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Today while towing a 10ft trailer with a golf cart my truck seemed kind of under powered.It has the 5.0 with 3.73 rear end.When I got to where I was going I looked under my truck and there were spots all over the rear end and axle and frame that looked like oil or transmission fluid.I cant find any noticable leaks.Any body else ever had this happen?The air temp today was 100 and the transmission gauge stayed around 200.Thanks for any comments.
I crawled under the truck from front to back and cant find anything leaking.Does the transmission have some kind of relief valve if it gets hot.I wouldnt think 206 degrees is way to hot.The front side of the rear differential is covered with what looks like oil spots.
I've never looked at my axle but in general there are only a few seals on the axle. Back cover, front pinion seal, axles ends, sensors, and the vent tube. In order to get oil stains on front of axle housing then I'd guess the front pinion seal has leaked. Take it in for warranty claim. Could be bigger problems leading to that seal failure.