Rear drum brakes, that lock up during heartbreaking quicker than the front brakes, can be adjusted. The rear brake pads need to be backed off.
The technique of braking short of lockup is known as threshold braking. Modern cars have anti lock brakes to help prevent from going into full brake lockup.
by increasing the friction ABS brakes have the same friction as standard brakes, the way they work is to release the brake force to a wheel that stops turning preventing lock up and loss of steering control.
If drum brakes you probably have a bad wheel cylinder on the side that is locking up.
get a new car
The wire that typically goes from the Engine Control Module (ECM) to the brake switch to disengage the converter lockup is often referred to as the "lockup release" or "converter unlock" wire. In many systems, this is usually a signal wire that connects to the brake light switch, allowing the ECM to receive a signal when the brakes are applied. This action prompts the ECM to disengage the torque converter lockup to facilitate smoother braking. However, the specific wire color and location can vary by vehicle make and model, so consulting a wiring diagram for the specific vehicle is recommended.
Check the emergency brakes
Defective master cylinder? Frozen caliper? Parking brake cable frozen?
Ether your low on brake fluid, or you have the wrong kind in it.
Check your ABS system... How Anti-Lock Brakes Work Copy & Paste link http://auto.howstuffworks.com/anti-lock-brake.htm
brake calibers might need replacing,the pistons might be getting stuck,its easy to replace.
Anti lock brakes are self controlling, pumping the pedal or older methods of reducing skid can reduce the ability of the abs to come to the quickest stop possible without lockup. Typically you apply the brake as needed and a correctly functioning ABS system will stop as quickly as possible without wheel lockup. Using other good driving judgment / skills are in order for hydroplane, spinning out, etc. Additionally some vehicle incorporate traction, body, suspension and ABS control - that monitor and adjust each system instantly to provide stability, traction, braking, handling, height and other features to provide quality ride, handling and control on various surfaces and conditions,
Lockup - 2005 Life After Lockup 10-3 was released on: USA: 26 February 2011