Land Cruiser 100 vs. Sequoia

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Y

Yoeddy1

10 Year
Joined
Mar 24, 2012
Threads
10
Messages
61
Hello Everyonel,

I'm new to the forums and I recently sold my 2004 Sequoia. Doing so allowed me an opportunity to purchase my manager's 2004 Series 100 LC. I have wanted one forever. It has 75,000 miles on it and is in perfect condition...still smells new inside!

Anyway, I have a few questions. My Sequoia ran very smooth and low RPM's on the freeway and had an OD button. My LC is smooth as well, but it feels different. I understand this is always 4WD, but it seems to run at higher RPM's when in Drive compared to my Sequoia. Is this normal? Is it due to different gearing?

The only strange thing that I've noticed, is that when I'm running and get to 2800 RPM's, I can feel a slight vibration in the floor boards. My manager put very nice Michelin's on the 18" wheels...bout 1200 bucks when I bought it. At first I thought it might be related to tires, but I did some troubleshooting and realized that at 79 MPH @ 2800 RPM's the vibration occurs or even cruising around town, if I drop it down to 3rd and get the RPM's up to 2800, it will also occur. So it's not a speed issue or tires. The common denominator is 2800 RPM's. If I'm idle and rev the engine to 2800 RPM's it will NOT vibrate, so it's not engine related. Only 2800 RPM's while in motion regardless of gear or speed. Like I said, it runs fine, and I took it to the dealer and had them drive it. They said that I shouldn't worry about it and that I might not be used to the difference in how the Sequoia handles compared to a LC.

Anyway, what do you guys think? Could there be something not tightened down that's creating a vibration at that RPM? Again, it's not major, but it's enough to flair up my OCD.

Any help would be appreciated and I am excited to be out here!

Jason
 
I have an 01' with a very similar vibration in the floorboard at 2600-2800 rpm regardless of mph and/or gear selected. It worsens under load (going up a hill or pulling a trailer) and cranking up the T-bars seems to make it worse as well. I read in a previous thread that a member fixed his vibration changes the CV's but I have not attempted this yet.
BTW, my LC has new michelin at2's and a fresh alignment so the problem most likely lies in the drivetrain.
-Jake
 
I would check motor and transmission mounts, check for loose bolts on A/C, alternator, PS, etc. Fan clutch. The CV's would be speed related not RPM as in each gear are turning a different rate than engine. It could be transmission related as it has components that always rotate at same rate as engine
 
Have you checked your exhaust bearings?
:p just messing with you, congrats on the new 100!! And yes, it sounds like your CV's. My truck was doing exactly the same, and after I replaced my CV's last month, the issue went away completely. Check your boots to make sure they're not ripped or leaking grease also
 
Unless you get the vibration at the same speed (mph) every time it is not CVs or driveline. If it is RPM related it has to be forward of the transfer neutral. I get the occasional vibration in my 2004 but not enough that i've paid attention yet, so this is just a guess but:
1) It could be normal torque converter activity. Odds are you'll get a little vibration right at the point it transitions to lockup. I'm not sure where the LC locks so if someone can look that up it would confirm or eliminate the possibility.
2) Could be abnormal torque converter. I.e. maybe trans needs a fluid change.
3) could be motor or trans mounts. Frankly this would be my bet. Rubber gets old and hard around 75k on every vehicle. Wouldn't surprise me if the mounts are just not damping the normal motor vibration as well as they used to.
Try running the motor at that rpm while stopped, trans in neutral, and see if you feel it. If not then it is probably not a motor balance issue.
If you still feel it the have someone else vary the rpm around that point while you put your hand on the motor (avoiding spinning things) and see if you feel it in the motor. If you feel a different motor vib at that rpm then it's more likely something out of balance. If you don't feel it in the motor but the guy inside does then it's probably motor mounts...the motor may be running normally but the old mounts may be passing through more vib at certain rpm.

Nothing to worry about in any case IMHO
 
Now that you've mentioned it... I just noticed this today as well. A small hint of vibration will come in through the floor board, peaking right about 3000 rpm, irrelevant of gear or speed. It's more pronounced with with load (mashing the gas pedal :D )

This is on my rather minty fresh '06 LX470 with 65k miles...

It coincides somewhat with the motors torque peak. I'd attribute it to high torque output at this relatively low rpm, where you can feel the individual combustion/torque events through the driveline. This combined with the heavy vehicle/driveline.

Non issue IMO. I've never even noticed this quality until you mentioned it.

Enjoy :beer:
 
To answer your gearing questions - be prepared to open your wallet! Yes the gearing is different and more conventional trucks run highway at lower RPM and thus less gas.
 
My LC is rather minty as well, and I think I'm being a bit OCD with it. I'm having my shop take a look at it just to see if anything looks funky. Doesn't happen in nuetral or parked when I rev to that RPM. Only when driving and again...any gear, any speed...only happens around 2800 RPM.

I've never loved a truck so much in all my life. :)

Jason
 
^ Do you notice the vibration intensity changing with load?
 
So if I get more aggressive on the gas or go above 2800 rpms, no, it doesn't worsen. In fact, I think it goes away. It's just that sweet spot rpm.

Jason
 
Probably resonant frequencies in a combination of the engine and the vehicle itself. My parents' 1999 does the same thing, sort of a growl sound at that RPM range regardless of speed, has never gotten any better or worse so we just don't worry about it.
 
Eicca said:
Probably resonant frequencies in a combination of the engine and the vehicle itself. My parents' 1999 does the same thing, sort of a growl sound at that RPM range regardless of speed, has never gotten any better or worse so we just don't worry about it.
Click to expand...
Agreed. With about every single car or truck I've ever known I've always been able to find a small RPM range that created resonant frequency vibrations. Nothing was wrong or worn out...

I'm not saying nothing is wrong with your truck, but it sounds like it may just be a resonant frequency vibration. YMMV.

My LX has it from 2800-3000, my previous '07 Tahoe had it from 3200-3400 rpm. However, my '69 Mustang has it from 2,500-7,000 rpm. :hillbilly:
 
You must log in or register to reply here.

Share this page

Back
Top Bottom