Lovgren

I'm on my 2nd tank of fuel on my very new TL. I experience repeatable, acute gas pedal vibe that feels like a "handshake prank buzzer" in my shoe between 1500-2000 RPM. I can downshift to bump RPM to 2800 to make problem go away. This is particularly annoying because it is present during acceleration thru this RPM range, not just while cruising at what some would consider "too low" RPM. It happens in every gear. It is not speed dependent. It is absolutely driveline vibe associated w/ RPM range. Not Lugging. I have driven MT cars for 15 years and I drive them just like everyone else does. This isn't me. None of the other MT cars I drive does this.

Has anyone else felt this specific problem in a 6MT? Has anyone had this problem resolved in a 6MT?

Before you say this has already been addressed in other posts, I don't think so. Others are chasing "ghosts" in 5AT TL's. I have read all the other posts on the subject. I searched "vibration RPM" and read a two-page list of posts, so please no flames. Thanks.

TL-CrAzIe-05

I have an 05 6MT and have not experienced any of the symptoms you describe. I guess I'm lucky. I'd take the car back to the dealer and have them investigate and then re post to this thread so that others can benefit from whatever you learn. Sorry to hear that you are having these problems. Best of luck.

cM3go

known "issue" but nothing has yet been determined on how to remedy this...

nfnsquared

Huh? Not with the 6MT. There's posts about driveline vibrations in the AT versions, but this is the first I've seen for the 6MT

cM3go

well then you must not spend enough time here, I have a 6MT and have the same issue

tlram

Is this issue specific to 04/05 or certain VIN numbers? I have a 05 6MT and havent had this problem.

bwillis

I wouldn't expect anything other than what you are experiencing. Pick a lower gear. Rule of thumb: don't expect anything out of the motor under 2000 RPM, especially with a manual trans. Raise that number for ascending a hill; lower it for descending. (Auto torque converter mitigates the situation.)

SouthernBoy

I don't have that problem at all and am surprised it is felt through the throttle since our throttles are not connected in any way to the engine where vibrations would be transmitted to it from the throttle body. As for climbing hills under 2000 RPM, it depends upon three factors: the degree of the hill's grade, the gear you're in, and how much throttle is being applied.

Yes, take your car back in and definitely have this checked out. Mine's an '04 6MT with around 8700 miles on it and is smooth as silk. Granted, I can feel some slight engine vibration at lower RPMs when under a little bit of a load, but that's to be expected and is normal from a small V6 in this state of tune. But my engine and drivetrain perform excellent with superb throttle response.

kosh2258

I haven't experienced anything like this with my 6MT.

At 1500-2000 rpm you're getting pretty low with the engine RPM and if you place any load on the engine it will start to protest with vibration. Around town, I typically keep the engine in the 2200 to 2500 rpm range for no load cruising, seldom running in higher than 4th gear.

While this engine is pretty refined it isn't a torque monster. Torque is what's needed for smooth low RPM/loaded operations. That's why the typical V8 is good at low RPM pulling.

Keep your rev's a few hundred RPM higher and you'll likely find the problem will go away.

nfnsquared

Where's the other posts about 6MT driveline vibrations?

cM3go

one thread, some users

https://acurazine.com/forums/showthr...ight=driveline

skimmed thread real quick and saw a fellow 6MT user

https://acurazine.com/forums/showpos...4&postcount=23

SouthernBoy

Hey there Kosh.. Merry Christmas to you and yours!

Around town, if I am on level or nearly level road and traveling at or over 40 MPH, I'll go into 5th gear. My 4th gear minimum speed is 30 MPH, also on level or near level road. For 6th gear, I wait until around at the minimum around 53-55 (level road) otherwise it's 60 or above for 6th. I find that these speeds and gear points are fine with my car as long as the driving is smooth and not labored at all. Otherwise, it's the next lower gear.

SouthernBoy

Oh, you're right about the torque issue.. my one real wish for this car. But we need more cubic inches (if it stays normally aspired which I hope it does) to get an sizable increase in torque. Also, with 6-cylinder engines there's more time between the power stroke than with an 8-cylinder engine.. like a 30 degree difference (remember, there are 720 degrees in a 4-stroke engine, not 360 degrees).

That's quite a bit of time and this relates to an increase in vibration.

KilroyR1

Sounds like you may be lugging the engine. I usually run at least 2500 rpm, even with VTEC, this 3.2L motor has less torque than my old 3.0L Maxima V6.

Gear down.

Don

bmduncan

I have this problem in my 05 6MT. However, I still notice it when I downshift to get my revs up. Granted, it's not quite as noticable but I still feel the vibrations through the pedal. At this point, I consider my driveline vibration to be more speed related as other posts have indicated. From my first 500 miles, it appears that when I get caught between 55-65 I feel the vibrations through the throttle, regardless of the gear that I'm in. If I'm going 60 in 6th, I can feel the lugging (assumed to be normal) and the driveline vibration as 2 distinct issues. If I downshift to 5th, the lugging goes away but the driveline vibration remains. Still monitoring the situation before I attempt to deal with service on the issue.

terse

does this whole driveline thing and driving at a higher gear mess up the engine? cause I am new driving stick..and I get the vibrations too...even in first gear..going up slowly on my driveway..

Lovgren

I honestly don't think I'm lugging the engine. I will lug it on my way home today just to make sure. There's still enough power there at 2000 rpm or I would naturally downshift. I'm not trying to get maximum gas mileage or driving in any strange manner. I will take better notes of gear, road speed, rpm, and grade (uphill/downhill) when this happens and post back to this thread. Then those who are curious can exactly replicate in their 6MT and see if they think I'm lugging or if they experience the same problems I do.

Regardless, after my experiments and next post here I'll take it to the dealer for them to fix.

Thanks everyone for your thoughts on this subject.

pilozm

Lovgren,
Does this only happen, when you're starting from a full stop? Is this sensation in your shoe barely noticeable? Is it more prone when starting while steering wheel is turned to one side?
I have a brand new 2005 TL 5AT and I feel a slight vibration on my peddle foot, at very low RPMs, when I am pulling away, specially when turning.

jchcmax

I feel the same vibration between 1500 to 3000 rpms. Doesn't seem right. ????

Vanwall

Same problem 1800 - 2000. I just never drive a steady speed at this RPM range I just choose a different gear. And yes I feel the vibration in the gas pedal. I have an 04 MT with 5.5 K miles.

SMF-TLS

I will be picking up my '05 6MT NAVI next week and I hope I don't have this issue. THe symptoms people here are experiencing sound just like what I have described to the dealer on my '03 TL-S. I have the warranty service record where they tested it out. I reported a vibration through the gas pedal at certain rpms (only while accelerating) and they noticed it too! They replaced the throttle cable, retightened the gas pedal bracket. These minor fixes helped only a little. They also test drove other '03 TL-S' on the lot and ended up calling it a characteristic of the TYPE-S engine. Funny that seems to be the story with the current TL. Hope not in my new car...

OmegaTL

I, too, can re-create this in my 05 TL 6MT with about 1300 miles on it. However, I consciously have to try since I typically don't let the RPMs drop past 2500 (unless coasting). It is slightly noticeable under acceleration below 2000, but nothing I really care about. I think it is just a characteristic of the engine (or "my" engine since some can't recreate this).

If you do (to the original poster or anyone else) take it to the dealer, let us know what they say.