After I've passed 70mph car starts shaking on drivers front tire, new tires & balanced. also feel the gas pedal shake wen i let go of the gas to make the speed reduce to stop the shaking.
Hey,, The problem may not be relate to the wheels at all. Fro what your telling me it sounds like a broken engine mount. This will cause the problem. Basically the engine mount hols the engine to the vehicle and the rubber in it dampens the vibrations. With the rubber broken you will feel the vibrations on the pedal..
However to mention the can be another reason, This one is very unlikely here seeing as the pedal vibrates but just in case check your Alignment and Cambering.
basically take the vehicle to a mechanic to locate and replace the engine mount , ore than likely is the rear mount or the one closest to the driver. You can do this yourself if you like,
1.) Locate the broken Mount (you will see the rubber in the mount broken)
2.) Use a Car jack (the ones you use the change tires) , and use it to lift the engine up to reduce the pressure on the mount.
3.) remove the broken mount and replace it.
Its just 4 bolts, 2 on the engine 2 on the mount to the car body. You will need to get a torque wrench and a lever (cast iron metal pipe will work fine) to add extra leverage to turn the bolts off.
SOURCE: It doesnt shake until about 55mph. then it shakes
I had a bent rim as well as tires out of balance.
SOURCE: Shaking at highway speeds.
As for your shaking at highway speeds, providing your tires have been balanced properly, it's probably a u-joint. If you let off the gas when it's vibrating, and the vibration quits immediatly, it's a u-joint. If it doesn't, it's a tire or wheel.
The squeak is probably a shock, but that would be a guess.
SOURCE: problem with shaking tires
replace the idler arm that connects the steering linkage to the frame on the passengers side,heavy duty part is about$90.00
SOURCE: 2005 Equinox steering wheel shakes when applying
have the rotors machined, shaking when braking is an indication of a warped rotor or drum, even though it may look ok, the rotor can still be warped, it would be a good idea to have the rotors/drums machined and new pads installed if the old ones are 4-5/32'nds or lower. that should take care of your shaking when braking issue
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