IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Clunk feeling upon acceleration

Thread Tools
 
Search this Thread
 
Old Aug 12, 2013 | 09:03 PM
  #1  
JLex23's Avatar
JLex23
Thread Starter
Rookie
 
Joined: Aug 2013
Posts: 69
Likes: 4
From: IA
Default Clunk feeling upon acceleration

Anyone experience a slight clunk feeling from dead stop under more aggressive acceleration...my 14 250 AWD has done this on 3 or 4 occasions. Just wondered if anyone else has felt it.
Reply
Old Aug 12, 2013 | 09:26 PM
  #2  
JLex23's Avatar
JLex23
Thread Starter
Rookie
 
Joined: Aug 2013
Posts: 69
Likes: 4
From: IA
Default

Also it seems to occur only when accelerating from stop into turns.
Reply
Old Aug 13, 2013 | 02:04 AM
  #3  
UpSideDown's Avatar
UpSideDown
Lead Lap
 
Joined: Jul 2009
Posts: 608
Likes: 1
From: SE
Default

Turn off the traction control and try it again.
Reply
Old Aug 13, 2013 | 02:53 AM
  #4  
spwolf's Avatar
spwolf
Lexus Fanatic
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2005
Posts: 20,225
Likes: 266
Default

Originally Posted by UpSideDown
Turn off the traction control and try it again.
better not most likely :-)
Reply
Old Aug 13, 2013 | 09:00 AM
  #5  
flippd's Avatar
flippd
Driver
 
Joined: Aug 2013
Posts: 169
Likes: 0
From: PNW
Default

You sure there isn't anything in the trunk that's not tied down?
Reply
Old Aug 13, 2013 | 09:10 AM
  #6  
JLex23's Avatar
JLex23
Thread Starter
Rookie
 
Joined: Aug 2013
Posts: 69
Likes: 4
From: IA
Default

Originally Posted by flippd
You sure there isn't anything in the trunk that's not tied down?
That's originally what I thought it was...but everything I had in my trunk was in the exact position I put it in when I left, so it's not that...but that's the sensation you get when it happens
Reply
Old Aug 13, 2013 | 11:45 AM
  #7  
corradoMR2's Avatar
corradoMR2
The pursuit of F
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jul 2006
Posts: 8,296
Likes: 303
From: Toronto, Canada
Default

Originally Posted by JLex23
That's originally what I thought it was...but everything I had in my trunk was in the exact position I put it in when I left, so it's not that...but that's the sensation you get when it happens
Did you double-check the jack and tire replacement equipment is tight (or just remove it for testing)? Have you tried to reproduce it from a rolling start instead of a dead stop?

I'll be getting mine in two weeks so can't comment/confirm just yet but I never had this noise with my '08 250 AWD.
Reply
Old Aug 13, 2013 | 11:52 AM
  #8  
JLex23's Avatar
JLex23
Thread Starter
Rookie
 
Joined: Aug 2013
Posts: 69
Likes: 4
From: IA
Default

Originally Posted by corradoMR2
Did you double-check the jack and tire replacement equipment is tight (or just remove it for testing)? Have you tried to reproduce it from a rolling start instead of a dead stop?

I'll be getting mine in two weeks so can't comment/confirm just yet but I never had this noise with my '08 250 AWD.
Haven't checked jack or spare. It's only happened a few times in the 500 miles I've put on the car. I might check the spare to see if its loose.
Reply
ClubLexus Stories

Celebrating Lexus & Toyota from Around the Globe

story-0

10 Lexus Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-1

8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

 Michael S. Palmer
story-2

10 Best Lexus Models No One Remembers

 Joe Kucinski
story-3

TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

 Michael S. Palmer
story-4

Top 10 Lexus & Toyotas to Drive Before You Die!

 Joe Kucinski
story-5

Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

 Joe Kucinski
story-6

Lexus LC500 Convertible Auction: A Preview of Rising Values?

 Brett Foote
story-7

GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

 Michael S. Palmer
story-8

9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

 Joe Kucinski
story-9

2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

 Brett Foote
Old Aug 13, 2013 | 12:00 PM
  #9  
JLex23's Avatar
JLex23
Thread Starter
Rookie
 
Joined: Aug 2013
Posts: 69
Likes: 4
From: IA
Default

Just checked both and everything is snug.
Reply
Old Aug 21, 2013 | 01:55 PM
  #10  
JLex23's Avatar
JLex23
Thread Starter
Rookie
 
Joined: Aug 2013
Posts: 69
Likes: 4
From: IA
Default

Well guys gotta take the IS in tomorrow for the clunk or thump when accelerating hard from a stop on what only appears to be left turns. Sucks since this car has less than 600 miles but I don't think it's normal behavior. Thought it was my spare since nothing is in the trunk but I can clearly feel it under the car and my spare is tight.

Some have said it may be the trac control kicking in but it's not a loss of power, but rather mechanical in nature. Hope my car does not need major repairs already...tearing apart a new ride, while under warranty still makes me sick. I'll keep you all posted...anyone else experience anything similar??
Reply
Old Aug 21, 2013 | 03:02 PM
  #11  
corradoMR2's Avatar
corradoMR2
The pursuit of F
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jul 2006
Posts: 8,296
Likes: 303
From: Toronto, Canada
Default

Originally Posted by JLex23
Well guys gotta take the IS in tomorrow for the clunk or thump when accelerating hard from a stop on what only appears to be left turns. Sucks since this car has less than 600 miles but I don't think it's normal behavior. Thought it was my spare since nothing is in the trunk but I can clearly feel it under the car and my spare is tight.

