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PooheyThomo
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14 Posts
Discussion Starter #1
HI, ive got an xf falcon with a 351 and t5,
and i put in a 3.9 lsd diff, and ever since then everytime i go over 80km it starts to vibrate and anything over 80 is undrivable.. highway driving, forget it.
also my speedo is way out (which i knew would happen) whats the trick to getting that right again? is it a matter of changing gears or much more involved?

Thanks Niall
 

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Registered
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309 Posts
sounds like you need to balance everything, including drive shaft, apparently it can go out of *wack* and cause this vibration you talk about
 

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Birth, Drift, Death...
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3,039 Posts
try putting the tailshaft in in different positions - if you have a 'flange' type mounting there should be 4 choices, of its a yoke type you have 2 positions.

change it and see if its any better, and also of course make sure its seated peoperly, if its off-centre it will be horrendously out of balance.
 
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