Knock when I hit the gas or break

Asked by Feb 12, 2015 at 02:40 PM about the 2005 Acura TSX 6-spd

Question type: Maintenance & Repair

I've noticed at low speeds when I hit the gas from a stop or brake to stop, there is a
knocking clunking noise and I can somewhat feel it in the floor area. I do not notice it
when it's very cold however, typically above freezing. I took it to a mechanic and they
replaced an axle for $300 but it hasn't gone away. Any tips?

1 Answer

38,285

First thing, change mechanics....sounds like you have a bad motor mount or transmission mount. Every time you punch the gas, your engine and tranny want to twist. A bad or cracked mount will cause a noise like that to occur. Have someone with some mechanical experience slide under your car and take a look before letting a shop look at it. I never trust any of those guys. If possible, put the car on 4 jack stands. Put the car in gear and punch the gas. See if you and a couple of buddies can replicate the sound. Have one guy look under the car while you hit the brakes and hit the gas. If you can't replicate the problem, I would start looking at the suspension. You may have a collapsed strut, or a broken coil spring. Post back with findings......

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