Hi all, I have an elderly neighbour with a john deere 350 dozer that has had a major fail in the final drive. i've volunteered to help rebuild it and the two main jobs are to sleeve the output bearing/duo-cone seal location and to make a new pinion shaft. I've made quite a few gears before but they've all been smaller metric types and use 20 degree pressure angles. This little dozer's pinion (13T) looks to have a pitch of 3/4" and a tip diameter of 3.661" but i don't know the pressure angle and am struggling with the DP online calculators... I'm wondering if anyone has experience with these machines and can advise what cutter i should be looking to buy... thanks