98' TJ wranger 4.0 AUTO-TRANS LEAK! - Page 2 - Jeep Wrangler Forum
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Old 08-14-2010, 07:16 AM   #31
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Had me abit cornfused.I thought he went really deep into that seal r+r!

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Old 08-14-2010, 03:04 PM   #32
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yea, im gonna change mine out but was reading that and was about to second guess that one

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Old 08-14-2010, 03:34 PM   #33
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Also put some grease on the splines. I have seen them stripped out. They get dry and rusty.
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Old 08-16-2010, 06:45 PM   #34
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Hey sorry for that torque converter typo!
I typed it up from memory in like 2 minutes. It was actually very easy and straight forward! I can only imagine how much money i saved compared to bringing it into the jeep dealership or a tranny shop.




On a more funny note, that Torque converter typo must have doomed me because now i have a little leak from the Torque converter seal. Nothing to really worry about but its annoying! I would have to pull the whole transmission out to get to that huh?
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Old 08-16-2010, 07:25 PM   #35
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Quote:
Originally Posted by diyengineer View Post
... now i have a little leak from the Torque converter seal. Nothing to really worry about but its annoying! I would have to pull the whole transmission out to get to that huh?
Yep, unless you can do a "Honey I shrunk the kids" thing and make yourself REALLY small so you could get up in there.
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Old 08-16-2010, 09:19 PM   #36
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Quote:
Originally Posted by diyengineer View Post
Hey sorry for that torque converter typo!
I typed it up from memory in like 2 minutes. It was actually very easy and straight forward! I can only imagine how much money i saved compared to bringing it into the jeep dealership or a tranny shop.




On a more funny note, that Torque converter typo must have doomed me because now i have a little leak from the Torque converter seal. Nothing to really worry about but its annoying! I would have to pull the whole transmission out to get to that huh?
well i would be happy with a small leak right now...gonna take off a day and have a go at it probably next week...and your step by step is gonna be a huge help!!!
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Old 08-17-2010, 07:42 PM   #37
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ok, im starting this adventure...question??? I couldnt really tell by the pic, do you take the transfer case off and leave the adapter on the back of the trans or did you remove the bolts at the adapter and take the adapter and transfer case off all together.????..thanks
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Old 08-18-2010, 12:04 AM   #38
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ok, im starting this adventure...question??? I couldnt really tell by the pic, do you take the transfer case off and leave the adapter on the back of the trans or did you remove the bolts at the adapter and take the adapter and transfer case off all together.????..thanks
You take the transfer case off. leave the adapter connected to the transmission.
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Old 08-23-2010, 06:42 PM   #39
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I have an annoying tranny fluid leak my self havnt wrked on it yet but when I do I hope I dnt have the same trouble as u all did
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Old 08-24-2010, 07:33 PM   #40
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I have an annoying tranny fluid leak my self havnt wrked on it yet but when I do I hope I dnt have the same trouble as u all did
hopefully it isnt the same..you will know it if you do, I just walked out one day and had a massive BP type oil spill under and around the jeep
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Old 08-27-2010, 11:46 PM   #41
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ok, got the transfer case removed today THANKS DIYENGINEER the istructions were to the T not a difficult job at all. Removed seal and have new one ready to go in just looking for something right now to drive new seal in..ANY IDEAS with out buying specialty tool???
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Old 08-28-2010, 01:33 AM   #42
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I used a quill off a cnc machine i had taken apart that fit perfectly, it was meant to be haha (which im sure you wont have lying around). I was going to cut a piece of wood out. Just trace the seal to the wood with a pen or marker. Then use a pvc pipe to drive it in.=) You have to be crafty!

Between some cheap PVC pipe, wood, marker and cheap jig saw you should be good!
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Old 08-28-2010, 10:31 AM   #43
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It doesn't take much of a specialty tool to seat that kind of seal into place. The key thing to take your time on is simply getting it started all the way around. They can want to cock to one side when if you are not careful to stop when that happens, can ruin the seal. I have a very small smooth-faced hammer that I use to start my seals with a careful tap-tap-tap-tap gently all the way around until it finally starts seating squarely all the way around. Then you can either carefully continue with gentle taps with a small hammer (if that's all you have) until it bottoms out, or then use a big round flat disk the diameter of the seal to finish seating it. If you're careful, the hammer by itself can work... if you're gentle and careful to tap-tap-tap all the way around until it finishes seating. Just don't let it cock to one side which can kink and ruin the seal.
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Old 09-01-2010, 12:10 AM   #44
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OK, she is back on the road and the only thing leaking under it was the condinsation from the air conditioner after a long drive today...want to say thanks to everyones help on here..dont know how much I saved but I have spent less than 50 bucks fixin it...you guys saved me a lot and I really do appreciate all the help and advise..
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Old 09-01-2010, 01:22 AM   #45
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Nice and useful post.
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Old 10-05-2010, 11:40 AM   #46
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Ok, this post is great and has alot of information. Thanks, diyengineer! I have the same exact issue with leakage from the weep hole, but my leak must be from the Transfer Case input seal because I am getting fluid from my transfer case.

