Li Ls4

iTrader: (12)

94 Ls400 with 147xxx miles on it.

noticed it 3 days ago. i noticed that i had low tire pressure in the rear driver side tire. filled it up and drove to school fine, no problem. then on my way back from school i got on the parkway and at 50mph it started vibrating a good amount but nothing crazy, at 65mph the car was vibrating like i had a flat tire, so i pulled over but all tires are fine.

i searched the Ls400 forums and found a thread dated back in early 08 that some1 had vibrations at 1100 rpm in drive but not in park or neutral and 1 of the verdicts was to replace the motor mounts.

do i need new motor mounts?
or could it simply b that 1 of my tires rnt balanced all of a sudden? caz i no that an unbalanced tire will cause vibration at highway speeds

what do u guys think?


ohh and my fan bracket is loose. its making a nice ticking sound so im going to fix that this weekend. any chance this caused or is related to the vibrations?

thanx guys/gals

LiCelsior

iTrader: (32)

check to see if your tires are balanced. remove that wheel that was low on air and do a soap test...and see if theres any bubbles. check for bends too.

ls400boi

I guess it could be the engine mounts putting too much pressure on the transmission mounts which would be throwing the driveline position off. But my 1990 LS once had a bad vibration that got worse at higher speeds and it turned out to be the engine/tranny mount.

LiCelsior

iTrader: (32)

well after talking to him...he does have some bends in his wheels so hes gonna check those out...i have to see if mine have any bends...already hit some unsuspecting hard hits.

trukn1

Check all the mounts as well as check the lower ball joints. We all know that the LS, especially the first gen, is notorious for eating these up.