MrJohnTan

For the past month, Ive noticed a THUD or a CLUNK sound coming from the front end. It happens when I reverse out of my driveway while I turn my steering wheel. I also hear it driving forward at slow speeds while turning the wheel, not as loud or noticable as going in reverse though.

claus44

I have the same problem and my mechanic and I both suspect the worn front lca bushings to be causing this. I'll be changing my front lca bushings this thursday and will let you know if that fixes the problem.

/Aerostar\

iTrader: (2)

Motor mounts , plain and simple http://www.mkiv.com/techarticles/fro...ise/index.html

MrJohnTan

i would never have guessed. did you have this same problem?

/Aerostar\

iTrader: (2)

well, i didnt personally, but it looks like that would be the problemo

MrJohnTan

Good find. Thanks for the info. Ill definately look into that.

/Aerostar\

iTrader: (2)

no problem, good luck

sc400

I had a problem similar to that after some suspension works. It turned out that the shop where I had my springs changed didn't tighten the bolts to specs so after the Lexus dealer tightened all bolts I never heard that thud noise again when I backup down the garage and turn the wheel.

MrJohnTan

I installed my suspension myself, so I know everything down there is tight. Ive already taken a look under there to make sure nothing came loose. Thanks for the advice tho.

mikeloc24

Hey John, I've been worried about this for a few weeks now as my car makes this type of noise as well, I thought it was the front lca's at first but now suspect it is the motor mounts because of my mileage (180k). I understand we can get all three mounts from Steve Ganz for about $250. As far as installation I have no clue...

MrJohnTan

The weird thing is I only have 95K on my car I was looking into the TRD motor mounts. I wanted to troubleshoot a little further before I go through all the mounts though.

Here are some prices I got.
TRD Motor and trans mounts
12360-JA800 MOTOR MNT LIST 128.80 EA X 2
12311-46090 RH BRACKET LIST 88.25
12315-46090 LH BRACKET LIST 78.54
12371-JA800 TRANS MOUNT LIST 80.00

mikeloc24

What'd the diff between the TRD's and the OEM Lexus mounts? Is one better than the other for some reason?...

MrJohnTan

TRD are made out of a denser rubber material. They add a better response feel from the clutch and the motor. Basically keeping the engine from twisting and moving resulting in more power to the ground. Bigger improvement in higher HP applications. You will sacrifice some comfort though as you will feel a little more vibration coming from the engine. Not neccessary at all if you are running a stock motor.

mikeloc24

I'm running somewhat stock...for now

ummagawd

iTrader: (1)

you guys can save money on the motor mount brackets if ya guys buy the right supra mounts...

first gen mk4 93-95 mounts are different from 96+ mounts (2nd gen mk4)

the tricky part is I forgot which ones (1st gen or 2nd gen) are a direct bolt on for our cars.