If you have positively identified it as engine oil, it could be the rear main crank seal. Repair would require transmission and flex plate removal. Clean the area thoroughly and see if it is leaking at the transmission-engine mount area.

 

Like was said before, check the rear of the engine, at the transmission to see if it is the rear main seal. Also check to see if it is leaking out of the front cover anywhere. It can leak there and blow everywhere under the truck. Check around the valve cover as well.

 

Because you have a 4 x 4 the transfer case tail shaft bushing may have worn to the point where fluid is getting past to the seal and leaking by. Just because transfer case fluid isn't gear oil or motor oil doesn't mean it won't look like oil or be red as is most transmission fluid.

 

I have a question maybe this will help me out although I’m pretty sure it’s the transmission but I do know I had a cv axel going bad. So 2004 Nissan Maxima automatic. Just stopped driving randomly never really had any signs of the tranny going bad, but what ever happened I can’t put the car in park like I can put the shifter to park but the car won’t actually stop like if it’s in park. When this happened I was going up hill not not a crazy up hill road just happpen to be curving up due to ramp.



Kodi nox

 

I have a question maybe this will help me out although I’m pretty sure it’s the transmission but I do know I had a cv axel going bad. So 2004 Nissan Maxima automatic. Just stopped driving randomly never really had any signs of the tranny going bad, but what ever happened I can’t put the car in park like I can put the shifter to park but the car won’t actually stop like if it’s in park. When this happened I was going up hill not not a crazy up hill road just happpen to be curving up due to ramp.

Just curious. This is a Forum dedicated the Chevy trucks. Wouldn't you get more valid suggestions from a source such as this: 6th Generation Maxima (2004-2008) - Maxima Forums