So about a week ago I hydroplaned through a decent sized puddle at about 35mph. I didn't see it or obviously would have avoided, as it was near an intersection on the right hand side of the car. I stopped at my destination and when I got back in the car 10 minutes later there was a distinct growl/grumble coming from the front right side of car when accelerating. I don't know car sounds so that's the best I can describe it. Thought a spark plug may have gotten wet so I let it be and the next day had to drive 60 miles, hoping whatever it was had dried out.

A week later, there is still a slight grumble when accelerating and I also just noticed when at 75mph in 6th gear I hit the gas and according to the computer SHIFTED DOWN to 5th then 3rd gear! Back up to 6th after 6000rpm.

I would love to believe this is a quick fix but does anyone have any ideas as to what it could be besides the transmission?

 

The noise, I cant guess.

The downshift, is normal. It's trying to help you out by downshifting to pick up speed faster. There's a chart floating around that shows when you floor it in a certain gear, what the computer will do. That is normal, not a bad thing. You want that, especially with a 250 (i have a 250 too, not hating )

 

Thanks for the response lol I guess it feels strange because I'm not necessarily flooring it, and I drive semi aggressively on a regular basis but it seems weird to have to go up to 6000+ rpm to gain 10mph? Might be psyching myself out reading about all the bad things that can happen to transmissions.

 

Just took it to the dealer and the guy said there is definitely noise. But the engine didn't hydrolock so hoping it's not too bad..

 

Any updates?