Should I be Worried? See pic...

thefrog

Well-Known Member
First Name
Dan
Joined
Jun 2, 2018
Messages
45
Reaction score
32
Location
New Jersey
Vehicle(s)
JLUR 6 speed manual
Was at Rausch Creek yesterday doing some harder greens and lighter blues. Drove home this morning, 2.5 hours back to NJ. No issues on the drive home at all. Just smooth sailing.

Anyway when I got home, I did my usual full undercarriage inspection and discovered this dark fluid seeping (not dripping or leaking) from these 2 holes at the bottom of the manual transmission. I don’t know what they are or what they’re for...

Any thoughts?


IMG_6130.jpeg





Advertisement

 
Last edited:

fat_head

Well-Known Member
Joined
Mar 28, 2018
Messages
799
Reaction score
1,530
Location
Texas
Vehicle(s)
2018 JLU
Rear main seal. That's not from trail damage. Before you take it to the dealer you need to thoroughly wash under your Jeep. Those weasels at Jeep might deny your warranty claim if you've driven it in mud. Another member is going through that scenario right now.
 

DavidArmen

Well-Known Member
First Name
David
Joined
Sep 19, 2020
Messages
751
Reaction score
618
Location
Hollywood, CA
Vehicle(s)
2021 Red JLUR
Rear main seal. That's not from trail damage. Before you take it to the dealer you need to thoroughly wash under your Jeep. Those weasels at Jeep might deny your warranty claim if you've driven it in mud. Another member is going through that scenario right now.
Doesn’t the other member have an automatic tranny though? Not that it makes any difference.

And OP, yeah there’s obviously no signs of physical damage on the tranny case at all so you didn’t hit the tranny on any rocks, this had nothing to do with you.
 
OP
thefrog

thefrog

Well-Known Member
First Name
Dan
Joined
Jun 2, 2018
Messages
45
Reaction score
32
Location
New Jersey
Vehicle(s)
JLUR 6 speed manual
  • Thread starter
  • Thread Starter
  • #4
Thank you! I won’t be able to get it over for service for at least another week. I don’t know how long it’s been seeping like that but I guess I can presume that since there is no fluid on my driveway that I’ve got a bit of time yet… Hopefully.
 

nU7OuxIx

Well-Known Member
First Name
Mike
Joined
Jan 29, 2021
Messages
185
Reaction score
58
Location
Chicago
Vehicle(s)
2021 JLU Rubicon, YJ, Impreza
I've been following the other thread and was wondering what year JL you have and how many miles are on it?

On the 4.0's, this is pretty common. I haven't been following the 3.6's but it's starting to get a little concerning see these pop up week after week.
 
OP
thefrog

thefrog

Well-Known Member
First Name
Dan
Joined
Jun 2, 2018
Messages
45
Reaction score
32
Location
New Jersey
Vehicle(s)
JLUR 6 speed manual
  • Thread starter
  • Thread Starter
  • #6
I've been following the other thread and was wondering what year JL you have and how many miles are on it?

On the 4.0's, this is pretty common. I haven't been following the 3.6's but it's starting to get a little concerning see these pop up week after week.
It’s a 2018 3.6 / 22K miles.
 

RubiSc0tt

Well-Known Member
First Name
Scott
Joined
Jun 12, 2018
Messages
854
Reaction score
847
Location
Upstate NY
Vehicle(s)
2019 JLUR in Punk'n Orange
Build Thread
Link
Occupation
Turn Wrenches/ Write code
Now I'm going to have to check mine. Anyone know why the rear main seal is crapping out at less than 50k mi?

Also: link to the other thread?
 

fat_head

Well-Known Member
Joined
Mar 28, 2018
Messages
799
Reaction score
1,530
Location
Texas
Vehicle(s)
2018 JLU
Now I'm going to have to check mine. Anyone know why the rear main seal is crapping out at less than 50k mi?

Also: link to the other thread?
I couldn't find the thread I was specifically thinking about. I did a google search and found a whole handful of people with RMS leaks.

https://www.google.com/search?channel=fs&client=ubuntu&q=jeep+jl+rear+main+seal+warranty+mud

@thefrog One person said his was leaking because the dealer put way too much oil in during his/her oil change. Have you checked your oil level or had the oil changed recently?
 
