Rear pass brake locking up.

[Fern]

Im having an issue with the rear pass brake locking up. The driver side dosen't seem to be locking. It has discs in front and drums in back. Power brakes.

70 Challenger.

thanks

By the way there new and nothing leaking on pads.

[dutch]

Are you sure you dont have a leaky seal on the other side?  Factory disc/ drum set up most of the time locks up rear before front, so if the driver side doesnt brake, the Pside will lock up real quick.

[burdar]

Since the wheel cylinder or axle flange gaskets aren't leaking on the shoes, are you sure you have them adjusted the same on both sides?  Moisture and excessive brake dust can cause this as well.  Are the wheel cylinders new?

If you put the rear up on stands and have someone step on the brakes, can you turn the DS rear wheel?  Is the E-brake cable on the PS holding the shoes partially applied?

[RzeroB]

I had the exact same problem on a 70 Chally with PDB up front and drums in the back. Turned out to be the wheel cylinder. Didn't leak or anything but apparently there was some "NSC" (non-specific crud) inside of it that was causing the pistons to stick and cause the wheel to lock up. Changed out the wheel cylinder and it cured the problem.

[Fern]

Since the wheel cylinder or axle flange gaskets aren't leaking on the shoes, are you sure you have them adjusted the same on both sides?  Moisture and excessive brake dust can cause this as well.  Are the wheel cylinders new?

If you put the rear up on stands and have someone step on the brakes, can you turn the DS rear wheel?  Is the E-brake cable on the PS holding the shoes partially applied?

I thought the rear brakes self adjusted by driving in reverse?
I will pull the wheel off this weekend and see if the driver side is braking, and check for brake dust.
In which direction does the adjuster spin to put less braking on the pass side.

Thanks

[Chryco Psycho]

Make sure the longer shoes is on the rear & the shorter shoe is in front on both sides , easy to reverse them .
 through the adjuster slot you want to rotate the adjuster wheel upward , looking from the front it would be CCW form the rear of the car CW

[Fern]

Make sure the longer shoes is on the rear & the shorter shoe is in front on both sides , easy to reverse them .
 through the adjuster slot you want to rotate the adjuster wheel upward , looking from the front it would be CCW form the rear of the car CW

Adjusted the brake and made a huge difference. Still not perfect but a big improvement.

Thank you 

[burdar]

You need to adjust the brakes to start with.  Driving in reverse will keep them adjusted.  You need to adjust them so they drag slightly while spinning the drum.

Have someone pump up the brakes and hold them down while you bleed the wheel cylinders.  See if there is the same amount of pressure coming out of both sides.