John D Rockford , IL March 01, 2015 Appliance: Whirlpool Washer WTW4950XW3 Whirlpool Washer Wtw4950xw3 / : Replaced the gearcase in my whirlpool washer. How to replace Washer Gear Case. Removed water pump and electric motor to access the gearcase, fairly simple fix 6 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours