I need to replace the rear wheel cylinder and break shoes

On these old manual brake systems without automatic adjusters you have to set the shoe clearance by turning the adjuster on each shoe out so the shoe is very close to the drum. If there is too much clearance between the shoe and drum the shoe will move as far as it can and never touch the drum, this will make a low or no pedal pressure.

if the brakes over extend the cylinders will pop, make sure you have properly adjusted the brakes, also make sure the emergency brake cable is working and not stuck partway on which will hold the shoes away from the cylinder.
the shoes should be adjusted so that you spin the wheel and it turns twice and stops.

I would suspect you have a problem with ABS control valve if you are sure grease from the rear diff isn't getting on the shoes.

After you remove the tire, the drim should slide off. If it doesn't then try using a rubber mallet and gently tap on the outside edge as you pull on it. Sometimes you also need to tap on the drum in the center part. I have sprayed penetrating lubes like WD-40 or PB Blaster into the seam at the center. You may also have to back off the parking brake cable or even use the adjuster to back off the shoes.

Most likely rellted to the rear wheel cylinder. You need to remove the tire, probably replace the brake shoes if they are wet with fluid, wipe down brake drum with carb or brake cleaner, install new wheel cylinder and put everything else back together. Wheel cylinder is available through most auto parts outlets. Probaby less than $15.

I assume the rear shoes where replaced,was this a problem before replacing the rear shoes?Adjust the rear shoes out to where the wheel drags just a littl when turning it by hand,then if you need to,bleed the brakes,bleed the master cylinder,then the right rear,left rear,then right front,and left front,do not run out of brake fluid during this proccess.

2 places to check 1. look at the rear wheel backing plates for moisture 2. pull the master cylinder back and look for fluid in the vacuum booster. if leaks at the rear its going to be rear wheel cylinders which will require replacing wheel cylinders and shoes. if the vacuum booster is full replace the master and booster.

ALL YOU CAN DO IS FLUSH WITH CLEAN FLUID PUMP AND BLEED NOTE: ALWAYS START FROM THE FURTHEST WHEEL FROM THE MASTER CYLINDER AND WORK YOU WAY BACK. SOME TIMES YOU CAN OPEN THE LINES WITH COMPRESSED AIR WHEN YOU DISCONNECT ALL THE LINES FROM THE CYLINDERS

Drum, Rear Brake System Standard Rear Brake

Item Part Number Description 1 2069 Brake Shoe Hold-Down Spring Pin 2 — Rear Wheel Cylinder Retaining Bolt (2 Req'd) 3 — Washer (2 Req'd) 4 — Anchor Pin (Part of 2211) 5 — Wheel Cylinder 6 2028 Brake Shoe Anchor Pin Guide Plate 7 2A637 Parking Brake Lever 8 2296 Brake Shoe Retracting Spring (Short) 9 2296 Brake Shoe Retracting Spring (Long) 10 2200 Rear Brake Shoe and Lining (Secondary) 11 — Washer 12 2106 Parking Brake Lever Pin Retainer 13 — Brake Shoe Adjusting Lever Cable Guide 14 2A642 Primary Brake Shoe Parking Brake Lever Link 15 2A601 Parking Brake Link Spring 16 2068 Brake Shoe Hold-Down Spring 17 2A176 Brake Shoe Adjusting Lever 18 2048 Brake Shoe Adjusting Screw Socket 19 2047 Brake Shoe Adjusting Screw Nut 20 2041 Brake Adjusting Screw 21 2049 Brake Shoe Adjusting Screw Spring 22 2200 Rear Brake Shoe and Lining (Primary) 23 2A178 Brake Shoe Adjusting Lever Cable 24 2211 Brake Backing Plate
Heavy Duty Rear Brake

Item Part Number Description 1 — Rear Wheel Cylinder Retaining Bolt 2 00538 Lock Nut 3 2212 Rear Brake Backing Plate 4 2262 Rear Wheel Cylinder 5 2A642 Primary Brake Shoe Parking Brake Lever Link 6 2A601 Parking Brake Link Spring 7 2A637 Parking Brake Lever 8 2106 Parking Brake Lever Pin Retainer 9 — Parking Brake Lever Bolt 10 — Secondary Shoe Assembly 11 2A179 Brake Shoe Adjusting Lever Cable Guide 12 2068 Brake Shoe Hold-Down Spring 13 — Adjusting Lever Pin 14 — Adjusting Lever Return Spring 15 2A176 Brake Shoe Adjusting Lever 16 2047 Brake Shoe Adjusting Screw Nut 17 2049 Brake Shoe Adjusting Screw Spring 18 2041 Brake Adjuster Screw 19 — Primary Shoe Assembly 20 2068 Brake Shoe Hold-Down Spring 21 2200 Rear Brake Shoe and Lining 22 2035 Brake Shoe Retracting Spring 23 2A178 Brake Shoe Adjusting Lever Cable 24 2092 Brake Adjusting Hole Cover 25 2069 Brake Shoe Hold-Down Spring Pin
The rear drum brakes:

• Have internal shoes that expand against the brake drum (1126).
• Are a single-anchor type.
• Are actuated by one rear wheel cylinder (2262).
• Have two pistons in the rear wheel cylinder (2261). One exerts force against the upper end of the primary shoe; the other exerts force against the upper end of the secondary shoe.
• Adjust rear brake shoes and linings (2200) automatically.
• Need manual brake adjustment if the adjusters are not operating properly or after the rear brake shoes and linings have been replaced.

When the brake pedal is applied, hydraulic fluid pressure forces the pistons in the rear wheel cylinder outward, moving the rear brake shoes and linings against the brake drum.
The rear drum brake system includes the parking brake mechanism. Refer to Section 206-05 .

The Chardes have a diagonal split system, so one of the front discs is plumbed to the diagonally located rear drum.

You may need to check the front brakes too and that they have been bleed properly.

Other common cause of uneven braking are:

seized wheel cylinder;
brake hose obstruction or weakend wall;
weak pull off spring on shoe;
uneven drum roundness;
compensator/proportioning valve dicky.