The calipers may be failing. Just age and heat related. I have carried newspapers by night (a heavy load) and suffered similar problems. With wear the piston within the brake caliper will bind up and not allow hydraulic pressure to back off of the shoes against the rotor. The shoes will grip the rotor causing further heat buildup and warping of the rotor. It is the warped rotor that will cause the front brake chatter. Often a rebuilt caliper is cheaper than a rotor and a set of brake pads. You may have a caliper that is allowing the brake pad to rub, or the vehicle may be a little heavy for brake design. If the problem went away after you turned the rotors, that's a good indication that the rotors were warped causing your brake chatter. If the vehicle is loaded heavy or the brakes work hard for any reason, the rotors will heat up and warp, causing brake chatter. That's just the nature of disk brakes. You may be able to get better service from some NEW rotors, and if you're buying them from an auto parts store, make sure they aren't oriental iron. Often cheaper iron will warp easily. You may need to pay more for dealer rotors, but if you keep having the problem, that may be your only solution. I've used imported rotors for my vehicles and the vehicles I've repaired for others and haven't had a problem, but it can be a problem for some people.
You need an alignment.
You may need a wheel alignment, or you may need bushings.
It's either bad alignment or maybe a bad wheel
there could be several reasons for this problem the most likely being an alignment problem, if it occurs only when your braking it is probably warped rotors or out of round drums depending on your braking system bad spark plugs or wires
Tires worn out? Tires mounted and tight ok? Good alignment? Good balance? you'll need to take it back and ask these things or get a second opinion.. d
It might have a caliper sticking, or worn brake pads. This can also be caused by bad ball joints. If that doesn't help, you may need an alignment. Check to see if it pulls when driving also. It won't pull as hard as when you stop, but if it does the alignment is off. Low tire pressure on the suspect side can cause the car to pull under braking. Possible contamination.
Mine doesn't but in your case I would check: what speeds, only when braking, tire inflation, brake pads, front end alignment, etc.
Braking is used to bring the motor to stop quickly or instantly. Braking can be two way broadly. One is mechanical braking. Other method is electrical braking. One of the electrical braking is dynamic braking.
Mainly 2 types of braking are used: rheostatic braking and regenerative braking
This could be the cause if an improper alignment if it happens under normal straight line driving. If the jerk is more prevalent when going on bumpy roads, it may be a sign of bad shocks or springs. If the jerk is occurring during braking situations, the problem may be related to the bearings being worn or warped discs/drums in the braking system.
Antiliock braking system is the mechanism which controlls the braking of brakes, If the pedals are fully pressed it will oppose the motion to protect your braking
This could be the cause if an improper alignment if it happens under normal straight line driving. If the jerk is more prevalent when going on bumpy roads, it may be a sign of bad shocks or springs. If the jerk is occurring during braking situations, the problem may be related to the bearings being worn or warped discs/drums in the braking system.