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Topic Review (Newest First)
03-25-2013 01:05 PM
tangofox007
Quote:
Originally Posted by doclouie View Post
Dealer did the change out under warranty and they said it was almost a grand because it was a one piece seal and they needed to pull the tranny.
If your '91 XJ had a 4.0L engine, it did not have a one piece seal. If it did have a one piece seal, it did not have a 4.0L engine. There are no other possibilities.

Here is the Fel-Pro parts listing for a '91 XJ. Take a look and see how many one piece rear main seals you see for the 4.0L engine.

Federal-Mogul Resource Center - Vehicle Look-up

If you insist on subscribing to the theory that "The dealer said it, so it has to be true," have at it. Dealers love folks like you. It just proves my point that dealers hoodwink those who don't know any better.

Just recently, I repaired a Ford steering column with a $12 part. Dealer swore to the owner that the part was NLA and the entire steering column had to be replaced, for $950. And they charged him $80 to tell him that lie. That's what dealers do.

And, the ironic things was, that dealer's very own parts department had the $12 part in stock. And the parts man knew what I was talking about before I even finished with the part number. "We sell those all the time," he said.
03-25-2013 12:38 PM
doclouie Dealer did the change out under warranty and they said it was almost a grand because it was a one piece seal and they needed to pull the tranny.
03-23-2013 05:13 PM
f9k9 OMG, this is the exact reason why I recommend that newbie 4.0 owners seek answers anywhere else but, here. We have a moderator that may have misspoke and refuses to admit to a small mistake that, everyone does on occasion.

Refuses to admit the mistake, refuses to support his claim and then refuses to discuss the issue any longer.

I replaced my two piece 1991 XJ's rear main seal 2Xs and I was never asked for a particular build date when, I purchased the seals from a dealer.

I gotta call BS on this thread.
03-23-2013 04:14 PM
Offrd
Quote:
Originally Posted by doclouie View Post
You are wrong. I owned a 1991 XJ and it did have a 1 piece rear main seal that I had the dealer change out because of the labor and yes it was an inline 6.
I looked this up only because I was curious.
Seal, Crankshaft Rear 4778126

I do know that there were rear main seals that required to take off the flywheel and install a one piece seal. I don't remember which vehicle it was though. Doesn't look like a Jeep from here.
03-23-2013 04:07 PM
tangofox007
Quote:
Originally Posted by doclouie View Post
I see from your past experiences that you like to stir things up and I will not be sucked into that.
Who was it that took it upon himself to "correct" the accurate information that I had provided? I am more than happy to "stir things up" when that happens.

Quote:
Originally Posted by doclouie View Post
Believe me or not I do not care.
That is completely believable. Folks who care don't post erroneous and misleading information. And then refuse to recognize the correct answer when told.
03-23-2013 03:34 PM
doclouie
Quote:
Originally Posted by tangofox007 View Post
In that case, it should be no problem for you to post the part number for that one piece Jeep 4.0L rear main seal.

Looks like hoodwinking customers is a common dealership tactic; they got you!!!
I am done with this conversation. I see from your past experiences that you like to stir things up and I will not be sucked into that. Believe me or not I do not care. Have a great day.
03-23-2013 03:13 PM
jeepwayoflife I ended up putting me replacement off for a while. The leak seems to have really slowed down, only a few drops after sitting all night and oil level stays normal. The leak must have gotten plugged with some gunk buys me some time to save money for the replacement. The shop down the street from me will do it for $400 and I'm bringing the oil I like.
03-23-2013 02:50 PM
tangofox007
Quote:
Originally Posted by doclouie View Post
You are wrong. I owned a 1991 XJ and it did have a 1 piece seal that I had the dealer change out because of the labor and yes it was an inline 6.
In that case, it should be no problem for you to post the part number for that one piece Jeep 4.0L rear main seal.

