05-26-2021, 06:34 AM
Howdy lazz and welcome to the forumUpshift. Your ex is a 6 speed. or are you running really fast? 3500-4000 rpms in 6th would be 75 - 90 mph
A lot of us run around on this thing at 2500-3500 rpms
You could also downshift and get above 4500 rpms where it smooths out again
inline 4's do have an inherent buzz in the 4000-4500 range so work your gearbox around that range
