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I was rereading the rules on jack marshals a few days ago, and I fear I may have either initially misread a rule, or at the very least I've convinced myself I've misread it. When using a marshal's drive, do you make the roll for the drive and utilize its effects during the marshal's activation, or the jack's? Also, in the event of a failed drive roll, does one simply lose access to the ability to boost or charge? Or does something else happen?

I apologize if this seems a bit noobish. It's just a point I'm a bit confused on.

When you activate the "drive" you do it during the marshall's activation. The effect can be immediate (like pronto) or have to wait for the Jack to activate (like reroll). Just read the drive and it should explain itself as to when it is used.
If you fail your "drive" roll then the Jack can not avail itself of any of the special marshall abilities (ie., boosed attack or damage, the ability to charge, make an extra attack, etc.).