Lexus GX 2004-09 :: GX470 - Clunk On Pressing Accelerator / Transmission Is In Overdrive
May 15, 2012
I have had my 2007 GX for 5 months now. I have discovered the "clunk" issue and had the dealership replace the driveshaft. I want to start a new thread because I have a different clunk. The new driveshaft has fixed my clunk issue at a stop but I have one more. While driving in the city or leaving the highway on the exit ramp (transmission is in overdrive) and I press the accelerator I get a clunk.
This only happens when the transmission is shifting out of overdrive. I can repeat this clunk while driving around 30-40 mph. I will coast a bit then accelerate enough that it wants to shift out of overdrive and then "clunk". It sounds loud but not much of a jerk. I have 85K on it and did not perform any fluid changes in the drive train yet. Transmission is sealed so not sure if it is worth changing or just leave it and drive nice so it don't clunk.
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I need to pinpoint this clunking noise. I've recently noticed this noise on the highway, after I have been driving a while, when I stop and begin driving again, if I am barely pressing he accelerator, she will clunk along. The sound is accompanied by a movement that you can feel as well. I'm beginning to think maybe there is some slippage in the rear differential.
Also I was wondering how much repairs run for this diff, the numbers I got were:
D26W0
and
2148
I know its not the U-joints, I just had them replaced along with a new driveshaft.
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Common issues that arise with GX470. From what I know I will list the first 2 that I know of:
1) Clunk sound from driveshaft
2) dashboard cracking
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I have been reading some mixed reviews here in regards to the "CLUNK". I am referring to that feeling as if hit from behind shortly after coming to a stop. Some are saying it still exists in the 2005 while others are implying that it has been resolved.
Just to be perfectly clear.... Has experienced this "Clunk" in a 2005 GX?
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When I'm on the highway around 60 mph I get a whistling whining vibration sound. if I accelerate or ease off the accelerator it stops, but when I get back to around that speed it comes back. What this could be?
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Getting a clunk feel and sound while pressing the brake pedal? If I press harder, another clunk or two occurs. Felt and hear especially at low speed or stopped. No issues braking, but the clunk has slowly gotten worse since I dropped the car on RSR Downs which could be a coincidence.
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2006 GX470, ~65k mi. When shifting from P to R, P to D, or R to D, the transmission often (but not always) seems to have to think about it a while. When it shifts fine it takes about 1sec for the transmission to change gears. When it's being cranky it takes ~4secs. There are no other symptoms.
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I just purchased a used a Lexus GX470. The transmission seems to do something fairly consistently that seemed unusual to us, but we are new to this car so I'm not sure if it is normal, abnormal, or a sign of something big to come.
When starting from a complete stop, upon removing your foot from the brake, there is a noticeable mini-surge in the engine as the transmission engages, and the sensation seems to repeat when the transmission is disengaging as you brake to stop.
Does this sound normal? From searching on google, I have read that there are issues with "hard shifting" but this does not seem to happen with shifting...just when the transmission engages or disengages, and it isn't a big 'bump' as much as a mini-surge. I have also read where it could be related to something electrical such as the air conditioner.
The car is under warranty, but the service department notes no error codes when they scanned the engine.
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I have had an issue with my GX470 almost since I bought it in 2008. It will sometimes not engage in drive after backing out of a parking space.
It usually happens when it is warm and the car has been driving for awhile then I park for lunch or an errand. I come back start up the car put it into reverse backout of the car space and nothing for a good 5-6 seconds. Seems a lot longer when cars are waiting to take your space and honking.
Anyway I have been reporting it to Lexus at every service and getting a no trouble found. Over time it is occurring more regularly and it even happened at the dealership but of course I was the only one in my car at the time.
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While driving the other day, the truck suddenly began to stall when pressing the accelerator. The water in fuel light came on as did the glow plug light. This continued with the truck sometimes dying all the way and other times just stalling then picking back up. No difference in throttle pressure seemed to make a difference except that letting off totally then slowly pressing seemed to let it keep running sometimes.
So I get home and drain the fuel water separator. I gets about a thimble full of water and lots of the rusty looking junk others have talked about. Try to run the truck again, same thing as before. I then changed fuel filters and thought that had it licked but after about 10 minutes it started again. By the way, the 6mm plug seemed to have about a third of the threads rusted off. Not sure what that means as I drain it at least twice a year.
I have read a lot about the ICP and IPR issues and was wondering if this could be my problem. I am hoping its not the HPOP. My other thought was something in the fuel tank blocking the in tank filter. I checked the top mount bowl and it was only about two thirds full after running the truck
Truck info: Late 2004 Ford F350 Dually 4x4 crewcab, 6.0, EGR delete plate,4" turbo back exhaust with cat delete, no muffler,K&N filter and filter box, Diablo tuner usually set to 60hp upgrade.
