Pinion angle with Monoleafs and CalTracs

Hi all,

I have Monoleafs and CalTracs on my Duster. Gearbox is TKO 600. On first full power launch i break my drive shaft rear u-joint. That happend when i powershift second gear in. U-joint was new and size 1350 (Whole power chain is brand new).

So, what would be correct pinion angle with Monoleafs and CalTracs? Gearbox is now about 2 degrees down.