Rotor brake hub cant get off brakes frozen - 1991 Geo Storm

Personally I would replace both rotors to prevent a future brake imbalance.

* chock rear wheels, raise front of vehicle and place on stands.

* remove wheels, remove brake calliper and bracket assemblies.

* remove bearing hubs from axles, via removal of bearing adjustment nut

*remove hub seals, clean and inspect bearings, repack with HT bearing grease.

* the brake rotor bolts to the rear of the hub, you will have to remove and replace rotor to hubs, make sure all bolts are thread locked with loctite 263 and tensioned to spec.

* pack hub with grease, install seals, fitt hub assembly and adjust wheel bearing preload, install new split pins.

* fitt brake calliper and brackets, fit new brake pads,

* fitt wheels lower vehicle, test brake for function

Hope this helps..

depending on which wheel in front can be brakes --pad broke and wedge between rotor and caliper ,caliper frozen ,transmission coupling binding or damaged ,hub [wheel bearing] frozen ---with the rear add emergency brake frozen or damaged

holden commodores are know for vibration when braking know as brake shudder.

To correct this replace brake pads and machine disc rotors .
Clean hubs before refitting disc rotors .
Check and make sure you can achieve the run-out within holden specifications .
To achieve the correct run-out Front disc need to be under 0.5
and 0.8.
When doing run-out place front disc back on hub once all surface areas have been cleaned .
secure disc on hub with wheel nut just even so its all flush.
Then use a dial gauge and measure run if you can achieve on 1st stud move around all studs if u still cant get the front within 0.5 replace hub.
follow same procedure for rear but remember rear is0.8..

Depending on the year and model, it may just be rusty- frozen on the hub. Sometimes you have to use a very large hammer to break it loose. But using a hammer may damage it beyond the point of being useable.

Could be a number of problems. Here are a few.

Defective Brake Pads

Brake pads that are defective and/or incorrectly installed can, over time, cause brake rotors to warp and become damaged. Brake pads are responsible for squeezing against the spinning brake rotor, an action that causes a vehicle to slow down or stop. If the brake pads are bent, misshapen in any way, or aligned and/or installed abnormally, they can exert abnormal pressure on the brake rotors, a condition that can cause brake rotor warpage over time.

Abnormal Brake Caliper Action

An abnormal or malfunctioning brake caliper can result in brake rotor warpage if the degree of brake caliper dysfunction is severe enough. A brake caliper houses a set of vehicle brake pads and provides the squeezing force necessary to squeeze the brake pads against the spinning brake rotor. If a brake caliper applies too much pressure to the brake pads, or if it applies pressure inconsistently, it can cause a brake rotor to warp over time. Adequate brake caliper action is necessary for optimizing brake pad and brake rotor function.

Excessive Heat

A vehicle's braking system generates a tremendous amount of friction-related heat, heat that normally gets radiated away from the brake pads and brake rotor mechanisms. However, in cases where excessive heat is generated within a braking system and not dispersed adequately, serious brake malfunctions can occur, which can include brake rotor warpage. A stuck brake caliper, old, worn-down brake pads, or a defective brake rotor can cause excessive heat to develop in or around a brake rotor, which can cause brake rotor damage and warpage.

Damanged Wheel Hub Spindle

A brake rotor assembly is supported by and rides on a long, slender metal tube called a hub, or wheel hub assembly. The hub is what allows for the smooth, even circular motion of the spinning brake rotor. Designed with a smooth, low-friction exterior, the wheel hub assembly is critical to the proper spinning motion of the brake rotor. Any abnormalities or defects with the wheel hub assembly, including hub warpage, cracking or misalignment, can cause abnormal brake rotor rotation, which in turn can cause brake rotor warpage over time. Normally, a damaged wheel hub assembly is noticed and remedied prior to extensive brake rotor damage, as a severely damaged wheel hub assembly will cause a vehicle tire to wobble and shake.

The brake rotors on a Toyota Matrix are an extremely important aspect of the brake system. Over time, the rotors, which are the round disc that the caliper and brake pads clamp when the brakes are applied, can get scored, warped or simply wear too thin from use. Rotors should be regularly inspected for wear and replaced if necessary to ensure that your Matrix's brakes function properly and safely. Replacing rotors is a simple job that can be done in a few hours

Loosen the lug nuts that fasten the wheels on. Raise the Matrix with a jack and support it securely with jack stands. Remove the wheels.

2 Clean the brake caliper, rotor and nearby areas with brake cleaner and a clean rag. Make sure there is no dirt, oil or contaminants on the brake components.

3 Remove the bolts that hold the caliper to the caliper mounting bracket. There will be two bolts that can be removed with a socket and ratchet or an open-ended wrench.

4 Slide the caliper off of the rotor. Support the caliper with a piece of wire or string so that the weight of it is not on the brake line, which could be damaged from the weight of the caliper.

5 Remove the caliper mounting bracket by removing the two bolts with a ratchet or an open-ended wrench. Set the bracket aside.

6 Pull the rotor straight off of the hub. On the Matrix, the rotors are not bolted on with anything, once the wheel and the caliper are out of the way. However, the rotor may be frozen onto the hub from years of dirt and rust. Use a rubber mallet to tap the rotor off.

7 Replacement is the reverse of removal.

Remove the tires.
Remove the brake hydraulic caliper.
Remove the brake pads.
Remove the brake hydraulic caliper mounting bracket.
Now the rotor is free to be pulled off. If it is frozen on, than a little WD40 at the center hub and a little taping with a hammer will free it.
PS:sometimes there is a small screw that mat be holding the rotor to the hub-- may have to remove that first.

something is not right if you replaced brakes 2 mounths ago it cant need new ones, ask why,maybe a frozen caliper? anyway i would have another shop take a look, see what they tell you. or pull the wheels and you take a look,hope this helps.

REMOVAL & INSTALLATION Front Brakes

1. Raise and safely support the vehicle.
2. Remove the wheel and tire assembly.
3. Unfasten the disc brake caliper retaining bolts.
4. Remove the disc brake caliper and secure the caliper aside with mechanic's wire. Do not disconnect the brake hose.
5. Pull the brake rotor from the hub.
6. Inspect the rotor and refinish or replace, as necessary. If refinishing, the minimum thickness rotor thickness is stamped on the brake rotor.
7. To install:
   
8. Place the brake rotor to the hub. Make sure the mating surfaces are free of rust which may prevent the brake rotor from seating properly.
9. Remove the mechanic's wire and position the brake caliper.
10. Install the brake caliper retaining bolts to specification.
11. Install the wheel and tire assembly.
12. Lower the vehicle.
13. Pump the brake pedal several times to position the brake pads before moving the vehicle.
14. Road test the vehicle and check the brake system for proper operation.

It sounds like your hub/rotor is froze on....you'll need to apply some penetrant in the lug stud areas as wells as the area where the rotor mates to the axle hub.

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).