[LCML] Need help with a FJ80 head sctratcher!

[Mark E Whatley]

Landcruiser Specialties wrote:
> After you install the new u-joints, you need to have the drivelines 
> timed & balanced. If they are out of time (yokes not lined up 
> correctly) and unbalanced, you will have premature u-joint, pinion 
> bearings and/or t/case bearing wear.
>

 Timing (or phasing) is no more than putting the two ends of the shaft 
back together correctly. Not anything that you need to "have done". And 
new ujoints do not affect the balance of the shaft. They can in some of 
the POS chevys of the '9s (and maybe still) which had the ujoints GLUED 
in place. But in a Criuser, replacing joints does not affect 
straightness or balance of the shaft.

I also noticed comments about replacing your fasteners first to see if 
that it the problem... If the bolts are tight, then they are tight and 
they will not affect balance or cause vibration. If they are damaged, 
replace them, but do not expect to address any vibrations problems by 
doing so.