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I have a 98 Ponitac Grand Prix GT. Soon as you start going it starts roaring. Gets loader the faster you go till 70 mph. When I am turning to the right a little while going 60 mph the sounds quiets down. Only to the right. I have replaced both wheel bearings, got brand new tires, new brakes. Didnt stop the roaring. Would it be cv axles, rack & pinion, transmission, etc?
That description indicates wheel bearings, replace all 4 in the front end of your cougar.
I suspect that the right front bearings have failed in the STATIONARY race, at the top of the bearing.
first i would check the tires , are they cupped or chopped on the tread? run your hand over the tread and see if it feels rough and uneven. take the truck to a auto repair shop and have them jack both front and rear axles off the ground, put the truck in 2 wheel drive and run the speedometer to the speed you usually hear the roaring noise, if you don't hear the noise , put the truck in 4 wheel drive, turn off the traction assist if it has one and run it to the speed you would hear the noise. if you hear the roaring noise with tires off the ground, the problem is in the drivetrain, (engine, transmission, transfer case, u-joints, differentials or the front left or right cv halfshafts or u-joints). the older models (97 98) had the front two driveshafts from the differential turning all the time, they engaged in 4 wheel drive from the transfer case and a solenoid on the front differential. depending on the miles you have on this truck, the most likely areas i would look at would be the tires, u-joints/cv joints, and front and rear wheel bearings. thanks and good luck.
hi, this sounds like track rod ends have gone this is for the steering and causes the tyre to where in one point these are cheap to buy and easy to fit but you will need to get the tracking set after replacing this part as it needs to be set to stop your tire wearing uneven the noise your getting will be from the tire on the road as it will be forcing the tire to run uneven so getting this checked would be my first choice. Hope this is some help toy you let me know how you get on or if you have any questions ok
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