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Old 09-23-2008, 12:11 PM   #1
Sb5551's Avatar
Join Date: Feb 2008
Location: South Philadelphia
Posts: 2,077

Ok, so I was finally told to fix the leaks in my jeep because it is ruining the new driveway.

I am going to replace the water pump this weekend and possibly the oil pan and rear main depending on how good im feeling.

I have two questions on some other parts that are leaking right now. The pinion seal is leaking on my dana 30. How difficult would this be to replace? I can have access to the tool to measure the turning torque, is there a write up somewhere?

The other leak is a major one coming from underneath skidplate. I have a 4.0 with a manual trans. The leak is definatlly oil. Only the front half of the skid plate is wet, and I belive it started when I changed the trans fluid because it looked like it had never been changed before. Anything I should look for when I drop the plate this weekend? Are there common problems in this area of a jeep? Oh yea the jeep is a 97 with 140,000 miles.

Sorry for the long post.

No more jeep for now
But I have free kandy and kittens in the back of my van

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Old 09-23-2008, 01:17 PM   #2
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Join Date: Mar 2007
Location: Pocono mountains
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The first thing I would check would be the valve cover, you really need to clean the motor before finding it though and remember oil always leaks down not up.
As for the tranny leaking, usually they don't, unless you overfilled it somehow like pouring the lube in from the removed shifter or having it pointing nose downhill too much, usually it's the transfer case rear seal that leaks. As for doing the pinion seal, personally I would take it to a drive shop, you do it wrong and it's some big bucks to fix it. There is also the issue of torquing the pinion back on, 250ft lbs comes to mind and thats one heck of a big pry bar on the torque wrench. The other place it can leak is the O rings in the oil filter mounting boss, jeep sells a kit for that.

For driveline stuff I go to performance driveline down the street from Blue Mountain Ski area up here in the pocono's.

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Old 09-23-2008, 01:20 PM   #3
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Join Date: Mar 2008
Location: Burlington, KY
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i have a 2000 with 160k and have had no such problem. nor have i heard of it being a common issue. this may sound trivial but it happened. my buddy got hung up pretty bad on a trail, and banged pretty hard when we finally got him out. ended up denting the pan right on the drain plug but you could barely see it. i guess it threw the seal of the plug off just enough to leak pretty good. just a crazy thought though. ive been staring at this screen too long at work.
-97 Sport, 5spd, D30/35, Zone 4.25 combo, 33x12.5x15 Hercules Trail Diggers on Pro Comp steelies
-[Stolen/Totaled]00 TJ Sport, 4.0L, 5spd, D30 - D44, 31x10.5 Dunlop Mud Rovers, 2" Skyjacker BB w/Hydro 7000 shocks
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Old 09-23-2008, 03:33 PM   #4
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Location: South Philadelphia
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The valve cover is not leaking I already checked that after I washed the motor and drove for a little; however, I did not think of the o-rings in the oil filter mounting boss. What is this kit? I am guessing it is more than just the o-ring that comes with an oil filter.

As for the 250 ft/lbs, I believe that that is for if one is installing a new crush sleeve. I was planning on using the same crush sleeve and just setting the turning torque not tearing into the axle. Maybe it would be safer to ask around though. Thanks again.
No more jeep for now
But I have free kandy and kittens in the back of my van

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