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rear axle bent? whats runout spec

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7.9K views 6 replies 4 participants last post by  bottled2v  
#1 ·
Well after trying to chase down my vibration at high speeds, guy at work told me to check my axles as one might be bent just a small amount. so i threw a dial indicator on both my axles(with the wheels/rotors removed ofcourse) and the first side fluxuated about .004, the second side fluctuated about .012. at that point i thought it might be the bearings so i swapped the axles side to side and the axles kept the same readings they had so it's not the bearings. could that extra .008 be enough to cause a vibration over 95 area?
 
#6 ·
Here is the driveline analysis document from the shop manual.

The axle flange runout spec is 0.005", make sure you press lightly on the center of the hub with an awl or some other tool while turning the axle, to make certain the axle's end play (up to 0.030" is allowable) is not influencing the runout readings.

Also look at the driveline angle section, incorrect pinion angle can cause vibrations at certain speeds...
 
#7 ·
I'll recheck everything soon. I didn't want to throw axles at it until i was sure, and i cant get the ones at my work anymore(figures they just picked them up for core). I did throw new axle bearings in and put that big weight back on the rear, no help. still vibrates over 100 and the rear end makes all sorts of noise now up top. I'm pretty sure whatever is causing the vibration has pretty much ruined all my bearings and what not.