Rear brakes scrubbing are they pads or drums

SOURCE: rear brakes scrubbing on 1998 chevy venture van

Removal Procedure Tools RequiredJ 38400
Caution: Keep fingers away from rear brake shoe springs to prevent fingers from being pinched between spring and shoe web or spring and backing plate.

1. Remove the brake drum. Refer to Brake Drum Replacement



Notice: Do not over stretch the adjuster spring. Damage can occur if the spring is over stretched.

2. Use the J 38400 in order remove the adjuster spring (1). Disengage the adjuster spring loop from the tab on the adjuster actuator.
2.1. Remove the loop end of the adjuster spring from the adjuster actuator. 2.2. Remove the straight end of the adjuster spring from the secondary brake shoe.



3. Use the J 38400 in order to spread the brake shoes apart.
4. Remove the adjuster.

1. Use the J 38400 in order to spread the brake shoes apart.



Important: Ensure that the adjuster (2) engages the brake shoes (4 and 5), the park brake actuator (3), and the adjuster actuator (1) properly.

2. Install the adjuster.



Notice: Do not over stretch the adjuster spring. Damage can occur if the spring is over stretched.

3. Install the adjuster spring (1).
3.1. Install the straight end of the adjuster spring into the secondary brake shoe. 3.2. Install the loop end of the adjuster spring to the adjuster actuator.
4. Install the brake drum.

SOURCE: how to Remove rear brake drum to replace pads.

hi! the pads will be rutted into the drum, you need to release them first with the cables backed off and the cams wound down, then just tap off the drums!

SOURCE: Toyota Camry 2005-Brake pads noise problem

The rear brakes should last from 30000 to 60000 miles or 50000 to 100000 kms. So something is wearing out your brakes too fast. Are you doing the work or some shop. I also assume you have discs and not drums since you mention pads and calipers. I am not certain but usually you need a tool to turn the pistion in when putting in new pads. I would make sure the pads are releasing properly by raising rear of car, stepping on brakes a few times (with engine off and try see if wheels are free by spinning by hand, also try to use handbrake a few times and release it and see if wheels spin freely. Maybe rears always applied. Notice burning smell, are discs glazed from heat? Are you using really cheap pads. Also check the proportioning valve which will decrease pressure to rear brakes during hard braking. Do you notice rear wheels squeling during hard braking. Do you have antilock brake system? Also are you using good quality pads and rotors.

SOURCE: Rear Drum Brake Install

Removal & Installation

1. Raise and safely support the vehicle.
   
2. Remove the wheel and tire assembly.
   
3. Remove the drum retaining nuts, if equipped, and remove the brake drum.
   

1. Inspect the brake drum for scoring and wear. Replace or machine as necessary. If machining, observe the maximum diameter specification.
   

1. If a new drum is being installed, remove the protective coating from the drum using brake cleaner. Sand the drum lightly and wipe with a cloth soaked in denatured alcohol.
   
2. Adjust the brake shoes according to the procedure in this Section.
   
3. Install the brake drum and the wheel and tire assembly.
   
4. Lower the vehicle.
   

SOURCE: e brake diagram in rear drum- how does e brake

Here are some pictures. I hope these help you.