FP Gearbox Ratio

[Akash Rastogi]

Originally Posted by Vikesrock

The reason I ask is that we have motors from a previous year (of the appropriate model number) with the 19 tooth pinion. If some teams received the motor with the 19 tooth pinion or if a COTS 19 tooth pinion is available it should be legal to use these motors.

Is there an easy way to pull the pinion off an old FP and re-fit it onto the new ones?

[MrForbes]

Still needs to be COTS.....and no, there is not an easy way to get them off. It's possible to get the gears off, but it seems to require building your own strong gear puller.

[Vikesrock]

Originally Posted by Akash Rastogi

Is there an easy way to pull the pinion off an old FP and re-fit it onto the new ones?

The idea would be to switch the whole motor with pinion attached. The 2008 and 2009 motors are the same as the ones this year with the exception of the pinion.

As Mr. Forbes posted, it is possible to get the pinion off. Teams have done this to use the FP with Banebots and AM Planetary gearboxes. Once you do get it off though I'm not sure if you could put it back onto a different motor.

EDIT: As the FP with 19 tooth pinion appears to still be available from AM I think it's time for me to head over to the Q&A and see what the GDC thinks about this mess.

[sanddrag]

You can get the gear off with a pin punch in an arbor press, with a custom milled plate with a slot to hold it. Or, if you don't care about destroying the gear, you can crack it with a nut buster.