Question about 2001 Chevrolet Lumina

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Sound when over 45mph in overdrive, but not in drive

I have a 2001 Chevrolet Lumina, and last night it started having a weird problem when I was driving in Overdrive. If I got over about 40-45 mph, it would start making a strange noise, but only when I pressed on the gas. If I removed my foot from the gas, the noise stops.

the noise is like a revving sound, but not extremely loud. It also feels a bit like the car is having problems accelerating a bit. Pretty much any speed i go over 45, this sound remains.

If I drive in drive instead of overdrive the sound isn't there.

Any ideas what might be happening with my car?

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  • Leeks1152 Apr 18, 2009

    My problem is pretty much the same. Stange noise 45 mph to freeway speed only in overdrive. Also noticed that when in overdrive and there is no load on the engine it appears to go into a "free wheeling" mode and rpm goes down to idle speed. Will not do it in drive.

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You might want to have the ignition switch checked because there are three wires that run to the tranny and if it does not sent the correct voltage to the tranny (electric) then it doesn't know the RPM to shift, you may wonder how i know this? because i just had a tranny rebuilt three times over this same problem they replaced the harness from the ignition to god only knows where for 150.00 and now it is doing great.

Posted on Aug 17, 2009

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