Shudder in reverse

[Highland boy]

Have a 1993 Toyota ext. cab truck with 4 cyl. auto and 220,000 Km. I am getting a shudder when the truck is put into reverse. The shudder or vibration can be felt in the steering wheel and the front fenders. I get this only when the truck is under a load, for example, backing up a hill. I can mimic the condition by putting the tranny in reverse, holding the brake on and reving the engine slightly. I suspect a problem with a transmission band (adjustment needed?) or a clutch? Wondering if anybody has had a similar problem or knows what the problem is. Help is greatly appreciated.

[justin22]

when was the last time you had your brakes adjusted on the rear

[Highland boy]

Rear brakes are adjusted up. Not sure how this could cause my problem. Could you explain?

[justin22]

if the brakes stick on they will slip inside the drum.