. Perhaps the extra torque requires a heavier fluid.
 

AWDtsla

Active Member
Mar 3, 2013
4,266
3,960
NE
Some past posts report that the differential fluid is in fact transmission fluid. I wonder if the fact my diff fluid is not pink but light golden is related to my MS being a P85D. Perhaps the extra torque requires a heavier fluid.

Does it have a sulfury smell? Then it's probably gear oil.
 

hpjtv

Member
Jul 5, 2014
139
31
Langley, BC, Canada
I broke my radiator that stores the battery coolant at the beginning of the year. The fluid was green. If the coolant is low, you will get a coolant warning on the dash. It ended up leaking completely empty by the time I was a few km from the service center. The car went into reduced power and limited the battery output eventually stopping the car dead. You do get a few seconds warning to pull over before it dies. Once things cooled for a few minutes, I was able to move again for short distances until it heated up again. Was able to make it to the SC.
 

qqragoon

Member
Nov 11, 2015
22
6
United States
Does it have a sulfury smell? Then it's probably gear oil.

It does not have any sulfury smell or any other smell. Maybe the car is too new to have any smell?


I broke my radiator that stores the battery coolant at the beginning of the year. The fluid was green. If the coolant is low, you will get a coolant warning on the dash. It ended up leaking completely empty by the time I was a few km from the service center. The car went into reduced power and limited the battery output eventually stopping the car dead. You do get a few seconds warning to pull over before it dies. Once things cooled for a few minutes, I was able to move again for short distances until it heated up again. Was able to make it to the SC.

Then, it definitely not the battery coolant. I didn't get any warning on the dash board.
 

islandbayy

Active Member
Feb 25, 2013
2,654
1,031
Greendale, Wisconsin
Just picked up a brand new 90D yesterday. Found pink fluid leaking (fresh) in the garage after I parked for 20 minutes today after driving back. It is from the center of the car near rear motor/wheels. I can see liquid dripping mark underneath the black bottom panel. Has anyone experienced this or know what this might be?

View attachment 100825View attachment 100824
They use standard ATF in the drive unit. Contact tesla service ASAP.
 

qqragoon

Member
Nov 11, 2015
22
6
United States
Issue UPDATE:

Came in to the service center and they took a look at the leaking. I was told the leaking was from the seal between the right-side axle and the gear unit. The fluid was the gear oil which is red color and becomes pinkish on the ground.

They are taking the entire rear drive unit out to inspect since this is a very rare issue happens on a brand new delivery. I was kinda surprised a seal broken on a 24 hours new Tesla... :crying:
 

sorka

Well-Known Member
Feb 28, 2015
8,159
5,934
Merced, CA
Issue UPDATE:

Came in to the service center and they took a look at the leaking. I was told the leaking was from the seal between the right-side axle and the gear unit. The fluid was the gear oil which is red color and becomes pinkish on the ground.

They are taking the entire rear drive unit out to inspect since this is a very rare issue happens on a brand new delivery. I was kinda surprised a seal broken on a 24 hours new Tesla... :crying:

It's not rare. It happened to me just last month. They replaced both seals without removing the DU. The tech theorized that the DU had been overfilled at the factory.

If you they remove your DU, make sure to have them show you the wheel alignment sheet afterwards.

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sorka

Well-Known Member
Feb 28, 2015
8,159
5,934
Merced, CA
They did. Mine was not as heavy drained as yours...
So, you have the same seals broken on both side?

Yes, both seals were leaking although the drivers side was worse than the passenger side.

The thing is, with the way the cover fits underneath the DU, you could have a very slow leak forever and never see a single drop on the ground. The raised half hexagons can catch a lot of fluid before they ever leak out through those seep holes. I only noticed it because I removed the cover out of curiosity to look around.
 

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