brados:
Carryfast:
Just ask for an Allison workshop manual and parts catalogue.They’ve been putting PTO’s on Auto boxes used in fire trucks for years.I used to drive a Foden tipper with an Allison auto box, PTO was simply engaged by a leccy switch on the dash, when the big red light was on you could pull the lever to tip, it even worked when you were driving along as well
Just like the ones on those fire trucks which I used to drive. 
