Kansas

Look at Rome's very first post in this thread which said: "I'm getting vibration right at 50mph and then goes away...then at 80 mph does it again"

McPierson

iTrader: (3)

I just want to point this out again. My mount WAS bad and showed no visual signs.

The vibration is more of a noise like someone has a bad *** system and it's hitting the lowest note. I don't remember really feeling it.

A bad tire has more of a shake to it, and you don't hear that (it's too low). You hear the things that are ratteling.

I couldn't tell you what other people have experienced or if their mount is bad, but it was pretty obvious to me, although I knew there was a possibility that I was throwing parts at the problem.

deanshark

Actually, the tires on the LS are VERY sensitive to balance, and they do give off a vibration when they're a tiny, tiny, bit off.
Although, if I was chasing a vibration, (at whatever speed, 0-100) I would take a chance at the tranny mount first, it's the cheapest fix. You can find them for around $35 and they are known to go bad.

anarchyx34

I used ramps to raise the car, and a jack with a block of wood under the transmission pan (near the edge, not the center) to support the trans. I had an impact gun so that definitely cut some time. It took me about 15 minutes total. Very easy. If you have 2 jackstands (which you should be using anyway if you're working under the car) you can just put the car up on the stands and then use the jack for the transmission.

rome99LS

Ok my neighbor has ramps ill see if i can use his. That's not bad, but I don't have an impact it will he by hand with regular ratchet sockets, so hopefully it doesnt take long for me todo it.
Then ill go back to the tires.

idriveals4

You shouldn't need a impact. Hand tools was all I used. It really was easy and straight forward.

deanshark

Actually you really only need one jack and one jack stand, if that's all you can get your hands on. You only need to raise one side of the car, put the stand there and use the jack to raise/hold the tranny (use a piece of wood on the jack) while you take out the crossmember. It's a very easy, and cheap, job to do. Half hour tops, even if ya never worked on a vehicle. You probably seen the tutorial already to replace the tranny and motor mounts but if not here it is, tranny mount is post #2; https://www.clublexus.com/forums/ls4...placement.html

rome99LS

Thanks for all you guys help...ill let yall now as soon as I get the tranny mounts and hope it will make a difference!!!

ThisIsIt20

I ran across this thread by accident and since I am having (had) the same issue, I took my time and read through the thread.

I just went ahead and had the tranny mount replaced on Tuesday of last week and it fixed my problem.

The old tranny mount didn't look like it was bad while under the car, but once removed, you can clearly tell that it had completely collapsed.

Thumbs up to this thread.

carguychar

Problem solved !!!!!!

changed motor mounts and tranny mount, all were in bad shape ! 114K miles on the car, took 2 1/2 hrs to do working over a pit, only way to go !!!
what a differnce !! drives like a new car,

still have a little noise when I drive over a sharp curb

thanks for the input ,

rome99LS

Damn I see a lot of people had the same problem I have. I'm convinced, I will definitly do the tranny mounts first.

rome99LS

Could I buy the mounts from Oriellys or a reogular parts store?

PureDrifter

iTrader: (10)

when the OEM part is only like $30-40, why would you?

MrFuel

iTrader: (3)

I don't have a rumble or any sound. But mine the shifter will shake while im driving. I'm guessing that's the sign my transmission mount is bad????

rome99LS

Oh ok cool. Dealer also sells it for that price as well?