Just got into an 07super with 20000mi. Spotless truck "BUT" i found a small amount of oil dripping from the lower oil pan.

Ques.- Are these trucks known for connection problems (ie. leaks) where the upper and lower oil pans meet?

 

my 05 didn't? check the gaskets etc. could just be as simple as a new gasket is all, my 05 had almost 100,000 when i let it go, never had one leak...

 

Think i found the problem!!!!

Front of the trans. where it bolts up to the flywheel, there is a rubber grommet. It appears this grommet is to serve as an inspection hole? Oil seems to be coming from this area so would that tell me that I have a rear main leak possibly?

 

honestly i don't know on that one man, i wouldnt think it would leak but hell who knows

 

It could be a rear main or a bed plate. Is it just a once in a while drip or does it mark its territory every night?

 

coming from gromet in lower portion of bell housing? trans input seal???

 

I would call it my bell housing.. Definatly not the bed plate.. Never had this gromet on any other truck i've had in the past.

Tranny bolts up to fly wheel and at the bottom of the "tranny plate" is where the gromet is. Directly behind the lower oil pan. Gromet is approx. 3" wide and 2"tall.

The drip is very very slow. only is present after i run the truck. doesn't leave a footprint anywhere but forms a drip at bottom of trans that looks like it could fall at any time but doesn't.

Where it's located tells me i have a rear main leak but it's not totally obvious like it wouldv'e been with my other trucks.
Going on a three hour run today so i will see if it gets heavier with a longer run and report back..

 

My truck had a drip hanging from the bell housing its entire life. I never saw a spot on the ground so I didn't worry about it.

 

It could be a rear main seal, that is leaking. With the engine running, remove the oil fill cap. If you see a cloud of oil vapor exiting and can feel air comming out from a few inches away you probably have "blow-by". That's a condition caused by high pressure gasses leaking past the piston rings when the engine is running. When that occurs it usually destroys the rear main seals and there just isn't much that can be done short of a replacment engine. Rear main seals can also go bad for other reasons.

Also, intake gasket end seal leaks can leak oil in the same way with the same diagnosis- rear main seal-NOT. Start repairing oil leaks from the top of the engine down. Gravity complicates things sometimes. Things are not always as they appear.

 

Ok i got one for all of you. My 04 has a leak that looks to be comming from rear passenger side of the motor. The funny thing is when i start the truck and drive it for a few mins and shut it off it leaks about 1/4 to 1/2 a quart in about a 10 min period but if i start it and drive it for about 20 or 30 mins it only leaks about 5 to 10 little drops and thats it. What do you got for that?