my 3oom when reaches 40 miles per hour will not change to the next gear, what could cause that, just started today 7/25/12

my 3oom when reaches 40 miles per hour will not change to the next gear, what could cause that, just started today 7/25/12 3 Answers

My 1999 300m is not getting good gas mileage. What could be wrong. I drove around 120 miles, and I'm done to a half tank. Started out with full tank of gas. 2 Answers

99 300m. Gas mileage. Not getting good gas mileage. Drove 120 miles on a full tank. Now it's down to a half. What could be wrong?

What could cause my car to overheat if I had the water pump replace??? 2 Answers

I took a look under the hood and seen it seem to be leaking slightly from something smoke comes up from the upper left handside of the car also blows cold air if that means anything

What can be the cause of my interior lights coming on and off by themselves? 3 Answers

My interior lights come on and off by themselves while driving or just parked with engine off.

I need help setting the timing, adjusting the rocker arms and setting them they are hydraulic and I have a question about what the metal shavings could be from that where by the rockers the right head 5 Answers

Reason for work: knocking on the right side top end facing the motor. what I did: I took off the valve cover on the right side and noticed there was some big thin metal shavings by the rocker arms...