back struts are bad or exhaust is loose
Transmission mount
bad coil springs
A knocking noise when coasting in a vehicle could be caused by issues with the engine, transmission, suspension, or brakes. It is important to have a mechanic inspect the vehicle to determine the exact cause of the noise.
If the 1999 Suburban noise is a sort of loud banging noise, the problem could be that the engine have jumped time. Jumping time would cause the noise and jerking in the engine.
The most probable cause is poor fuel or water in your fuel. This could also be due to the timing being out of proper adjustment.
There could be many reasons. Not much info to go on. Have a trusted mechanic inspect the vehicle now before you get hurt or hurt others.
its amazing
have it checked you could have bent the axle and the noise would be the bearing
The banging noise from your furnace could be caused by a variety of issues, such as a dirty burner, loose ductwork, or a malfunctioning blower motor. It is recommended to have a professional HVAC technician inspect and diagnose the problem to ensure safe and efficient operation of your furnace.
have you checked your car for aliens?
It can.
Could well be worn bushes in the suspension arm ( It was in my old civic )