The SunCoast 4R100 Billet Forward Drum is machined from 4140 heat-treated, stress-relieved steel, which eliminates stripping of the input spline. It also increases the clutch frictions from 4-6.
For 4R100 transmissions only: this forward drum will only fit 7.3L Super Duty models that have 4R100 transmissions. Please verify your truck's transmission type before ordering.