just recently i swaped a new rear into my car. its go the aluminum drums on it. i dont plan to keep the drums, this winter id like to do LS1s to match my fronts. but anyway onto my problem. everything is fine when driving. i had to adjust my e brake to get the new cables on the car. what happens is when i get on the brakes the car kinda shutters from the back. like i can feel a pulsastion thru the car and thru the pedal. i bled the brakes twice already and it still there. any idea what my problem is? its got me stumped.
matt

 

Drums out of round? I'd check that first.

 

hmm never thought of that. ill have to look into it. any idea how to check to see if they are round or not. im hoping this is a cheap fix as im compiling parts for the rear LS1s do id rather not throw money at the drums, ya kno.
matt

 

Check a machine or brake shop, they'll usually charge you around $10-12/per to turn but should check them for close to 0$. New steel replacements are around $22-25/each at AZ or the equivalent.

If they're out of round or badly out of balance (most al drums will have weights on them) they're probably warped or thin and may need replacement. A newer set from a JY may be a good gamble if you're looking for cheap, especially if the yard will take them back if the shop says no-go.

 

figured it out. the aluminum ones were warped. put the steel ones back on and its fine now. the search for disc swap parts starts.
matt