A drive system includes a drive housing and one or more drivetrain cartridges. The one or more drivetrain cartridges enables better manufacturability by allowing drivetrain components to be installed together outside the housing and then installed as a unit together into the housing. Serviceability is improved by allowing one or more of the drivetrain cartridges to be removed individually from the housing for maintenance or repair. The housing may include mounting surfaces to securely engage the one or more drivetrain cartridges to the housing to prevent play. The housing may include a bottom or side panel with installation mounts to fasten the drivetrain cartridge or cartridges securely to the bottom or side panel of the housing.
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