i thought the same thing, so I took it to a tranny shop. They even checked it with a machinist square all was correct. Tranny shop ended up sealing the pan also. The logic behind this question is simple. I am goin to do a fluid and filter change and wanted to know which sealant would work. Guess I opened a can of worms.

 

Get the Mopar gasket IMO.

 

i had what appeared to be a gasket leak.
it turned out to be the neutral safety switch just above the pan. i think i used a 1-1/16 oil pressure socket to tighten it. or maybe channel locks?? there's a few other seals including linkage that could fool you.

if it keeps leaking spray/wipe it off with brake cleaner and follow the wet spot.

 

I've never had a rubber one leak with no sealant. Although I keep mine serviced at 30k. I think the problem is getting the pan scarred up when scraping off the rotted mopar one.

 

+1 - what I'm hearing about this situation makes no sense. If the pan and trans mating surfaces are flat, there should be no leak, as the gaskets mentioned are thick enough to fill the gaps, along with minor imperfections. Sounds like the leak may be at the neutral safety switch, the selector shaft seal, the transmission filler tube seal and/or the front pump seal behind the converter.

 

there is some confusion here. Currently I have no leaks, but am getting ready to do a tranny fluid/filter and always notice the tranny shop, after my futile attempts, ends up fixing the pan leak utilizing sealant.

 

OK, let's gain some clarity - are you stating that when you took your vehicle in to get a trans fluid change, you got it back with a leaky transmission pan and you then returned the vehicle to them and they fixed the leaky transmission pan by using sealer on the trans pan gasket?

Also, as a follow-on question, is the place changing the fluid by dropping the trans pan and draining it or sucking the fluid out via the dipstick tube?

 

i attempt, without sealant, to torque the pan to stop it from leaking after doing the items in the aforementioned post and I end up taking to the trans shop to repair the leaking gasket.

 

I've got a rubber gasket on mine and haven't noticed any leaks yet.


Minus the leak in my cooler line.

 

so i show up at a different local tranny shop that I have recently befriended and had them install a slip in band and band anchor including a rubber gasket on the pan - thay said they do not use rubber gaskets and used a cork gasket w/ no sealant - it went back yesterday to repair the leaky pan. I bet I will be headed back again.