Aluminum Rear Drums
by George Nenadovich
Here is an aluminum rear drum on the left and the standard
cast iron drum on the right. The aluminum drum is about 8 lbs lighter than
the cast version and dissipates heat much better than cast iron. Aluminum
rear drums were introduced in 1978 and ran until 1987. I have found most
of them from 1978-1981 models. They are most common on the GM G-bodies such
as Cutlass, Regal, Monte Carlo and Le Mans.