Dewalt Motor Transmissions?

[pjlap]

I'm new to FIRST this year and even though my team is in its 5th year they have never used anything other than the CIM motors. We have recently come up with a design approach for our robot that included using 2 P60 transmissions with a BB550 and another P60 with BB 395. Since there is a backlog for them I am exploring trying to use drill transmissions instead.

Is there a document that states what is legal with regards to using drill transmissions for gearboxes? Can we use the keyless chuck as well or do we need to come up with some other way to adapt the drive shafts?

Or is there some other solution that might be a better option?

Any help would be appreciated. I am an EE in an ME's world and unfortunately I'm the resident expert on my team. (I knew I should have paid more attention in Statics and Dynamics.)