Just had my truck on the lift at local garage and they told me my tranny case was "rotted and seeping". When I crawled underneath to have a look for myself I saw most of the entire pan "wet looking" and and I was able to flake off in a few areas what appeared to be be very thin surface rust. The pan seamed solid throughout as I tapped it all around, but again was damp almost like it was sweating. My truck is a 2003 with 98K miles on it. Are these stock pans known to fail and does it sound like this pan is shot? They quoted me about $100 in parts for OEM, but I see for about $40 more I can purchase a cast aluminum deep pan from B&M. Have any of you guys seen this happen? Any thoughts on this or comments on the B & M aftermarket would be greatly appreciated. Thanks!

 

I've never seen a tranny pan rust through. I have seen oil pans rust though. So I guess I wouldn't count anything out.

I would clean the pan spotless with brake cleaner or something. Flake off any rusted areas that you might think would cause a leak. And just keep an eye on it for a day or two of driving. You'll see where it's comming from. It could be something as simple as a couple loose bolts or the gasket could be ripped/smooshed.

It would also be wise to pull off the inspection plate to verify that no fluid is seeping from the torque converter seal.