Allison 5sp: Upgrade needed?

wfc09

New member
Sep 11, 2014
40
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Ky
My motor is out right now being built, my delima is that I'm not sure if my current transmission Will hold the power my truck should put down when it's done. Right now It has a stage 4 ppe kit with a precision billet stator 2300 rpm stall. The whole build only has about 10k miles on it. Is there anything I can do to make the current transmission hold more or do I need a whole new set of clutches? Needing it to hold 850 rwhp