OP
thefrog

thefrog

Well-Known Member
First Name
Dan
Joined
Jun 2, 2018
Messages
45
Reaction score
32
Location
New Jersey
Vehicle(s)
JLUR 6 speed manual
  • Thread starter
  • Thread Starter
  • #9
I couldn't find the thread I was specifically thinking about. I did a google search and found a whole handful of people with RMS leaks.

https://www.google.com/search?channel=fs&client=ubuntu&q=jeep+jl+rear+main+seal+warranty+mud

@thefrog One person said his was leaking because the dealer put way too much oil in during his/her oil change. Have you checked your oil level or had the oil changed recently?
It wouldn’t be engine oil right? It would be transmission fluid no?

In any case, yes the dealer overfilled by a full quart when I got my oil changed a couple of months ago. First thing I did was check it when I got home. I drove back there right away and demanded they drain it and start over, which they did. They are so bad they don’t even know it’s not a JK, so they automatically put 6 quarts in… idiots.
 

fat_head

Well-Known Member
Joined
Mar 28, 2018
Messages
799
Reaction score
1,530
Location
Texas
Vehicle(s)
2018 JLU
It wouldn’t be engine oil right? It would be transmission fluid no?

In any case, yes the dealer overfilled by a full quart when I got my oil changed a couple of months ago. First thing I did was check it when I got home. I drove back there right away and demanded they drain it and start over, which they did. They are so bad they don’t even know it’s not a JK, so they automatically put 6 quarts in… idiots.
Yeah, it's going to be engine oil. If you were to remove one of those two black plugs and put a borescope up there, you'd see where it was coming from. The engine and transmission mate at this junction with about 10 bolts. In simple terms, the output of the engine that turns the transmission, there's a seal there. That's called the rear main seal, and that's where it's leaking.
 

zeebo56

Well-Known Member
First Name
Zee
Joined
Mar 8, 2020
Messages
459
Reaction score
326
Location
los angeles
Vehicle(s)
2020 jeep wrangler unlimited sport
Vehicle Showcase
1
Is this something people can replace on their own if they needed to or is it pretty involved?
 

fat_head

Well-Known Member
Joined
Mar 28, 2018
Messages
799
Reaction score
1,530
Location
Texas
Vehicle(s)
2018 JLU
Is this something people can replace on their own if they needed to or is it pretty involved?
Oh it can be done in a driveway for sure. Woudnt be fun. It's a 10 hour job "book time" iirc.
 

zeebo56

Well-Known Member
First Name
Zee
Joined
Mar 8, 2020
Messages
459
Reaction score
326
Location
los angeles
Vehicle(s)
2020 jeep wrangler unlimited sport
Vehicle Showcase
1
Oh it can be done in a driveway for sure. Woudnt be fun. It's a 10 hour job "book time" iirc.
Dang that sucks

I'm always worried about stuff happening and having to deal with a dealer. I guess that's the name of the game when you do a lift, gears, skids, bigger tires, off-road, etc

I've gone in some pretty deep mud also up to the door edge so hopefully the rear main doesn't crap out anytime soon. I have 14.5k miles currently.
 

blnewt

Well-Known Member
First Name
Brad
Joined
Oct 8, 2018
Messages
4,098
Reaction score
4,032
Location
New Mexico
Vehicle(s)
2019 Jeep JL Sport S, 03 Toyota 4Runner, Infiniti G37, Toyota T100 (Retired 74 CJ-5, 80 CJ-7)
Oh it can be done in a driveway for sure. Woudnt be fun. It's a 10 hour job "book time" iirc.
Yeah, it's about a $700 dealer job, so probably about 6hrs. but that's if you have a lift and all the room that affords. My rubber caps have a bit of oil seepage, not enough to be too concerning yet. I've got 20k on my 2019 V6. If the oil leaks to the point it's leaving drops in my garage, or worse I'll take it in. I've got the extended warranty for 8 years, 60k miles so I'll for sure get it replaced prior to that even if the leak stays at it's current state.
 

Mfarr75

Well-Known Member
Joined
Jul 2, 2020
Messages
231
Reaction score
688
Location
North Carolina
Vehicle(s)
2021 JLUS
I am seeing this only with the 3.6's. I wonder is the 2.0 a different RMS design, or maybe I am just not noticing any 2.0 complaints. Really seems to be a Pentastar thing.
 

Advertisement




Icon Vehicle Dynamics
 



Advertisement
Top