![]() ![]() Either way, fluid can start to leak out of the pan. As you drive, rocks can fly up and hit the pan, leaving cracks and damage behind.Īdditionally, the transmission pan can rust over time. It can hold up to a lot of abuse, considering it is located underneath the car. The transmission plan is another component that’s normally durable. For this reason, it’s important to take your vehicle to a qualified mechanic that understands how tight to secure the plug. ![]() The plug also fails if it has been over-tightened or gets stripped. Over time, this plug can also fail, allowing fluid to seep through. Then, the plug is put back in before you refill the system with fresh transmission fluid. The plug is pulled out to drain the old fluid. ![]() It’s removed when performing a transmission fluid change or flush. The transmission pan also contains a drain plug on most car models. However, the leak can get bad quickly, without warning. If the gasket is mildly worn, the fluid may leak out in tiny bits, often known as seepage. Over time, this gasket can deteriorate, especially when it’s exposed to a lot of heat. Transmission Pan GasketĪt the pan, there’s a gasket that keeps the fluid from leaking out. Only a visual inspection will determine where it’s coming from. However, it can also come from a cracked or rusty transmission pan, hardened seals, damaged cooling lines or a failing torque converter. ![]() Most often, the fluid is leaking from the transmission pan gasket or the drain plug. This Jeep is completely stock except for 30” tires.Conclusion Common Causes of Transmission Fluid Leaks All the wetness is on the bottom from the tranny mount back. The tranny mount is wet with fluid but everything is dry in front of the mount. Each time I can look above the skid plate and see a drip right at the location where the tranny and tc mount together. I drove it a couple of miles and yes I still have the leak. So I purchased one and installed it yesterday. So I read some forums on here about the extended seal. Drove the Jeep a couple miles and still have the leak. I did some research and heard that national seal is a better seal. Again drove it a couple miles and the tranny is still leaking. So I purchased another autozone tranny seal and put it on. I drove it a couple miles and still had the same leak. I replaced the seals with autozone seals. The leak appeared to come from where the tranny and TC bolt together. I noticed tranny fluid on my garage floor. I recently purchased this Jeep for my wife. I have a 1999 TJ 4.0 32RH/231 I have replaced the transmission output shaft seal 4 times in the last 6 weeks and replaced the TC seal once. I got it out of confusion after visiting. In the below pic you will notice there is an additional seal 710928. Others are probably fine, but I would hate to replace a faulty new seal. Again, I choose National.Īdvance Auto Parts sells National. Because of this, the same sleeve is used. The tcase input shaft rides on both the tranny and tcase seals. Just in case I needed a speedi-sleeve (repair sleeve) I picked up a couple. 4269 956 becomes 710058 - Transmission adapter seal.4167 929 becomes 3173 - Transfer case input gear seal.I then stumbled across this web site: Timken Online Parts Catalog It will cross reference the Mopar part numbers to Timken/National part numbers. 4167 929 - Transfer case input gear seal.I'm sure the dealership does, since it's their part numbers, but there's many reasons why I don't want to use them. Apparently, cross referencing or even offering a suggestion where to go is out of their grasp. Advance Auto Parts and others have no idea what to do with these part numbers. I started with the Jeep parts catalog for my model. I guess I'll replace both seals!įinding the right part numbers for the seals wasn't as straight forward as expected. It's hard to tell if the tranny or tcase is leaking since they use the same fluid. ![]()
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