Vibration at 80-90 only at WOT not crusing, leaf spring bushings??
#1
Vibration at 80-90 only at WOT not crusing, leaf spring bushings??
I am looking into replacing my leaf spring bushings. I am having a vibration around 80-90mph when i am at WOT. If i slowly cruise up to 80-90mph i don't have a vibration. I am thinking that under a heavy load the rear is rotating toooo much and causing the pinion angle to go toooooo positive thus creating a vibration. So i was looking into some Polyurethane bushings to help prevent it.. I will also be adding some caltracs or Assasian Bars in the near future. While i am replacing the bushings i plan on correcting the pinion angle as well.
Any thoughts?
Any thoughts?
#5
TECH Junkie
iTrader: (18)
corey this may help you:
Pinion angle
i had the same issues as you and i went by these guides or steps from rossler and all is well, well was lol i need to redo mine since my angle has changed since i messed with the 4 link recently!
Pinion angle
i had the same issues as you and i went by these guides or steps from rossler and all is well, well was lol i need to redo mine since my angle has changed since i messed with the 4 link recently!
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#8
TECH Senior Member
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Join Date: Oct 2004
Location: Crystal Springs, MS
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mine has always had a vib at 70-75 after the last 4L60E puked the output shaft and bent the center support cross member. i bent it back straight best i could and had to add shims to it to get it smooth at 70, but at 75 its still bad.
WOT it has a slight vib, but its always done that from when it was stock.
what angle finder are you using Corey?
WOT it has a slight vib, but its always done that from when it was stock.
what angle finder are you using Corey?
#9
TECH Senior Member
iTrader: (59)
Belltech makes a carrier bearing relocator kit which you can also use to adjust the pinion angle. It came with my 4" rear drop kit. I did not install it yet, but might have too. My shudders when taking off from a stop then a slight vibration at 15-25 mph. I currently have 2* shims with the fat end back.