The pics and write up on this post are great, and took away any fears I had of doing this job myself. Also thx for the tip on replacing both seals while I am in there........I will do that!

I have the next 3 days off of work, hopefully I can get this knocked out and have my jeep back on the road.

again............great post!!
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Old 10-09-2010, 06:37 AM   #47
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Completed the job on my own in one afternoon. Jeep is back on the road! Thanks for the great information in this post!
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Old 10-09-2010, 07:36 AM   #48
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I did mine a few weeks ago, Everything went smoothly except when we dropped the skid plate the bolts came out really easy. I was fully expecting from all the horror stories that we'd break the nutserts or the bolts. Well, living in the rust belt I ended up pulling the threads off the inserts... Ended up tapping oversize and using larger bolts. Took longer to mess with that than actually fixing the leak.
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Old 01-31-2011, 04:28 PM   #49
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Great write up and description, but I have a few questions.

About this time last year I noticed the same type of leak under my TJ (4.0/Auto). Did some checking and it felt as if it was coming from the trans pan. I never felt anything on the top side of the lip and nothing up on the trans case anywhere.

I changed the filter, gasket and fluid, buttoned it back up and the next morning it was back. Not as bad, but still there. Torqued the bolts, checked back. Still there. Finally I pulled the pan again, saved the fluid, put another gasket on with some RTV along the perimeter. I also noticed that the pan had a slight bend in the are I was getting the leak from so I used a piece of wood and carefully tapped it until it looked a little more straight. Checked back. No leaks. Week later. No leaks. Year later. Leak.

I'm parking in the driveway now which is on an incline, so my first thought was left over fluid dripping from the skid plate. Got under again, looking for the weep hole and couldn't locate it. I did locate the area in which it LOOKS like it's comng from, and once again looks like it's center of the back edge of the pan, just like last time. I couldn't feel any on the upper lip, but did get a trace along the seal.

If you're looking at the bottom of the Jeep, starting from the front, it looks like the fluid is draining along the front side of the trans mount which is directly under the back lip of the pan.

Now, based on this description, is that the area that the weep hole is in or is it further back? My thought is, because of gravity, if the hole is further back, then it would leak behind the skid plate more.

So, am I looking at a detailed fix like the output shaft seal or something more like a bad pan?

Oh, yeah, it's got 90Kmiles +/-.
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Old 12-02-2011, 12:22 AM   #50
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Notice this.!.!.!

One of the first questions I asked when I baught my 98 Wrangler was is it auto or manual....It was Auto...This forum showed me that between late 97 and early 99 all the auto trannies have an open vaccume on the tranny just inside the bellhousing...The problem was corected in late 99 models. But for us who own them prior to this we need to drop the tranny and custumize a vacume tube that will be above water.... IE your problem is your tranny is sucking in water...Looks full, leaking everywhere, well find that hole or stay out of water...Its in this forum...The hole is in the top part of the tranny between the transfercase and tranny. I based my buying of an automatic on this because I knew I could fix it before there was a problem....I just wish I could find the thread right now....
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Old 09-07-2012, 10:48 PM   #51
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Been dealing with the same rear output seal leak since I purchased my jeep a few months ago. 99 TJ, 32RH transmission with the NP231 transfer case.

The first attempt at fixing this was with a seal from NAPA. No luck - ATF drips on the driveway the following day. My second attempt I used a different brand seal from AutoZone. Same thing, still leaking.

The seal on the transfer case shows no visible signs of wear or leaks. My leak looks identical to the photos on this post.

I ended up having a local jeep shop swap the seal out the other day. But I am unfortunately still suffering from this dreaded leak

Mechanic said everything else looked good (no excess play, grooves/dings in the metal housing where seal seats, etc.).

I will not be able to get the jeep back down there for him to take another look until next week.

Do any of you have any input on whether or not something else could be causing these seals to fail, or causing the fluid to bypass the seal somehow? I made sure to take extra precautions when seating the seal, as well as greased up the inside portion of seal before mating transfer case back on. I am at a loss and very bummed out that I cannot get this leak fixed.

Thanks for any and all help.
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Old 12-28-2012, 01:01 PM   #52
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Know I'm knocking on an older thread but thanks to all the help, I was able to successfully complete this job yesterday on my 2000 4.0 auto! Woke up this morning hoping not to find any tranny fluid under my rig and sure enough, dry as a bone thanks for all the help jeepers.

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