loud humming when i'm driving, when i remove my foot from the gas it stops. on 1999 Ford Escort

after about 10 min. of driving,the loud humming starts, untill i let go of the gas, any idea?

Asked by for the 1999 Ford Escort
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2 more answers
Is the 'humming' directly related to whether or not you are stepping on the gas? Is the A/C on or off at the time the noise is occurring? What speed does the noise start/stop at? does putting it in a lower gear have any effect? Answers will help in ruling out certain possibilities.
Would need more details, but sounds like a bad wheel bearing or a bearing going in the transmission. I would recommend you have it professionally diagnosed.