Okay guys, needin some help here.
I have just done the d60 swap. At the same time I changed my wheel-tire combo from stock 16s with 265/75/16 (31") to 17s with 305/70/17 (33.8ish) After initially driving home (which was smooth), I have acquired a strange vibration or shimmy that feels like the truck doesn't have enough power to push these tires. Going up a hill with no load, it slows down quite a bit unless I really push the pedal where before it didn't struggle like this. The truck currently has 3.55 in the rear and 4.10 up front (obviously not engaged).
Assuming there is nothing wrong with the trans, would changing gears help this? Or would a chip give the truck enough power to overcome this issue?
'97 F250 CC SB - Dana 60 Swap, 4.10s, Tymar intake, 3" DP, 5" Diamond Eye straight pipe, ISSPRO Gauges (Boost, Pyro, Trans), Tru-Cool Max trans cooler, Swamps IDM