Looks like hoodwinking customers is a common dealership tactic; they got you!!!
03-23-2013 02:42 PM
doclouie
Quote:
Originally Posted by tangofox007 View Post
No XJ with a 4.0L engine featured a one piece rear main seal. (Maybe you are thinking of the "inline 6" that had only four cylinders!!!)

If you don't have time to "waste" determining the facts, perhaps you should allocate less time to supplying erroneous information.
I owned a 1991 XJ and it did have a 1 piece rear main seal that I had the dealer change out because of the labor and yes it was an inline 6.
03-23-2013 02:07 PM
tangofox007
Quote:
Originally Posted by doclouie View Post
I am not going to waste my time on your challenge as I have better things to do. You can research it out if you really care, but I am sure you are just trying to stir the pot. The 1991 XJ is one example I know for sure.
No XJ with a 4.0L engine featured a one piece rear main seal. (Maybe you are thinking of the "inline 6" that had only four cylinders!!!)

If you don't have time to "waste" determining the facts, perhaps you should allocate less time to supplying erroneous information.
03-23-2013 01:59 PM
doclouie
Quote:
Originally Posted by tangofox007 View Post
Talk is cheap. Show me in writing.
I am not going to waste my time on your challenge as I have better things to do. You can research it out if you really care, but I am sure you are just trying to stir the pot. The 1991 XJ is one example I know for sure.
03-23-2013 01:51 PM
tangofox007
Quote:
Originally Posted by doclouie View Post
That actually is true, depending on the year of the inline 6. Some had two piece seals and some had one piece seals. I do not remember which year is which though.
Talk is cheap. Show me in writing.
03-23-2013 12:03 AM
outofmoney Check to make sure your oil pan bolts are tight. I thought my rms was bad too but, turned out the leak was at the rear of oil pan!
03-22-2013 11:39 PM
SurfKaster I'd lean toward a reputable shop over a dealer unless you just have spare $$$ to burn.
03-22-2013 11:38 PM
doclouie
Quote:
Originally Posted by tangofox007 View Post
One forum participant recently reported that her dealer insisted that the transmission had to be removed to replace a 4.0L rear main seal.

Is it something any shop can do? That's a lot like asking if any restaurant can do steak and lobster. In the final analysis, it's a very low tech job, but it does require attention to detail. And you can't get that everywhere.
That actually is true, depending on the year of the inline 6. Some had two piece seals and some had one piece seals. I do not remember which year is which though.
03-22-2013 09:33 PM
tangofox007
Quote:
Originally Posted by dbsanders View Post
Sorry to resurrect a thread. Mine is leaking just a drop a day or so. If I wanted to have a shop do it, is it really something any shop can do, or would the dealer really be better?
One forum participant recently reported that her dealer insisted that the transmission had to be removed to replace a 4.0L rear main seal.

Is it something any shop can do? That's a lot like asking if any restaurant can do steak and lobster. In the final analysis, it's a very low tech job, but it does require attention to detail. And you can't get that everywhere.
03-22-2013 09:14 PM
dbsanders
Shop or Dealer for RMS?

Sorry to resurrect a thread. Mine is leaking just a drop a day or so. If I wanted to have a shop do it, is it really something any shop can do, or would the dealer really be better? The DIY I've read had such strong cautions about scoring the metal and getting the surfaces absolutely 100% clean, I'm a bit scared to take it somewhere that might not be as familiar with this engine.
03-12-2013 09:58 AM
jeepwayoflife I was thinking about that, but I switched to synthetic over a year and a half ago and no leaks until now. I'm due for an oil change anyway so I guess I will try dino oil and see how it does.
03-12-2013 07:55 AM
Soli Deo Gloria About running synthetic oil. I was talking to a friend of mine who restores cars and he told be that using regular oil is not at clean as synthetic (obviously) but because of that if there are small leaks it could plug and prevent it from leaking. After doing that and changing to synthetic it runs so clean and will clean out all those deposits from old oil and the possibility for leaks begin.

