Transmission Fluid Mixing with Engine Oil
 

Looking for Idea's on the problem.

I have a 1989 K2500 Chevy 4x4 350 Auto with 260k mi. I checked my oil and it was way overfilled and then noticed my transmission fluid was very low. So, I drained the oil and refilled and topped off transmission fluid. Next day the oil was way overfilled and the tranmission fluid low again. How can my transmission fluid be leaking into my engine oil system? I am stumped and looking to see if anyone has any ideas or have heard of this problem.

Re: Transmission Fluid Mixing with Engine Oil
 

The only lines out of that transmission go to a cooler on the radiator. Not sure how it's filling the crankcase. Typically a leak in the cooler will add trans fluid to the coolant.

Re: Transmission Fluid Mixing with Engine Oil
 

There isn't (or shouldn't be) any connection between the two whatsoever. How long have you had this truck? If you just got it, it's possible that someone may have interconnected an external engine oil cooler and transmission fluid cooler somehow.

Otherwise.......someone has made a voodoo image of your truck and is putting a curse on it......?