Thread: Bearing Type sound at 5-10 mph, misfire type feeling 40-50mph turning right

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  1. #1 Bearing Type sound at 5-10 mph, misfire type feeling 40-50mph turning right 
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    This is a great forum, i've found lots of great information for my newly acquired GTP with 168,000 miles. Thanks ahead of time for your help.

    The concern that i have is driving me crazy...when i first got the car, it had horrible grinding noise from the front end, especially when turning right. I thought by just replacing the left front bearing, it would solve my problem. I replaced left and right hand front wheel bearings because it needed them. Noise was almost gone, but still not quite.
    While replacing them, i noticed the front brakes were very low(almost metal to metal on RF inner pad). Replacement of front and rear brake pads with discs were done a week later.
    Soon after, when accelerating lightly, it would feel as if I had a misfire. I proceeded to replace spark plugs, sure enough...spark plug wires separated on #5 spark plug. I held off replacing right hand bank plugs until wires arrived a week later. I just replaced spark plug wires and plugs on 2,4 and 6 cylinder last week.
    This is where it gets good...finally, thinking I was gonna have a smooth ride, I take it out for a spin and notice when making a right hand turn, at slow speeds~5mph, a rotational type sound coming from left hand side(kind of like a scraping type sound).
    I thought i had left something loose. i didn't drive the car for a couple of days, finally yesterday removed front wheels to re-inspect my work. Everything is torqued to proper specs.
    Once again, I hit the road.
    Some of my observations...
    When driving in residential zone, traveling 25-30 mph, if i go over an imperfection in road like a dip where only left hand suspension drops(right hand is stable), it sounds like a clunk which I can also feel in the floorboard. Once i hit 40-50 mph, it almost feels as if i still have a misfire, yet i believe it's my drivetrain that is "bouncing around", reason i say this is because it is most noticeable when the road is curving to the right and once again i'm able to feel it on floorboard. If I happen to let go of accelerator while experiencing "misfire", I hear a faint hum from under center.
    Lurking around this site I see that differential problems are not out of the ordinary, especially with this high mileage. My trans fluid is very dirty, fluid change was next on the agenda. I think I've got something going on with my differential where my left hand axle is bouncing around a little more than it was designed to.
    I hope to get some feedback on what i've described.
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  2. #2 Re: Bearing Type sound at 5-10 mph, misfire type feeling 40-50mph turning right 
    GTX Level Member QUICKSILVER462's Avatar
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    Check your front sway bar, the factory unit is know for cracking at the "eye" where the end link attaches, also inspect the endlinks and bushings to make sure they are in good shape.
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