Sounds like dry wheel bearings. When they sound like a giant gritting his teeth they're done for.
There are no emergency brakes on the front wheels of vehicles.
Rear brakes do not have to be replaced too often. It's really hard to tell without looking at it. What you can do is to replace front brakes and test drive it, if you feel that your car brakes works just fine you do not need to replace rear brake shoes.
Most older Camrys have front disc brakes and rear drum brakes. Each front wheel has a pair of brake pads that eventually wear out and have to be replaced; do not replace pads on only one wheel -- replace the pads on both wheels. Each rear wheel has a pair of brake 'shoes' that eventually wear out and have to be replaced; do not replace 'shoes' on only one wheel -- replace the 'shoes' on both wheels.
brakes on all 4 wheels
All modern mass-produced cars and light trucks DO have hydraulic brakes on the front and the rear wheels. Heavy trucks generally have air brakes on all the wheels. Maybe you are thinking of cars that have disk brakes on the front and drum brakes on the rear? On cars, these are both hydraulically operated using the same hydraulic (brake) fluid. In normal stopping situations, the front brakes do more work than the rear brakes. Maybe 70 or 80% of the braking is done by the front wheels (it depends on where the weight is in the car and how fast you stop). Disk brakes are a somewhat better brake for a car, but drum brakes are a little cheaper to manufacture. So, disk brakes are almost always used on the front wheels where the braking is more important. Drum brakes are used on the back of some cars to save money. Note that performance cars (sports cars) almost always have disk brakes on all of the wheels.
back wheels.
Your rotors are warped, replace them.
Primary brakes are situated at the front wheels and provide about 70% of a vehicle's braking power. Your secondary brakes are located at the rear wheels and only provide about 30% of a vehicle's braking power.
You still have air in the back brake lines or they are not adjusted properly which is making the front brakes take the full load
Metering valves are used in the automotive industry, it is a necessary part on autos that have disc brakes on the front wheels and drum brakes on the rear wheels.
The three types of brakes are Pedal, Hand and Chin brakes. 1 Drum brakes on all four wheels 2 Disc brakes on front, drums on rear 3 Disc brakes on all four wheels.
The 1995 wheels will not clear the brakes if you put them on the front of a 2002.