Go Back   Club Lexus Forums > Lexus Model Forums > SC Models > SC 400/300 > Performance & Maintenance
Sign in using an external account
Register Forgot Password?

SC300 Vibrating heavily!

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 05-14-14, 11:37 PM   #1
MORPM
Driver School Candidate
Trader Score: (0)
 
MORPM's Avatar
 
Join Date: May 2014
Location: Arizona
Posts: 9
Unhappy SC300 Vibrating heavily!

Hello Lexus komrades, I currently own a 92' SC300, recently it started vibrating heavily when I would hit about 45mph+ and when letting off the pedal then going below 45 it drives normal no vibration... Yes I got the tires new, balanced and rotated them ✔ Some mechanics were also saying it was a driveshaft issue so I switched it out from another salvaged SC300 ✔ and I replaced the coupler flex on it as well (new) ✔ and finally I got a very good condition Rear subframe from a 98' and installed it and well it still vibrate but not as bad before... Any help I'd appreciate ! If Mods can put this in the correct category please I'm a Newbie to the forum.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
MORPM is offline   Reply With Quote
Old 05-15-14, 12:34 AM   #2
scENFORCER
Lexus Champion
Trader Score: (0)
 
Join Date: Oct 2006
Location: Vancouver, BC
Posts: 2,902
Default

Engine mount or tranny mount?
I hope this isint the first time you've posted here about this problem. Seems like with all the combined knowledge here on CL it would have been fixed a long time ago rather than going through all the expensive fixes you've tried.
scENFORCER is offline   Reply With Quote
Old 05-15-14, 10:17 AM   #3
pur4orm
Rookie
Trader Score: (0)
 
Join Date: Mar 2014
Location: ny
Posts: 52
leftfadead
Default Been there before.

Your tyranny is going. Hard to find good mechanics these days. Look at it this way....you have a car with age, no longer in production. Prepare to replace EVERYTHING. Sometimes it's costly but so is maintenance on a new car. Replace the tyranny n and you should be ok.

Last edited by pur4orm; 05-15-14 at 10:19 AM.. Reason: misspelled word
pur4orm is offline   Reply With Quote
Old 05-15-14, 11:54 AM   #4
1CleanSC
Driver
Trader Score: (0)
 
1CleanSC's Avatar
 
Join Date: Jul 2012
Location: Kentucky
Posts: 105
Default

I sense a 5 speed swap in your future.
1CleanSC is offline   Reply With Quote
Old 05-15-14, 04:49 PM   #5
Luxor
Lexus Champion
Trader Score: (12)
 
Luxor's Avatar
 
Join Date: Jan 2006
Location: Arizona
Posts: 2,108
Default

It's NOT a tranny issue.
__________________
Keepin' It Clean!
Designed by Toyota in California * Assembled in Japan
Luxor is offline   Reply With Quote
Old 05-15-14, 08:56 PM   #6
mikef
Lead Lap
Trader Score: (3)
 
mikef's Avatar
 
Join Date: Jun 2013
Location: CO
Posts: 417
Send a message via AIM to mikef
Default

just do a 2jzgte swap next, see if that helps lol
mikef is offline   Reply With Quote
Old 05-15-14, 10:42 PM   #7
Sylexus
Driver
Trader Score: (1)
 
Join Date: Nov 2012
Location: Texas
Posts: 114
Default

Mine did this as well, it suddenly stopped so I never got around to seeing the cause.
Sylexus is offline   Reply With Quote
Old 05-15-14, 11:29 PM   #8
perkins92
Driver School Candidate
Trader Score: (0)
 
Join Date: Jul 2010
Location: kentucky
Posts: 4
Default

My 97 sc400 did this as well. It turned out to be both of the rubber engine mounts had ripped in half. Although, I also had my 93 sc300 to have a similar problem back in the day. The front driveshaft had somehow got unbalanced and caused vibrations at certain speeds, but if you have replaced yours with one that you know for a fact to be good then you shouldnt have any problem there.
perkins92 is offline   Reply With Quote
Old 05-16-14, 02:08 AM   #9
MORPM
Driver School Candidate
Trader Score: (0)
 
MORPM's Avatar
 
Join Date: May 2014
Location: Arizona
Posts: 9
Default

Quote:
Originally Posted by pur4orm View Post
Your tyranny is going. Hard to find good mechanics these days. Look at it this way....you have a car with age, no longer in production. Prepare to replace EVERYTHING. Sometimes it's costly but so is maintenance on a new car. Replace the tyranny n and you should be ok.
I highly doubt it's tranny.. I've already been thru that as well lol usually I can feel the gears slippin' even if
MORPM is offline   Reply With Quote
Old 05-16-14, 02:13 AM   #10
MORPM
Driver School Candidate
Trader Score: (0)
 
