P32 Rear Drum Brake Wear

i changed mine at 57000 lots of shoe left so i cant answer the wear they are self adjusting

You could have a out of adjustment brake, brake pad sticking on the backing plate, weak springs,wheel cyclinder sticking, they have two pistons, and remember they pivot at the bottom. Check wear on drum.

The only reason I thought the trailing brake shoe would wear faster is based on post below from a JEEP forum; my wear patters is the opposite. I have no idea whether trailing or leading shoe wears quicker and was just curious if my wear pattern is normal.

BELOW IS POST FROM JEEP FORUM:Passenger car drum brakes since at least the early 1950s have been of the "self-servo" persuasion. In the "self-servo" design, when the brakes are applied, the leading (forward) brake shoe moves into contact with the rotating brake drum. The entire brake shoe assembly (both shoes and misc. hardware) then pivots rearward from the top and "wedge" the trailing (rear) rear brake shoe into the rotating brake drum.

Have you noticed that the brake shoes and connecting hardware are not solidly attached at the bottom of the backing plate? That is a deliberate design feature. It allows the entire brake shoe assembly the limited amount of play required to pivot.

The idea underlying the "self-servo" design is that the "wedging" (not to be confused with a "wedgie" ) action multiplies the braking force applied by the driver and makes for lower brake pedal pressures required to stop a moving vehicle. That became an important ergonomic design consideration as the cars of the early fifties went on steroids and became larger and larger and heavier and heavier and faster and faster - increasing brake system loading.

Keep in mind that vacuum-assisted power brakes were not available or available only as a high-cost option on many cars of the period.

It is inherent to the "self-servo' design that the trailing brake shoe actually provides most of the stopping power. Hence, the trailing brake shoe will wear faster than the leading brake shoe, and that is also why there is more brake pad material on the trailing shoe? (A way to tell them apart.)

Just took some measurements on remaining shoe lining thickness.
Leading shoe = 3/32
Trailing shoe = 6/32

Note I measured from the rivet holes, not the outside eadge of the shoe. I assume 3/32 is worn enough I should just replace the shoes/springs and cylinders (any maybe flexible brake hose?); especially since one side is completely torn down.
:h

Greg, your post says you have a 1995 p-chassis. I have a 1990 and 1991 Pace arrow on the P-chassis. They both have disc brakes all 4 corners. I thought after 1989 they stopped using drums and went with disc. Anybody know for sure? Just curious.

Tim,
I definitely have drums on the rear. Not sure when/if they quit using drums. Maybe for smaller (mine is 27') MH they used drum and disc for larger?

All,
I picked up new shoes earlier today and found out that my shoes are hardly even worn; maybe 1/32 or 1/16 at the most. Also noticed that the trailing shoe lining is definitely much thicker, so my wear pattern appears to be normal. I will return the shoes, springs, cylinders since I don't really need new shoes at this time - this was more of an inspection, fluid change. It was all worth it because I also found that one of my wheel studs had 2-3 threads completely stripped. Back to the auto store for new HW. I will replace them all and get new nuts as well.

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