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Well this weekend I'm doing quite a bit of work to the truck. My tires and exhaust got delivered last night, now I'm just waiting on the leveling kit. Here's my issue:
For a little while now (5k-ish miles) going in and out of overdrive the tranny makes a clunk noise during the shift. Time to change the tranny fluid and filter? I am making a trip up north on Sunday and don't want to have the tranny the bed on the way.
On saturday I am doing the leveling kit (2"), brakes, exhaust (MBRP), and new tires (325/60r20 Terra Grapplers). Should I go ahead and do the tranny fluid and filter while I'm at it, or just wait till I get back. I am figuring on about 2k miles throughout the trip.
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I get a strange noise when I shit gear & press the accelerator..... the sound is as if something is knocking.....
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Just picked it up on Saturday. 2010 WE, 39,500 miles. Ran great all weekend. This morning, on my way to work, I merge onto the highway, and BAM! Check engine light comes on. Now the car Shakes / vibrates while going 40, or 60-65, and gently pressing on the accelerator.
It shakes at idle, while in Drive, with the brakes on. It seems to have lost power, and the engine sounds like a manual car if you were to try to start from a dead-stop in fifth gear. I've taken it back to the dealership, and they are checking it out. Wondering what the heck happened.
I should also point out that on Saturday, the second I got home, an "Air Bag Error" warning came on, and hasn't gone away.
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My Legacy sedan is not behaving well. On more than one occasion, when pressing on the accelerator, the rpms do not rise. I put it in park and try to press gas pedal, nothing. Turn the car off and let rest for a few minutes, then start it up again, and it's fine.....
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New 2015 Escape. Since I got this car in January I have had this problem where occasionally pressing on the accelerator does nothing for a few seconds and then accelerates like popping the clutch in a stick shift. i.e., I was stopped at a redlight with traffic in front of me. The light went green and the traffic was moving very slow. I depressed the accelerator to match the slow speeds. Traffic began to pick up speed and depressing my accelerator more was doing nothing. I gave it slightly more accelerator and nothing. Then my car jerks forward like I popped the clutch, (my car is auto).
The traffic in from of me then stopped and I had to slam on the brakes to avoid rear-ending the car in front of me. This occurs often but I cannot repeat the event. It happens occasionally and without warning. No faults showing.
I had it back to the dealer right after I bought it. I was told to allow time for the adaptive system to break in. At 2k miles I had it back in and was told, no faults, driving it showed nothing, it must be me. Now at 3500 miles, called Ford and was told to take it back to dealer. I have an appointment next week. This is more than a nuisance as I am very concerned pulling into a parking lot or in the example I wrote about could easily end in an accident with another vehicle or pedestrian, especially children.
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My wife was driving our 2 young kids on the highway and the accelerator was making a loud clacking noise and then there was no response when pressing the accelerator. She managed to get to the shoulder. Mechanic says the engine is totally cooked (long block replacement). Only 32K miles and all scheduled maintenance done.
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V6 A/T ... So to start ball joints, control arms, tire rods are all good as are suspension bushings.
So when driving, if I stop at a light and go to leave theres a slight clunk front the front when first pressing gas or if I am on a hill and pul it in reverse theres often a clunk. Definitely when the cars cold and go from reverse to drive.
Motor mounts?
Torque converter?
There are no shifting issues, tranny works just fine.
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I was driving my 90 Jeep Cherokee (automatic transmission) last night on the freeway when I suddenly lost power. The engine continued to idle (but roughly) but pressing the accelerator did not result in any increase in engine speed or vehicle speed. The car came to a stop on the off-ramp but I was able to restart it and limp along at idle speed for another few blocks until it came to a stop.
I suspected I may have run out of gas, despite the fuel indicator showing a quarter of a tank but after adding 2 gallons of gas to the tank it wouldn't start. It sounded like it wanted to but it wouldn't start.
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After putting my front end back together except new springs, new shocks, and new track bar, just to give everyone a little history of what I've done to it. I've had it for 8 months and maybe put 1000 miles if that because of working out of town a lot and the front end torn apart. I've noticed a louder roar coming from the rear end when taking my foot off the accelerator without pressing the brake. It feels like the tow button is engaged, but isnt. I have no issues with handling besides knowing it still needs alignment. I'm taking it to the dealership tomorrow for a 4 wheel alignment. It sounds and feels like I'm riding on mud terrain tires.
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Do I have to press a button on the ultimate lockpick every time I want to use the navigation while in motion? If I do have to press a button is there any module out there that will allow me to use the navigation while in motion without having to press a button?
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I have a 2005 GX470 and the horn does not work. I have replaced the fuse to no avail. I hear a clicking noise coming from under the dash somewhere when I press on the horn. Where to find the horn relay so I can see if that is the culprit?
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