curmudgeon

Rear drum brakes need replacing. Seems, though, I have two sizes of shoes.
The leading shoe (towards front of truck) has 10" of pad length
The trailing shoes measures 12" of pad length.
The parts store says this Tahoe should have either 10" or 11" shoes.

What the answer here?!

Curmudgeon

aarcuda69062

Drum diameter, not length of the friction material.

steve

The shoe facing the front of the vehicle is designated the "secondary" while
the shoe facing the rear of the vehicle is the "primary". The primary shoe
does more of the stopping due to the physics involved with a vehicle moving
forward and therefore has a longer surface area to contact the drum. Some
vehicles have both primary and secondary shoes of the same length.

There are two different brake options on Tahoes depending on which
suspension package the vehcile was built on. That determines whether 10" or
11" diameter brakes are used. measure the inside diameter of the drum to
determine which one you have.
--
Steve Spence
Independent AMSOIL Dealer
AMSOIL - The "Once A Year" Oil Change
Unemployed Car Guy - Trying to Earn A Living
35 Years of GM Parts Experience
http://synthetic-oil-tech.com/1690163
amsoil1@charter.net

curmudgeon

Thanks guys - I now understand its the drum diameter - not the pad
length. The parts store made it sound otherwise.

Curmudgeon

aarcuda69062

WRT your above description primary versus secondary, backwards again.

Nope, striclty a function of the direction of rotation of the drum.

Typically found on single servo brakes.


At first, it seemed that you were replying to me.
it is now obvious that you know as much about using your news client as
you do motor oil.