How do i replace the front wheel brake discs on my 1995 discovery 300

Did you recently replace the front brakes ? If you did them yourself, did you clean and GREASE the front rotor pins that bolt the brake disc holders to the wheel assembly ?They might be rusted in place, and won't let the disc retract or close. Your wheel cylinders might be frozen in place as well.

Brake discs with pads need to be changed both sides on the same axle. Slacken the lug nuts and then lift the corner of the car and remove the wheel. Put a screwdriver tip between the brake pad and the disc and twist until a couple of millimeters of gap has opened up, do this front and back of the disc. Now remove the two large caliper securing bolts and lift the caliper up. locate the caliper body so that its weight does not pull on the rubber brake hose ( piece of wire to hold it temporarily to the strut spring is good). The disc is located by a couple of small screws. Remove these and the disc will come off the wheel studs. Fit the new disc and reinstate by reversing the steps above. Note if you have pushed the pads back far enough when removing the calipers then the caliper should refit easily over the unworn and therefore fatter new disc even with new pads fitted. put a small dab of anti-seaze grease (CopperEaze or similar) on the back of each pad as this will prevent squeal. Tighten the caliper bolts thoroughly when reassembling. Remember to pump the brake peddle back to pressure to re-seat the new pads to discs before test driving. Now do the same to the other side. If you are new to this the fist wheel is a voyage of discovery and the second wheel will take a quarter of the time.

The reason you're getting mixed info from parts stores is because it comes both ways.
Look at the following to determine which one you have, 4 wheel disc brakes (floating front rotors) or rear drum brake model (except 4 wheel disc brakes):
Brake Disc (Rotor) REMOVAL & INSTALLATION Except F-Super Duty with 4-Wheel Disc Brakes Fig. 1: Secure the caliper so there is no tension on the brake hose

1. Jack up the front of the truck and support it with jackstands. Remove the front wheel.
2. Remove the caliper assembly and support it on the frame with a piece of wire (or something equally secure) without disconnecting the brake fluid hose.
3. Remove the hub and rotor assembly.
4. Install the rotor in the reverse order of removal, and adjust the wheel bearing as outlined in Section 1.

F-Super Duty with 4-Wheel Disc Brakes The hub and rotor are individual pieces, allowing the rotor to be replaced independently. The front and rear rotors are the same and are attached with 10 bolts and washers. The bolts are tightened a little at a time, in a crisscross fashion, to an ultimate torque of 74–89 ft. lbs. (100–121 Nm).

Caliper Removal

1. CAUTION: Do not use heat to loosen a seized lug nut . Heat can damage the wheel and the wheel bearings.
   Loosen the lug nuts.
   1. Remove the center cap.
1. With the weight of the vehicle on the wheels, loosen the lug nuts.
1. WARNING: THE ELECTRICAL POWER TO THE AIR SUSPENSION SYSTEM MUST BE SHUT OFF PRIOR TO HOISTING, JACKING OR TOWING AN AIR SUSPENSION VEHICLE. THIS CAN BE ACCOMPLISHED BY TURNING OFF THE AIR SUSPENSION SWITCH LOCATED IN THE RH KICK PANEL AREA. FAILURE TO DO SO MAY RESULT IN UNEXPECTED INFLATION OR DEFLATION OF THE AIR SPRINGS WHICH MAY RESULT IN SHIFTING OF THE VEHICLE DURING THESE OPERATIONS.
   Raise and support the vehicle.
1. Remove the wheel and tire assembly.
   1. Remove the lug nuts.
   1. Remove the wheel and tire assembly.
2. CAUTION: Replace the lining if worn to or past specifications. Replace the brake shoes and linings in complete axle sets. Inspect the brake shoes and linings for wear or contamination.
3. WARNING: BRAKE FLUID CONTAINS POLYGLYCOL ETHERS AND POLYGLYCOLS. AVOID CONTACT WITH EYES. WASH HANDS THOROUGHLY AFTER HANDLING. IF BRAKE FLUID CONTACTS EYES, FLUSH EYES WITH RUNNING WATER FOR 15 MINUTES. GET MEDICAL ATTENTION IF IRRITATION PERSISTS. IF TAKEN INTERNALLY, DRINK WATER AND INDUCE VOMITING. GET MEDICAL ATTENTION IMMEDIATELY.
   Disconnect the front brake hose (2078).
   1. Remove the front brake hose bolt.
   1. Remove the copper washers. Plug the front brake hose.
1. Disconnect the front brake hose
4. Remove the disc brake caliper (2B120).
   1. Remove the two caliper bolts.
   1. Lift the front disc brake caliper (2B121) off the front disc brake caliper anchor plate.
5. On 4x2 vehicles, measure the front disc brake hub and rotor (1102) thickness.
   • Replace the front disc brake hub and rotor if not within specifications 27.7mm Min.
6. On 4x4 vehicles, measure the front disc brake rotor thickness.
   • Replace thhe front disc brake rotor if not within specifications. 27.7mm Min.
7. Inspect the disc brake caliper for leaks.
   • If leaks are found, disassembly is required

