2007.5 dodge ram 2500

6.7 Cummins with the 68rfe trans, bd manifold with a silverbullet 71/83 industrial injection turbo, S&B intake, arp head studs, stock lift pump, 5 position power switch on moonlight tunes, pyro and boost gauge on pillar, after market trans cooler lines, heat and A/C both work, no rips in seats, 2 12” subs under back seat, 5k helper air bags on rear, front diff, rear diff, transfer case recently serviced, front steering stabilizers, 3” leveling pucks, Bilstein shocks front and rear, inner axle u joints recently replaced, recent replaced longer front control arms to center front axle better, recently replaced CCV filter, recently replaced alternator and belt, only issue is the trans, I think it needs a throttle body, sometimes it gets stuck in 4th gear and sometimes it shifts through all the gears without issue. not sure what’s wrong just don’t have time to repair, well maintained truck other than the transmission truck made 500hp and 1000 ftlbs torque on the dyno a few years ago runs great with no leaks.motor was gone through about a year ago, new head gasket and surfaced head. Bottom end was perfec.