Bad Vibration above 65 mph - u-joint?

[chengny]

Interesting - so maybe it is the front driveshaft spinning even though everything is unlocked

Commonly caused by overpacking the front hubs. The grease actually acts as viscous coupling and will drive the axles, differential and front drive shaft. No real harm - maybe a minute loss of fuel economy due to the added load of spinning the axles/drive shaft.

 

[89Suburban]

would be my guess

HAHHAHHAH I'm gonna get a good load on tonight and come in here and make a peace of mind post like that lol!!


Posted From Hell

 

[Tyger13us]

would be my guess

What? ya have never desert raced in 4wheel high @ over 100mph before?

me and a couple dudes i know make desert runs and one time the dude didnt put on his seat belt when we hit an OH **** bump and he landed in my lap while i was trying to keep it straight and not wreak the truck.......

the other point was that if a front driveline is done right,, it wont take out your oil pan,, and i have seen that happen many times by not having the driveline done right.........