Will the drive belt on a 2001 Dyna being to tight blow the transmission seal?
Yes, but be aware that many other underlying issues can cause this area to leak like mileage, not properly torqueing the sprocket nut and if the sprocket and spacer were updated. Please keep in mind that, this area has a number of components that create a seal. The inner spacer and quad seal should always be replaced as a pair. Make sure belt tension is being set in the tightest position with rider and passenger weight on the motorcycle. Wrench Safe, FMH