parts listed below
Full removal, diagnosis and repair of a 2005 Bolens Riding mower transmission That clunks/pops and lacks forward gear. Transmission part number is MTD 61804034. This transmission and it's variations are used in Mowers built by MTD and utilizing the Varidrive system.
Parts used:

Bevel Gear MTD 91704056 https://amzn.to/2YdMICt
Collar clutch MTD 91804045 https://amzn.to/2Vrl1sY
Thrust washer MTD 9360495 https://amzn.to/2PTsL0S
Super S cottonpicker NGLI 00 grease
or
Stens 770123 NGLI 00 Grease https://amzn.to/33wrC4y