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Unread 08-03-2009, 12:31 PM   #1
rjs1956
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transmission pan leak

I just can't get my trans pan to stop leaking.Three times I have dropped the pan, changed the gasket, added silicon sealer, and reinstalled. I still have leaks.
The pan rim is not perfectly flat but I feel that I have done a good job banging it close to flat.

I am a novice mechanic. Are there techniques to using silicon sealer that I am not following? How flat must the pan rim be?

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Unread 08-03-2009, 04:25 PM   #2
greasefingers
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If I am using a cork or rubber gasket I do not RTV on it because I install the bolts with a torque wrench (150 in-lbs) But many people use a small bead on the pan side only.

Currently I am using a ridge type rubber encapsulate metal gasket. This can be removed and reused. I love that gasket
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Unread 08-03-2009, 08:10 PM   #3
Turbonut
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Make certain it's coming from the pan and not from above.
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Unread 08-03-2009, 10:26 PM   #4
elmer_fud
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I vote for trying a gasket.
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Unread 09-30-2009, 12:22 AM   #5
mrtosh
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Quote:
Originally Posted by greasefingers View Post
If I am using a cork or rubber gasket I do not RTV on it because I install the bolts with a torque wrench (150 in-lbs) But many people use a small bead on the pan side only.

Currently I am using a ridge type rubber encapsulate metal gasket. This can be removed and reused. I love that gasket
Can you get the ridge multi layer gasket be found at a parts store? Stealership?

Thanks in advance.
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Unread 09-30-2009, 02:38 AM   #6
jeepheller98
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also try grey RTV, it is more ridged. and has high oil resistance.. i used to use black on everything like diffs and such, but they would leak, i get no leaks with the grey
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Unread 09-30-2009, 11:00 PM   #7
Fireball027
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I am not sure if you have a zj or wj, but I had a leak on my zj that was driving me nuts. I thought it was the gasket, cause it was wet, but after leaving it on the hoist for a while I was able to pinpoint the leak. It was coming from the top of the transmission where the shifter mechanism enters the tranny and running down the side and around the gasket and then dripping from there.
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Unread 09-30-2009, 11:32 PM   #8
Mopargearhead
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What kind of Cherokee do you have and what transmission? If its a WJ with a 4.7L and a 545, you only use black RTV on the pan and no gasket. Any other transmission like the 42RE for instance, you can either use a cork gasket or a rubber reusable pan gasket with no silicone or any type of sealant. I have used the reusable gaskets at the dealership for years and never had an issue so those are the ones I prefer and recommend. If you have the 545 transmission make sure you clean the pan with brake cleaner to get all the oils and dirt off or else the silicone won't stick. Learned that the hard way when I first started working at the dealership.
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Unread 10-01-2009, 09:33 AM   #9
vansskaterfreek
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i have the 46RE and ive tried everything, i tried the reuseable, the cork, even the paper gasket, right now i have black silicone.. havent tried the gray yet... i was just going to buy a new pan, figured it was warped
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Unread 10-01-2009, 10:41 AM   #10
HighLonesome
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Had the same problem with my 46RH. Tried everything, even a new pan. Ended up being the seal for the shift rod, appearing to be a pan leak. It was a bear to replace with the motor out. It would take a magician to replace it normally.
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Unread 10-01-2009, 02:15 PM   #11
Mopargearhead
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I've never run into a warped transmission pan before, but I guess its possible. The only ones I've seen leak really bad were where people either ran over a curb or slammed the vehicle down on a rock causing a huge dent. Like others have said check for a leak coming from above the pan. Your pan may not be leaking at all.
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Unread 10-01-2009, 02:34 PM   #12
mrtosh
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Soo just to clarify since I'm doing this this weekend, only use RTV if you have a 545? No gasket?
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Unread 10-01-2009, 02:58 PM   #13
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'05 WK Limited QDII, Superlift 6", Bilstein struts,315/70/17 Duratracs, Gibson CB, Volant CAI, JBA UCA's, JKS quick disco, adj. Rear trac bar, 4xguard armor, Diablosport Intune, Xenondepot 6000k HID's, Putco Jet yellow fogs.

Last edited by mrtosh; 10-01-2009 at 03:28 PM..
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Unread 10-02-2009, 10:16 AM   #14
Ved
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Quote:
Originally Posted by five.nein View Post
Had the same problem with my 46RH. Tried everything, even a new pan. Ended up being the seal for the shift rod, appearing to be a pan leak. It was a bear to replace with the motor out. It would take a magician to replace it normally.

I second that. I replaced 3 gaskets and even bought a new pan just to find out it was the seal for the shifting rod
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Unread 11-17-2009, 09:41 PM   #15
bcumby
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So...I am having a similar issue, but the pan is all wet and I want to get a look inside so I am gonna tackle a sealand filter first just for grins.

My only concern on my 46RH is this talk of shifting rod leaking and I have found some fluid up around my oil filter, but I just had my rear main changed and the underside of my ZJ has been a wet mess since I got it, so I don;t know the origin of the fluid.

Any pics or steps for diagnosis? I have heard of a transmission actually leaking into the output area where the TC meets up and collecting fluid there too...

I am a skilled amateur mechanic, but transmissions scare me a bit. I am especially worried b/c I found it bone dry on the dipstick before I realized I had a problem.

Any advice?

Thanks,

Brandon
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