Some have said it may be the trac control kicking in but it's not a loss of power, but rather mechanical in nature. Hope my car does not need major repairs already...tearing apart a new ride, while under warranty still makes me sick. I'll keep you all posted...anyone else experience anything similar??
This might be a stretch, but could be something with the hand (foot) brake? Another poster talked about a clunk and it turns out it's the parking brake cable as it was a similar issue with the 2IS. The fix seems to be that you need to use the foot brake a couple times when parked and release it, then noise is gone. It's one of the first things I'll be doing tomorrow before I drive off from the dealer lot when I get my car. Give it a shot, you never know...
Reply
Old Aug 21, 2013 | 03:09 PM
  #12  
JLex23's Avatar
JLex23
Thread Starter
Rookie
 
Joined: Aug 2013
Posts: 69
Likes: 4
From: IA
Default

I am definitely going to try this but it likely won't rectify the issue before tomorrow morning, so I'll test it out when I get the car back. Car drives beautifully aside from clunk feeling and noise and it does not do it under light acceleration, so I'm hoping its an easy fix. The fact that no one else has experienced this makes me a little nervous. Saying my prayers tonight it isn't a drive shaft or transmission issue.
Reply
Old Aug 21, 2013 | 03:22 PM
  #13  
spwolf's Avatar
spwolf
Lexus Fanatic
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2005
Posts: 20,225
Likes: 266
Default

Originally Posted by JLex23
Well guys gotta take the IS in tomorrow for the clunk or thump when accelerating hard from a stop on what only appears to be left turns. Sucks since this car has less than 600 miles but I don't think it's normal behavior. Thought it was my spare since nothing is in the trunk but I can clearly feel it under the car and my spare is tight.

Some have said it may be the trac control kicking in but it's not a loss of power, but rather mechanical in nature. Hope my car does not need major repairs already...tearing apart a new ride, while under warranty still makes me sick. I'll keep you all posted...anyone else experience anything similar??
VSC works by applying brakes... you will hear clunk when brakes are activated.

since you are saying you are only hearing when accelerating hard in corners, then i would guess it is it... otherwise things that happen during hard acceleration would also happen when you brake (something loose).
Reply
Old Aug 21, 2013 | 03:26 PM
  #14  
corradoMR2's Avatar
corradoMR2
The pursuit of F
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jul 2006
Posts: 8,296
Likes: 303
From: Toronto, Canada
Default

Originally Posted by JLex23
I am definitely going to try this but it likely won't rectify the issue before tomorrow morning, so I'll test it out when I get the car back. Car drives beautifully aside from clunk feeling and noise and it does not do it under light acceleration, so I'm hoping its an easy fix. The fact that no one else has experienced this makes me a little nervous. Saying my prayers tonight it isn't a drive shaft or transmission issue.

Odds are very much in your favor (thousands to one) it's not a major mechanical issue. Regardless, if the foot brake trick doesn't do it or it's not the VSC kicking in as Spywolf suggests, relax, Lexus will take care of you and the car!
Reply
Old Aug 21, 2013 | 03:37 PM
  #15  
JLex23's Avatar
JLex23
Thread Starter
Rookie
 
Joined: Aug 2013
Posts: 69
Likes: 4
From: IA
Default

Valid points for sure guys!!! I'll keep you posted for sure after I hear back tomorrow. My dealership is great so I expect that they will make sure everything is legit.
Reply



All times are GMT -7. The time now is 02:59 AM.

story-0
10 Lexus Designs That Have Aged Like Fine Wine

Slideshow: Some luxury cars chase trends, but these Lexus models look better now than they did when they first rolled into showrooms.

By Verdad Gallardo | 2026-05-06 17:58:29


VIEW MORE
story-1
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Slideshow: How to Get the Best Fuel Economy with a Hybrid and Plug-In Hybrid!

By Michael S. Palmer | 2026-05-05 20:54:44


VIEW MORE
story-2
10 Best Lexus Models No One Remembers

Slideshow: 10 best Lexus models no one remembers.

By Joe Kucinski | 2026-05-05 17:33:28


VIEW MORE
story-3
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Slideshow: diving into 4Runner TRD Off-Road Premium's pricing, performance, fuel economy, features, and amenities!

By Michael S. Palmer | 2026-04-23 13:09:18


VIEW MORE
story-4
Top 10 Lexus & Toyotas to Drive Before You Die!

Slideshow: the 10 Lexus and Toyota vehicles you need to drive before you die.

By Joe Kucinski | 2026-04-23 10:34:24


VIEW MORE
story-5
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Slideshow: Top 10 Lexus/Toyota models with the lowest 5-year depreciation rate.

By Joe Kucinski | 2026-04-08 12:19:06


VIEW MORE
story-6
Lexus LC500 Convertible Auction: A Preview of Rising Values?

The LC hasn't even disappeared from the Lexus lineup yet, and we're already seeing signs of an explosive market.

By Brett Foote | 2026-04-06 09:25:02


VIEW MORE
story-7
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Slideshow: comparing the pricings, specs, power, fuel economy, fun-factor, and features of the GX 550 Luxury+ and TX 550h+ Luxury.

By Michael S. Palmer | 2026-03-19 13:44:11


VIEW MORE
story-8
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Slideshow: 9 best Lexus models you can buy for half price and 1 you should avoid

By Joe Kucinski | 2026-03-19 12:01:07


VIEW MORE
story-9
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Here's everything you need to know about the latest NX.

By Brett Foote | 2026-03-19 11:56:59


VIEW MORE