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Rear Main Seal concern??? #4725745
04/13/18 11:33 AM
04/13/18 11:33 AM
Joined: Feb 2018
Posts: 509
Chester County/Pa.
BAJA_05 Offline OP
BAJA_05  Offline OP
Joined: Feb 2018
Posts: 509
Chester County/Pa.
Getting ready to purchase my neighbors 2000 Dodge Ram 4WD 5.2L with the automatic transmission/overdrive tomorrow when he has off work in the morning. He is the original owner and its parked with exactly 93,014 original miles. Climbed underneath it today and noticed the rear main seal has small drops on it. He says he ran exclusively PYB 10W30 with a Mopar filter his whole ownership. What kinda job is it to replace a RMS or would throwing high mileage oils at it be my best bet for now? Does Liquid Moly not also make a product specifically for RMS leaks?

Note -- he bought a brand new 2018 Jeep Cherokee and his wife no longer wants the truck sitting in the driveway. I offered him $2500.00 and he said, "done deal!!!"

Dale

Last edited by BAJA_05; 04/13/18 11:36 AM.

2017 VW Jetta SE TSI 1.4L Turbo (hers)
M1 Euro 0W40 & FU (19K)
2008 Acura TL 3.2L PPPP 0W20 & FU (108K)
2005 Subaru Baja AWD 2.5L N/A 5spd.
QSHM 5W30 & FU (96K)
2000 Ram 4X4 5.9L (93K) PYB 10W30 & FU
Re: Rear Main Seal concern??? [Re: BAJA_05] #4725756
04/13/18 11:42 AM
04/13/18 11:42 AM
Joined: Mar 2017
Posts: 676
West Ma.
rollinpete Offline
rollinpete  Offline
Joined: Mar 2017
Posts: 676
West Ma.
You could try using some HM oil and it may stop.
Replacing the seal involves a lot of work, at the minimum transmission has to come out along with the transfer case.


Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive185k miles
Last Change;
50/50 QSUD, QSHM. 5w30
Fram XG8A, Fram CA8141

Currently under the influence of oil shocked2

Re: Rear Main Seal concern??? [Re: BAJA_05] #4725758
04/13/18 11:42 AM
04/13/18 11:42 AM
Joined: Aug 2009
Posts: 3,293
Ohio
Tdbo Offline
Tdbo  Offline
Joined: Aug 2009
Posts: 3,293
Ohio
You could try some HM in it and see if it makes a difference.
IMO, it makes more sense to monitor it, and if it is "only a few drops,"
top off if necessary.
That's what I do on my '03.
Doesn't make sense on an 18 year old truck to replace it unless the leakage becomes severe, or other repairs make the replacement feasible.


2012 Honda Accord LX-P 94K
2008 Ford Mustang Pony Package Convertible 17K
2006 Honda Odyssey EX-L 76K
2003 Ford Ranger 3.0 Supercab 113K
Re: Rear Main Seal concern??? [Re: BAJA_05] #4725768
04/13/18 11:49 AM
04/13/18 11:49 AM
Joined: Jun 2012
Posts: 1,758
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,758
USA
Valvoline MaxLife High Mileage 10W30 would be my choice for the rest of it's life.


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: Rear Main Seal concern??? [Re: BAJA_05] #4725784
04/13/18 12:05 PM
04/13/18 12:05 PM
Joined: Jan 2011
Posts: 2,826
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,826
N.Ohio
For a few small drops, I would do nothing until it puddles on the driveway.


The "thinking" man's friend.
Re: Rear Main Seal concern??? [Re: BAJA_05] #4725792
04/13/18 12:14 PM
04/13/18 12:14 PM
Joined: May 2010
Posts: 2,119
Illinois, U.S.A
RamFan Offline
RamFan  Offline
Joined: May 2010
Posts: 2,119
Illinois, U.S.A
Do 2-3 OCIs with a HM oil and see if that stops the leak. The cost difference is negligible if you buy on a sale/clearance.


18 Giulia Ti Sport Q4
+2.0l turbo - 4k - PP Euro LX 0w30 - Mopar - 10k/1yr
16.5 CX-5 Touring AWD
+2.5l - 50k - SynPower w/ Maxlife 0w20 - PureOne - 8k/1yr
Re: Rear Main Seal concern??? [Re: BAJA_05] #4725793
04/13/18 12:15 PM
04/13/18 12:15 PM
Joined: Jun 2009
Posts: 3
Riverside, CA
WhiteLX Offline
WhiteLX  Offline
Joined: Jun 2009
Posts: 3
Riverside, CA
Rear main seals are cheap, usually only a few bucks. The problem is the labor involved as the transmission must come out to change the seal. I had a bad rear main leak on the Explorer I purchased in October. I researched a lot on stop leaks and tried blue devil rear main sealer along with 10w30 Maxlife. Within 3K the leak has been greatly reduced. I used to have a large puddle under the engine. Now it's just a tiny spot, if any.

