High speed vibration
#32
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Join Date: Feb 2002
Location: Houston, Texas
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I do agree with you on this and the set up looked nice on the HD.
GM should have left a good thing alone with the two piece set up for the ECabs
#33
TECH Fanatic
iTrader: (14)
my scsb 02 has a bad vib between 70-75 and my CC 06 is above 95 like you guys. One thing in common is both have been lowered. My scsb has a custom built high speed drive shaft from speed eng (I have converted to an 4l80e). I am swaping gears and will be checking pinion angle tomorrow and let you guys know how it goes from there.
#34
well, this has been encouraging. might as well leave the damn speed limiter on. my truck has a 3/5 drop. steel drive shaft, and no pinion shims to my knowledge. i havent experienced any vibration so far. i had a tune planned in the future, but why bother. these trucks seem to turn into money pits when you start modding them.
#35
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Join Date: Feb 2004
Location: Lafayette, Louisiana
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I have the same vibration after 90mph since the day I bought my truck. I've tried everything besides getting the drive shaft balanced. For now, I just don't drive over 90mph, when I have my TrueTrac and 4.10s installed, I'll have the drive shaft balanced then. I will need to get it done before any other mods because I'm at 91mph in the 1/4. I sure wouldn't want to sling a drive shaft at 90+mph. I'm even thinking of installing a drive shaft loop.
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