Mods in sig are still current, tonite i was doin a few high speed runs on the autobahn with the cutout on and the car starts to vibrate at like 90 and gets really bad all the way till i throw it in fifth and at about 120 my car just kinda feels like a brick wall is stoppin it from goin ne faster i mean it goes a lil faster but does not pull as hard as i would think it would, and when i let off the gas it vibrates like crazy, the previous owner claims there is an alum driveshaft in the car, and when going slower and turning in 360 i hear grinding coming from the front of my car like from maybe a bushing or sumthing in my front suspension, so im thinking maybe a tranny mount, driveshaft balancing, new front tires and alignment may do the trick and leave the cutout off but im confused i thought the cutout being capped allows for more top end pull? Any advice or help on any of these symptoms would be nice...
Vince