Just a thought
03-12-2013 01:27 AM
jeepwayoflife
Quote:
Originally Posted by migbuz View Post
OP. Are you sure it's not just a valve cover gasket? Oil will run down the back of the engine.
I was 99% sure my rms was leaking until I started reading a bunch of posts on this topic and decide to replace my valve cover gasket. Haven't seen an oil stain since.
I believe it is the rear main seal because more oil is coming out of the vent on the bottom of the bell housing than is dripping down the oil pan. While I feel comfortable doing most things on my jeep, I'm only in highschool and have never messed with an engine and if I did something to damage it I would have a real hard time coming up with the money to fix it. I would be fine removing the transmission, clutch, and oil pan, but I don't know how my inexperience would fair against the delicate seal and little retaining piece..
03-12-2013 12:41 AM
migbuz OP. Are you sure it's not just a valve cover gasket? Oil will run down the back of the engine.
I was 99% sure my rms was leaking until I started reading a bunch of posts on this topic and decide to replace my valve cover gasket. Haven't seen an oil stain since.
03-11-2013 11:44 PM
gquad41 Did mine one month ago and got all parts online for around 50 $ . I am handicapped and I did mine in 5-6 hrs fairly simple just follow on line videos .
03-11-2013 10:35 PM
Shark_13
Quote:
Originally Posted by tangofox007 View Post

Age can be just as significant a factor as mileage. And synthetic oil will leak where conventional oil will not.
Sounds crazy but true...i put synthetic in a mower once (don't ask why i dunno)...that thing leaked all over the garage floor. Put regular stuff in next season, not a drop on the floor.
03-11-2013 09:38 PM
SurfKaster I changed mine the other week. It really wasn't that bad, down time was maybe 5 hrs or so. I wouldn't do it without an impact wrench though, the exhaust bolts can be a bitch. You can also check the bolts on the oil pan closest to the seal. If they're loose the rear main can appear to be leaking. Also check your valve cover gasket. $400ish is about average for the rear main.
03-11-2013 09:16 PM
dale 3
Quote:
Originally Posted by UFOtestpilot View Post
Dino=organic. It is commonly attributed to the decay of dinosaurs that turned into oil deposits. Geologists now know it was actually algae.

Straight weight does not have a range eg; 10-30, but rather comes in straight weight eg; 30w, 50w, etc.
So it has something to do with FLINTSTONES,Hence DINO the dinosaur and his rotted POOP!
03-11-2013 09:04 PM
UFOtestpilot
Quote:
Originally Posted by jeepwayoflife View Post
Got a quote from the shop down the street from me for $425. Thanks for the help everyone!
I will spend an afternoon fumbling with a wrench laying in gravel before I'll pay someone $425 to do anything I can get done myself. Even if only half was labor (which I don't think it is) $212.50 a day is pretty good wages for me. If you have the coin and aren't inclined to mess with it take it to a reputable shop and be prepared for it to start weeping again long before you think it should.
03-11-2013 08:57 PM
UFOtestpilot
Quote:
Originally Posted by dale 3 View Post
What the hell is DINO oil? Straight weight? Flintstones
Dino=organic. It is commonly attributed to the decay of dinosaurs that turned into oil deposits. Geologists now know it was actually algae.

Straight weight does not have a range eg; 10-30, but rather comes in straight weight eg; 30w, 50w, etc.
03-11-2013 08:52 PM
dale 3
Quote:
Originally Posted by doclouie View Post
Change the oil to a dino oil and the leak may go away. It will not fix the problem, but it may make it not leak.
What the hell is DINO oil? Straight weight? Flintstones
03-11-2013 08:32 PM
doclouie Change the oil to a dino oil and the leak may go away. It will not fix the problem, but it may make it not leak.
03-11-2013 08:18 PM
jeepwayoflife Got a quote from the shop down the street from me for $425. Thanks for the help everyone!
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