You lose it at 2200 cus you're defueling the wastgate is preset to 17 pounds on a 35 BTW. I would do the 3200 springs unless you feel the need for 4ks don't pull your plat unless you wanna buy a new trans and if the trans is jumping out of overdrive have the governor pressure checked on the trans the regulator may be going out

 

Hmmmm

And the wastegate depends on the year/HP rating of the truck: 15-18 for the 160, 175, and 180 trucks and 21-23 for the 215 trucks.

Do the plate work and eventually the gsk and see where that gets you.

 

You know I just remembered something a buddy of mine broke a few blades off his exducer wheel caused somewhat of the same problem you are having we pulled the head to see what broke and it was all good as it turns out the exhaust housing on the charger was so rusted it scaled and wham broke wheel. That's worst case scenerio tho