Nasty high freq. vibration after 4.10 install
#12
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Driveshaft for sure! Hope you have better luck with your aluminum unit than I did with my steel one. Finally had to get a heavier gauge bigger diameter one made that was high speed balanced. The factory one came out at about 90 after the 4.10's and did $1700 worth of damage! Don't run it very fast until youve gotten it balanced.
#13
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Thanks for the heads up fast...that's my sweet spot. Around 90 its at it's worst. Im thinking im gna have to change to a steel shaft. Cant find anyone in town that can balance AND weld an alum shaft... WTF?
#14
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Update: None of the "drive train/drive shaft" shops here in Odessa could do a balance over 2,000RPM much less do any kind of Alum welding. Sending it to Drive Shafts Unlimited in San Antonio. Hopefully this will fix the problem.
#18
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More than likely, that truck had 3.73s stock. There is no reason why that shaft shouldn't be able to handle 4.10s at 85mph. I have seen people drop the shafts when taking them out, and put a kink in the tubing. I've also seen the yokes damaged by improperly changing the u joints.
#19
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This truck has the gu5 code in the glove box. So according iamkeniff that's 3.23's... I would say that's a fairly significant jump in gear ratio. Had the drive shaft supported by a jack stand when we did the gear swap...stock u-joints. I'm gna have Nelson's Performance in San Antonio build me a drive shaft we I get the extra $$. Until then, just gna have it high speed balanced. Also got Corevette Servo on the way. Anybody have some good advice on best tranny for a future swap?
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