Originally Posted by jmanrex
i just have a couple of questions before dropping the cash
i was reading the iwsti forum that people were having vibration problems because of harder bushings that they installed and i could narrow it down to the tranny crossmember bushings and the rear outrigger bushings--my question is does that apply to the tranny mount ?? also what about the shifter bushings??
The Vibration problems were associated with having only one of the following bushings installed:
related to the tranny mount bushing and the
rear diff bushings
The individuals that complained about the vibrations had one or two of the above types of bushings (not counting the short shifter bushings which never were reported as the problem). When they either removed the bushings in place of the stock bushings or installed the other set of bushings, the vibration went away.
What we recommend is no bushings if you want minimized noise and vibration. If you can handle a little bit of noise and vibration, we are being told that you should do the tranny and rear diff bushings together. If you do just one type of bushing, you may experience a vibration that might make you
and question this modification's performance value.
Word on www.iwsti.com
is that this is their favorite modification because it indirectly increases power by 5%across the entire RPM range.