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Transmission pan gasket. RTV too?

17K views 31 replies 15 participants last post by  kg6mov  
#1 ·
Hey guys so my wife bought a Wrangler with a 30RH. I'm ready to put the transmission pan back on after changing the filter and I'm not sure, do I use RTV with the gasket or do I put the gasket on dry?

The little paper that came with the gasket from AutoZone says to put a light coat of grease on each side of the gasket and no RTV. I've never done this before but will be doing it on my ZJ soon so I guess it doesn't hurt to ask here.
 
#5 ·
The paper one is gonna leak no matter what you do. Once you get annoyed with the leaks get a mopar reusable gasket and it won't leak.
 
#7 ·
I used the RIGHT THE STUFF rtv... its expensive $12-13 for the small can.. but its worth it.. it works for everything.. i love it.. dries quick.. can be used right away.. and like any silicone it seals better then any paper gasket.

Its works great because if you have pitting on a water pump or timing cover or whatever itll seal it, where a felpro paper gasket wont, and with a trans pan they can be bent slightly from overtorqing and a paper or quark gasket wotn seal 100%.

ONLY issue with the right stuff or any silicone is its a little harder to clean up if you take it off.. Although it is easier to clean then paper gaskets.. which can litterally burn or melt onto the surface and that makes them so damn hard to get off
 
#8 ·
If you're talking about a thin rubber gasket which is an Autozone house brand it's probably a good thing you used some gasket sealer on it because the gasket's aren't very good.

I recently bought the Mopar re-usable gasket off Amazon for the next time I change out the fluid on my 96 4.0 42RE.

Here's some interesting info. While the 545RFE trans in my 04 WJ is a completely different animal than the ZJ transmissions the way the pan attaches is not. I went to buy a trans pan gasket at the dealer and they said they'd have to order one. Thought it was a little strange this common gasket used on the 45RFE/545RFE wasn't in stock?

In talking to the dealer service mechanics they said they use no gasket at all on these WJ transmissions since it's just extra surfaces to leak. They just use Mopar RTV alone for sealing the pan directly to the case. That's what I ended up doing and no leaks going on for 2-3 years w/o a pan gasket using Mopar RTV.

Guess whether a pan gasket is used or not also depends if you're going to off-road through water. I don't use gaskets anymore on the axle differential covers on my Jeeps after coming to this forum. But if going through high-water a re-usable gasket on the trans/differential covers may be in order if you change the fluid often and don't want to mess with RTV clean-up. Just my take....
 
#11 ·
I did indeed use the AutoZone house brand that has a thin rubber gasket with it. I put a layer of high tack gasket sealant on each side and torqued it down with my inch pound torque wrench. Hopefully it doesn't leak. I'm glad I posted this because when I do my ZJ here soon, it sounds like the Mopar reusable gasket is better by far. If this AutoZone gasket does turn out to leak I'll get a Mopar one for it as well.
 
#12 ·
Yeah, this is the mopar one:
Image


It's got the rubber seal lines on both sides of the hard plastic, seals very well, and looks like new when you pull it.
 
#16 ·
If, and when, you go to get the Mopar reusable gasket, you should have the part number handy. When I went to buy one, the first parts-counter guy looked at me like I was crazy, said it didn't exist. Fortunately, counter-guy two, probably the manager, interceded and gave him the part number while he grabbed it off the shelf. He went right to it. The part number is: 4295875AC (Mine's a '98, which shouldn't matter, but...). Good luck.
 
#17 ·
#29 ·
Tonight I just got through replacing the Autozone gasket and filter I put on there about 8k miles ago with OEM. The Autozone gasket always left drops when it was parked. The longer it was parked, the drops would accumulate into a small puddle that I would periodically wipe up off my garage floor. I went with the Mopar gasket, mopar filter, and installed a new 3-4 accumulator spring. Torqued the pan bolts to 13 ft lbs (hand tight, then criss cross torque), and no leaks yet, but it is too early to tell. My pan looked pretty good on the mating surface. I'll report back in a few weeks.
 
#30 ·
Those of you with the MOPAR gasket, did you have to check the flatness of the pan flange? Mine was pretty warped when I got it and I flattened it back out with a hammer and dolly but it might still have some irregular bits. I have the thick rubber and fiber Fel-Pro gasket there now and it never drips but the pan is damp. I already have the MOPAR gasket but I'm debating buying a new pan. Maybe a chance to upgrade to the deeper Dakota (?) pan.
 
#31 ·
I bought the WJ pan when I did mine.Its a bit deeper but if you use the plastic filter wirh it no adapter is needed. Used the mopar gasket. Had a bung welded in it to make it easier to drain.
 
#32 ·
I would certainly replace any pan that needed a hammer taken to it.

I didn't even try to reuse mine, it was pretty bad. Went cast aluminum to prevent future warping if it got dinged on the trail.