Originally Posted by jnicewan
Unless there are drums out there that are different the band width shouldn't matter. The drums were all the same size diameter and width. Meaning if you have the smaller band you can install the larger band. It would be better to have the larger band but don't go the other way.
There are two different band drum diameters. A 6" diameter drum which I have found as late as 1993 and a 6-1/4" drum which I have found as early as 1989. Go figure.
Not only that, but both drums came in two bushing configurations. A single wide bushing or two narrow bushings meaning that the drum tower changes at the same time.
And, of course, the drums were machined for 3, 4, or 5 frictions, for a total of 12 different band drums that I have found in 42RL/42RE/44RE transmissions.
Only easy part is they are all the same length when measured from thrust washer to end of drum (band surfaces are SOMETIMES different widths between 3-/4- and 5-friction drums).