MORPM's Avatar
 
Join Date: May 2014
Location: Arizona
Posts: 9
Default

Quote:
Originally Posted by Sylexus View Post
Mine did this as well, it suddenly stopped so I never got around to seeing the cause.
It's like a very "fixed" vibration.. I feel like its with the bushings and mounts somewhere...
MORPM is offline   Reply With Quote
Old 05-16-14, 02:18 AM   #11
MORPM
Driver School Candidate
Trader Score: (0)
 
MORPM's Avatar
 
Join Date: May 2014
Location: Arizona
Posts: 9
Default

Quote:
Originally Posted by perkins92 View Post
My 97 sc400 did this as well. It turned out to be both of the rubber engine mounts had ripped in half. Although, I also had my 93 sc300 to have a similar problem back in the day. The front driveshaft had somehow got unbalanced and caused vibrations at certain speeds, but if you have replaced yours with one that you know for a fact to be good then you shouldnt have any problem there.
Exactly! Even the coupler flex. I remember doing an engine mount replacement as well 1 1/2year ago, Il check those again maybe the heat is eating away at the rubber.
MORPM is offline   Reply With Quote
Old 05-16-14, 02:24 AM   #12
MORPM
Driver School Candidate
Trader Score: (0)
 
MORPM's Avatar
 
Join Date: May 2014
Location: Arizona
Posts: 9
Default

Quote:
Originally Posted by mikef View Post
just do a 2jzgte swap next, see if that helps lol
Any spare parts bud lol
MORPM is offline   Reply With Quote
Old 05-16-14, 03:16 AM   #13
AnonymousG
Pole Position
Trader Score: (2)
 
Join Date: Jan 2011
Location: Bay Area, CA
Posts: 301
Default

Quote:
Originally Posted by MORPM View Post
Exactly! Even the coupler flex. I remember doing an engine mount replacement as well 1 1/2year ago, Il check those again maybe the heat is eating away at the rubber.
Did you do both mounts? Did you also do the transmission mount?
__________________
92 SC300 5spd conversion - Royal Jade Pearl

YellowSpeed Coils - 96 Front - 97+Tails - LED Interior - HID Lows, Fogs, Reverse - SC4 Front Lip - Injen SRI - MKIV DualCore Rad - External Transmission Cooler - NRG/Nardi - BattleVersion subframe bushings - Poly rear dif bushings - BattleVersion modded knuckles - Braided power steering hose - Front & rear Prothane bushings - MKIV swaybars - BattleVersion front swaybar links - S2000 black seats - Kazama engine mounts
AnonymousG is offline   Reply With Quote
Old 05-20-14, 10:25 PM   #14
MORPM
Driver School Candidate
Trader Score: (0)
 
MORPM's Avatar
 
Join Date: May 2014
Location: Arizona
Posts: 9
Default

Alrighty so it seems that there's an issue with the differential bushings.. What's your advice guys should I go ahead and sell it or is there another possibility? I've already went thru 3 things to try knocking out the issue... it's like having a crazy psychotic gf lol
MORPM is offline   Reply With Quote
Old 05-20-14, 11:36 PM   #15
scENFORCER
Lexus Champion
Trader Score: (0)
 
Join Date: Oct 2006
Location: Vancouver, BC
Posts: 2,902
Default

Diff bushings arent very expensive. Why make that cause you sell it?
I still think its you're tranny mount. When I replaced mine it got rid of a lot of vibrations, some of which were very similar symptoms to yours.
__________________
scENFORCER - 1999 SC400

LSD / PPE / Tanabe / Carbing / BFI / Megan / TMS / Dazien / Volk
scENFORCER is offline   Reply With Quote
Old 05-20-14, 11:36 PM
 
 
 
 
Reply

Tags
300, 96, bushings, causing, coupler, flex, park, rattiling, sc, sc300, shifter, vibration

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Vibration when braking wdwilson10 Suspension and Brakes 20 09-24-14 05:47 AM
Strange Vibration andyes300 ES300 and ES330 5 05-09-14 08:03 PM
92 SC300 Wheel Bearing / R. Differential Advice lexus72 SC 400/300 0 05-05-14 11:22 AM
Changed Transmission now I have slight vibration 2jzgttegs GS - Second Generation 24 02-18-13 06:36 AM
My audio set up almost done CLUB300 IS - Second Generation 6 09-14-12 09:06 AM

All times are GMT -7. The time now is 07:11 AM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info