06 Manual XB STOCK no modifications

I've posted about this problem before though the dealer only tells me this is normal. Of course I've taken it to another dealer who says the same thing.

7 friends with the SAME EXACT year and drivetrain have driven my car and say this is not normal at all, even some SL members.

Please post yes or no so I can take this to the dealer

My clutch pedal vibrates especially between 2500 and 3000 rpm(especially around 35mph 3rd gear) (it is felt by lightly touching the pedal with my left foot) then my gas pedal vibrates at 3500 rpm or more in every gear. If I shift after 3500 I feel the vibration thru the clutch pedal when depressing it to shift gears. It's odd though sometimes, If I stay at 80mph or above long enough it seems to go away, sometimes?

 

Thanks for the votes!

anyone have any comments on what this problem might be.

ive been told clutch, misaligned flywheel, injectors, bad ecu, etc

 

You do not have a problem. You are focusing so hard on something that is not problematic that you have convinced yourself there is a problem.

 

hey thanks for the suggestion, i'll give that to everyone else who has driven my car and said it does not feel normal

 

uhhh im not sure how you would feel vibrations through your gas pedal.....as for clutch pedal i would prolly say a misaligned clutch/flywheel. i dont think injectors or a bad ecu would have anything to do with your pedals vibrating.....but thats just my guess

 

thanks itsme

the vibration thru the gas pedal is just that, vibration. When I press down on the gas pedal it's not smooth at all like everyone elses. Its a rough vibrating feel, especially through those rpms.

so should I focus on the mechanical aspect or electical?

 

Only way to isolate the electrical vs mechanical is to go down a steep hill in a low gear to get the rpm up to the vibration and back off the gas. If it still vibrates then it is mechanical. If it does it in any gear at the same RPM then it is the engine or clutch out of balance. Now the next questions would be your gas mileage and color of your oil. What happens when it vibrates and you give it a little gas and then back off the gas so that you load the engine mounts in different directions.

 

Just read a post in Edmunds about xB problems and someone had a balance shaft fail in the engine - that could also make it vibrate so check your oil on the dip stick and see if it has metal flakes in it or is very dirty.

 

Thanks Jan06xb, your awesome for helping

I'll check on the balance shaft, though I thought our cars dont have balance shafts?

to answer to your question, when it vibrates and I give it gas and then back off, IT Vibrates more.

and it vibrates at any gear at around the same rpm

 

Ok that sounds like a broken clutch plate - next thing to try is while stopped to hold the clutch in and rev it to the rpm that vibrates. This will isolate the clutch disk that rides on the input shaft of the transmission from the bell housing containing the clutch spring and pressure plates. If it doesn't vibrate when the clutch pedal is pressed and you are not moving then you have a damaged clutch plate. If it still vibrates you could have a bad clutch housing or problem with the flywheel or it could be the engine. You may want to check for leaking tranny oil around the tranmission engine seam in case the input shaft to the tranny is being damaged by the clutch and the input seal is leaking. Also if you have trouble with some grinding when putting it in gear even with the clutch pedal all the way to the floor then that would indicate a clutch problem also. If you can make a video and post it on line of the engine running so we can see it shaking and what noise it is making it may also help. I am not absolutely sure about the balance shaft but I have heard that there is one and it would help to make the engine run smoother. Ok looking at a sticky in the tech section apparently the 2.2Liter engine has a gear driven balance shaft and the 1.5L engine does not.

 

No balance shaft in the 1NZ-FE engine. It just uses the pulley as a harmonic balancer.

 

Hey Jan06 xb

Your are an Awesome help.

I've had this problem since the beggining and up until your response have never received much help.

and yes when I depress the clutch and rev to that rpm, there is no vibration so I will ask the toyota tech to look into the clutch plate. If your right then you apparently are btter learned than a toyota tech

vintage 42, Ive always recevie responses from you so thanks, about the balance shafts, you are right there are none, though there is something else to balance the harmonics right?

 

The smaller displacement engines like out xB don't need the balance shaft as much as a larger 4 engine.

Ok sounds like either a blown clutch disk or maybe the pilot bearing in the flywheel that keeps the tip of the tranny input shaft centered in the flywheel along with the clutch plate centered in the pressure plates. There still could be an engine mount problem too.

 

I was wrong

when you press the gas pedal by itself to that rpm everything is ok

though if you press the clutch in and hold, then press down on the gas pedal to that rpm (or even before that rpm), its vibrates quite a bit !

so I think it's narrowed it down to the clutch area? right???

 

Yeah sounds like it either way - you can sometimes get the thing balanced when your foot is off the clutch - either way something is not right there. There usually is an access port hole in the bell housing to examine the clutch where the service guys can look inside pretty easily - SL used to have the manuals on line to check that but not any more so I am not sure where it might be.