It could be one of the following: 1. Tires are out of balance, 2. Perhaps one or both tires may wobble. 3. Brake rotors may have warped.
Clunking/knocking sound felt though steering wheel and floor when turning and going over bumps at low speeds.
Yes, a clogged converter will rob you of power and speed.
Sounds like a wheel bearing going bad. Had similar issue on ford explorer that ended up being front left hub bearing. If it is a front wheel drive vehicle, it could be a CV joint on drive shaft to the side of the noise.
when your going fast you hit harder which causes more damage, but when your going slow you hit slower than you hit fast which cause less damage.
where is it shaking in the steering wheel or in the seat? shaking at certain speeds can be caused by a busted belt in a tire
Loose/worn steering components. Especially the steering stabilizer shock and the trac bar.
More than likely tire issues. As simple as tire balance if not possibly a tire going south on you. Tell me more. Does it do it just at 40 or at higher or lower speeds as well, and where do you feel it, steering wheel, seat....and can you do anything to make it more pronounced?
Mine (2002) does it when the traction control comes on when I hit a bump hard, etc. Also could be wheel bearing going bad.
out of balance
Any bushing, if its worn or old enough, causes suspension squeaking at low speeds and when going over bumps. The typical cause of squeaking noises when turning the steering wheel is low power steering fluid. The power steering fluid reservoir should be checked and the fluid topped off if it is low. Fill your reservoir with manufacturer-specified fluid (or have your oil-change service station do it). With a very low fluid level, the whining sound will be accompanied by a difficulty in turning the wheel.
Perhaps low power steering fluid Perhaps power steering pump is going bad Perhaps low power steering fluid Perhaps power steering pump is going bad
If you have plenty of fluid it could be the power steering pump itself going bad or it could be the rack and pinion assembly.