Sounds like a wheel bearing.

you have warped frt disc rotors replace them and the brake pads!

Your car has front disc brakes, the disc's are running out of true, as u apply the brake this causes the steering wheel to shake, the higher the speed the more u feel this, the solution is to have the front brake disc's machined true again on a brake lathe or if they are to thin replace them.

here is procedure

Section 04-01: Suspension and Wheel Hubs, Front 1996 Taurus, Sable Workshop Manual
REMOVAL AND INSTALLATION Wheel Hub Bolt Removal

1. Raise vehicle on hoist.
   

1. Remove wheel and tire assembly. Refer to Section 04-04 .
   

1. Remove disc brake caliper (2B120), and front disc brake rotor (1125). Refer to Section 06-03 .
   

Brake Shoe and Lining Removal

1. Remove brake master cylinder filler cap (2162). Check fluid level in brake master cylinder reservoir (2K478). Remove brake fluid until brake master cylinder reservoir is half full. Discard removed fluid.
   

1. Raise vehicle on hoist. Refer to Section 00-02 .
   

1. Remove wheel and tire assembly from front disc brake rotor mounting face. Use care to avoid damage or interference with disc brake caliper (2B120), front disc brake rotor shield (2K004) or front wheel knuckle (3K185).
   

1. Remove rear brake pin retainers (2N386). ( I think it is a T 40 torx bit you need)
   

1. NOTE: It is not necessary to disconnect hydraulic connections.
   
   Lift disc brake caliper from front disc brake caliper anchor plate (2B292) and front disc brake rotor (1125). Do not pry directly against metal caliper piston or damage will occur.
   

1. Position disc brake caliper out of the way and support with wire to avoid damaging the disc brake caliper and front brake hose (2078).
   

1. Remove outer brake shoe and lining (2001) assembly from front disc brake caliper anchor plate.
   

1. Remove inner brake shoe and lining assembly.
   

1. Position lug bolt (1107) to clear front wheel knuckle (3K185).
   

1. Remove lug bolt from wheel hub (1104).
   
   
   
   

Installation

1. Install lug bolt into wheel hub.
   

1. Using a lug nut (1012), seat wheel hub bolt into wheel hub.
   

1. Install front disc brake rotor and disc brake caliper. Refer to Section 06-03 .
   

1. Install wheel and tire assembly. Tighten lug nut to 115-142Nm (85-104 lb-ft).
   

if the pulsating in the steering occurs while braking this is an indications that the rotors are out of round and need to be turned or replaced. if they are causing a pulsating while driving without braking it could be the calipers sticking.

your back brakes will be cooler than the front brakes as the majority of braking is done ith the front brakes even on four wheel disc brakes. hope this helps.

If your brake lights don't work Its because you blew the fuse  which Is located In the main fuse panel under steering wheel.  Without break lights your rover will fire up nice but wont shift out of park until you replace the fuse.  If your ABS Is acting up It Is also an easy fix.  Disconnect the ABS from each wheel.  You still got all wheel disc breaks that work great but no ABS.  Your other option is  thousands of $$.  If your breaks are weak check your master cylinder and make sure you got enough fluid and that you are not loosing the fluid.  If you notice you are leaking brake fluid because you have to keep filling it up but cannot find a leak anywhere.  I bet I know where It is.  Check your rear break lines and make sure one of them didn't get caught in your rear springs and pinched ever so slightly when you were doing dounuts In the snow.
Good luck,