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That looks kind of red like tranny fluid, but hard to tell for sure from that picture. The stained part ot the top of the pic looks like a lighter fluid than oil. Hope they get this figured out for you, and do it correctly this time.
Dealer called back, still diagnosing it but said there was low or none (can't remember) coolant in the reservoir by the turbos. If that's the case, it makes sense that the tranny was overheating since that reservoir controls the tranny and the intercooler. But that's pretty odd, it's a closed system. Also no dash messages since that reservoir doesn't have sensors. So wonder if there is a leak or something. Dealer topped it off and will leave it for days, probably to see if coolant seeps out. Shouldn't the dealer have topped it off once the suspension work was finished on my car? Also, which reservoir cools the turbos, I hear it's the main engine reservoir, which was full.
This overheating happened to mine after the RMS was fixed incorrectly. They did end up replacing the tranny basically. Good luck.
How did they replace tranny, that's a big repair. Was there damage? What was damaged? Mine was only like a day or so. No fault codes and shifting was normal
This overheating happened to mine after the RMS was fixed incorrectly. They did end up replacing the tranny basically. Good luck.
How many miles were on your car when you had the RMS replaced? And how did you know it needed replacing? Was it in for service, or did you see oil in the garage? And were you under warranty at th time? Thanks
How many miles were on your car when you had the RMS replaced? And how did you know it needed replacing? Was it in for service, or did you see oil in the garage? And were you under warranty at th time? Thanks
I saw oil on garage floor, so I'm guessing it's that. Hopefully cpo warranty will cover. Should get a response back today. Looks slightly red tbh now that u mention it.
I saw oil on garage floor, so I'm guessing it's that. Hopefully cpo warranty will cover. Should get a response back today. Looks slightly red tbh now that u mention it.
Dealership called, rear main seal issue. CPO covered.
Anything else that must be changed?
Wait...what??? The quesion I posed above about the RMS was for @Horseford . I had no idea you had an RMS issue.
Are you saying they found that your RMS has blown???? If so, are they going to also replace the oil vapor separators????
I was complaining of heating trans and an oil leak. Took to the dealership last week. They called today and said ur rear main seal is leaking. Cpo covered. They are still investigating the crankshaft unit or something (i guess the oil separators). 10k repair if oil separators are included.
I was complaining of heating trans and an oil leak. Took to the dealership last week. They called today and said ur rear main seal is leaking. Cpo covered. They are still investigating the crankshaft unit or something (i guess the oil separators). 10k repair if oil separators are included.
Welp, I guess the good news is you should have a fully sorted car by the time they are done with it.
Rear main seal ? I am struggling with that diagnosis. The oil I saw was at the front of the engine bay being slung around the serpentine belt. I am not visualizing the path the oil would take to get from your rear main seal, up to the serpentine belt area.
If there are no more oil stains on your garage floor, then maybe they did rectify the leak. But it wouldn’t hurt to keep an eye on the floor for a time.
Rear main seal ? I am struggling with that diagnosis. The oil I saw was at the front of the engine bay being slung around the serpentine belt. I am not visualizing the path the oil would take to get from your rear main seal, up to the serpentine belt area.
If there are no more oil stains on your garage floor, then maybe they did rectify the leak. But it wouldn’t hurt to keep an eye on the floor for a time.
Dealership saw additional leaks while parked. Obviously can't prove it.
A leaking rear main seal on the engine cannot cause high oil temperatures for the transmission.
There are multiple issues. 15-20 minutes is very fast for the transmission to be getting that hot. In 110 degree ambient temperatures I don’t see 220 for the transmission unless I’m being a savage for extended periods of time. Engine oil temperature should go up faster.
A leaking rear main seal on the engine cannot cause high oil temperatures for the transmission.
There are multiple issues. 15-20 minutes is very fast for the transmission to be getting that hot. In 110 degree ambient temperatures I don’t see 220 for the transmission unless I’m being a savage for extended periods of time. Engine oil temperature should go up faster.
Generally when a planetary gear set automatic is low on fluid it will slip. No dipstick for the transmission makes it less than convenient to check that fluid level. I’m not familiar enough to say if there is a thermostat controlling trans oil getting to the cooler. MB will figure it out.
Generally when a planetary gear set automatic is low on fluid it will slip. No dipstick for the transmission makes it less than convenient to check that fluid level. I’m not familiar enough to say if there is a thermostat controlling trans oil getting to the cooler. MB will figure it out.
Annoying that there is no built-in level sensor either otherwise you could probably check with XENTRY, but ... nope.
Car has returned. They replaced rear main seal, 2 oil separators. All under CPO warranty. All in all ~ $10500. Attach picture of work history. High trans temp didn't show up either.
Question
Did they fully drain the trans oil and refill or just a top off?
What would the residue in the engine oil be?
Last edited by Vanquish59; Mar 14, 2025 at 10:02 PM.
Car has returned. They replaced rear main seal, 2 oil separators. All under CPO warranty. All in all ~ $10500. Attach picture of work history. High trans temp didn't show up either.
Interesting they mention removal of the transmission pan to do a rear main seal in the engine.
Remove all four struts? Sure seems like exhaust can come out without all the above mentioned drama..... I really doubt exhaust is one piece from cats to tailpipes. Sure reads as a good deal for the dealership at $250 or more/hour.
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