New Style - Mounting Flange is Metal 

Improved Heavy Duty Gear Box Replacement Wheel Motor -

 

Fits the following Models:

 320 - 330X - 420 - 430X - 430X NERA - 430XH - 435X AWD - 440 - 450X - 450X EPOS 450X NERA - 450XH - 450XH EPOS - 520 - 520H - 535 AWD - 550 - 550 EPOS - 550H - 550H EPOS