For a few small drops I'd agree, start with Maxlife and go from there.


1992 Mustang 5.0L notchback - turbocharged
1986 Merkur XR4Ti - 2.3L turbo
1998 Ford Explorer 5.0L
2006 Toyota Corolla
Re: Rear Main Seal concern??? [Re: BAJA_05] #4725794
04/13/18 12:15 PM
04/13/18 12:15 PM
Joined: Aug 2008
Posts: 3,231
Where the wind comes sweepin'
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,231
Where the wind comes sweepin'
Don't plan on fixing a RMS leak with chemicals. Decide if you can live with it or maybe you have the resources to fix it yourself.

I just got in the habit of keeping a drip tray under the truck when it was parked and checked the oil level often. Surprisingly even with the leak being about a half teaspoon a day the oil level never dropped noticeably in 5k OCIs.

Re: Rear Main Seal concern??? [Re: BAJA_05] #4725812
04/13/18 12:32 PM
04/13/18 12:32 PM
Joined: Jun 2003
Posts: 17,814
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,814
Deplorable in apple valley, ca
The oil pressur sender is on the rear of the engine, behind the distributer. It may be leaking and running down.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Rear Main Seal concern??? [Re: BAJA_05] #4725824
04/13/18 12:55 PM
04/13/18 12:55 PM
Joined: Mar 2017
Posts: 676
West Ma.
rollinpete Offline
rollinpete  Offline
Joined: Mar 2017
Posts: 676
West Ma.
Another (senerio) is the oil red?, could be the transmission fluid.


Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive185k miles
Last Change;
50/50 QSUD, QSHM. 5w30
Fram XG8A, Fram CA8141

Currently under the influence of oil shocked2

Re: Rear Main Seal concern??? [Re: rollinpete] #4725867
04/13/18 01:43 PM
04/13/18 01:43 PM
Joined: Feb 2018
Posts: 509
Chester County/Pa.
BAJA_05 Offline OP
BAJA_05  Offline OP
Joined: Feb 2018
Posts: 509
Chester County/Pa.
No, its not red -- its motor oil.


2017 VW Jetta SE TSI 1.4L Turbo (hers)
M1 Euro 0W40 & FU (19K)
2008 Acura TL 3.2L PPPP 0W20 & FU (108K)
2005 Subaru Baja AWD 2.5L N/A 5spd.
QSHM 5W30 & FU (96K)
2000 Ram 4X4 5.9L (93K) PYB 10W30 & FU
Re: Rear Main Seal concern??? [Re: BAJA_05] #4725873
04/13/18 01:50 PM
04/13/18 01:50 PM
Joined: Jan 2008
Posts: 10,956
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,956
OH
I'd leave it and use red bottle Maxlife. May want to replace the pcv valve with an oem unit as well.

I had a 99 Accord 4cyl that had a oozing rms. First Honda dealer quoted $700, second dealer quoted $500. Contacted Honda and they agreed to pay half. So cost $250 but afterwards noticed a flare from 1st to 2nd gear. They did a drain and fill on the trans which took care of that. In hindsight I would have left it alone.

Re: Rear Main Seal concern??? [Re: BAJA_05] #4725941
04/13/18 03:10 PM
04/13/18 03:10 PM
Joined: Nov 2008
Posts: 3,277
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,277
Oshawa, Ontario Canada
+1 on maxlife high mileage oil. I would also add a bottle of liqui Moly motor oil saver and see if that stops it.

https://www.amazon.com/Liqui-Moly-2020-Motor-Saver/dp/B00CPL8WY8


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: Rear Main Seal concern??? [Re: BAJA_05] #4726010
04/13/18 04:39 PM
04/13/18 04:39 PM
Joined: Nov 2004
Posts: 1,854
SD
zrxkawboy Offline
zrxkawboy  Offline
Joined: Nov 2004
Posts: 1,854
SD
Since he has always used PYB, I'd try some PHM 10W30 for a couple of OCIs. BTW, I think you got a great deal on that truck, especially since it's a one-owner vehicle!


"Think of all the Ford owners who will someday want an automobile." John Dodge

Re: Rear Main Seal concern??? [Re: BAJA_05] #4726022
04/13/18 04:54 PM
04/13/18 04:54 PM
Joined: Nov 2006
Posts: 20,566
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,566
MA, Mittelfranken.de
I wouldn't put anything in the oil or run a HM oil, just keep an eye on it. If all else fails park it nose down and when you cant throw this under it. Sounds funny but not kidding.




ASE L1, Master. Deutsch Meisterbrief.
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