Shaking on Acceleration

Hello!

I have a 2007 Toyota Tacoma PreRunner (I think) TRD Sport V6 SO5. IT shakes really bad on acceleration from a stop up to about 20mph. Then it's smooth, but I can still hear a bit of a rattle, and it doesn't seem to want to go above 70mph. It feels like maybe it's not switching gears properly, or maybe something is loose and catching when I accelerate. I was hoping to see if anyone on here had had a similar problem or maybe knows what the problem is before I take it to a mechanic.

Thanks!

(If I posted this in the wrong forum, or if there is a better forum where I would probably get an answer, please let me know!)

 

Note: I checked out the u-Joint because everywhere I looked online seemed to say that would be the problem. As far as I could tell, it's working fine. It isn't loose. All the rubber pieces are there. It is very dusty, but other than that, seems to be in working order.

 

Its axle wrap. All the 2nd gen tacomas had it. If you search arount there are tons of threads on this exact thing. Most solutions come from either new leaf packs, an add a leaf, carrier bearing adjustment, traction bars, or one piece axle swap.

Each of those options vary in price heavily and carry some sort of benifit or drawback.

 

Lets look at some Vibration diagnostics . Anytime someone asks a vibration question , I copy and paste this .
I believe there are at very minimum at least 12 different vibration issues assosiated with the Tacoma and all the vibrations / shudders get mixed into the same pot when members start posting leaving members scratching their heads .

These are some diagnostics to try . If you bring your truck to a shop , they will be trying most of these to narrow your vibration down .
Have you greased your driveline ?http://www.tacomaworld.com/forum/tec...rks-total.html
Do you know how to grease your driveline properly http://aftermarket.federalmogul.com/...%20FAQ%27s.pdf
Have you slid under the truck and inspected to see if any driveshaft weights have fallen off ?
Have you checked your carrier bearing https://www.tacomaworld.com/threads/how-to-replacing-carrier-bearing.260283/
Does the truck vibrate in park or neutral and does the vibration change with accelerator pedal ? This is a misfire test for your engine
Does the truck vibrate while holding the brakes and hitting the gas - Automatic ? This is also a misfire test for your engine under load
Does the truck vibrate in neutral at a stand still ?or coasting in neutral ?
Does the truck vibrate in 4x4 ?
Does the truck " Only vibrate " from 1st to 2nd gear ? https://www.tacomaworld.com/threads/vibration-when-accelerating-from-stop-anyone-fixed-it.300155/
Does the truck only vibrate in 2 wheel drive ?https://www.tacomaworld.com/threads...differential-bearing-vibration-thread.152173/
Does the truck vibrate with the serpentine belt removed ?
Does the truck vibrate cold or hot ?
Does the truck vibrate if you select neutral and coast to a slow roll without using the brakes ? What happens when you turn the truck off in Neutral at highway speed ? Can you still feel the vibration ?
Does the truck clunk over bumps ?https://www.tacomaworld.com/threads/tacoma-loose-bed-design-flaw-explanation.388873/
Does the truck vibrate as you are braking ? When was your last brake job ? Consider the front rotors may be warped or the rear drums are out of round .
Does the truck vibrate with weight in the truck or empty ?
Does the truck vibrate while upshifting ? Have you checked your trans fluid ?
Does the truck vibrate while downshifting ? Have you checked your trans fluid ?
When was your last transmission fluid service ?
Is the vibration caused by your torque converter ? Tapping the brake pedal at highway speeds will release the torque converter clutch . You are not actually hitting the brakes ,but manipulating the brake switch . If the vibration goes away you can expect a misfire or a converter clutch issue .
Read here for more information regarding automatic transmission diagnostics
https://www.tacomaworld.com/threads...th-pics-for-second-gen-4-liter-trucks.289913/
Now that you have a lift kit installed the truck vibrates . Did you cancel your drive line angles ?
Have you looked at the condition of your tires ? Toyota says to rotate every 5000 miles .Tacoma tires must be road forced balanced using the Haweka adapter on the tire machine tsu00296.pdf
When was the last time you rotated your tires ? Are you using LUG centric aftermarket wheels that are incredibly difficult to balance ? have you considered " HUB centric rings " http://www.amazon.ca/s/?ie=UTF8&key...vptwo=&hvqmt=e&hvdev=c&ref=pd_sl_7ybe1f1pby_e
Have the balance weights fallen off the tires ?

A good vibration technician can tell immediately if your vibration is caused by the rotating speed of your wheels or by the rotating speed of your driveshaft .
If you go through this list carefully , you should be able to narrow down where the problem is .
The proper and only way to test for bad universal joints is with the driveshaft removed . You cant tell if the universal joints are seized or tight spots with the driveshaft on the truck . You may see play in the universal joints , but you wont be able to properly check the u-joints without removing the driveshaft .All it takes to create a vibration is one seized universal cup and there are 4 cups within each joint .
With this said , you cant tell if that cup is seized with the driveshaft connected .
Removing the driveshaft and manipulate each universal joint by hand from side to side feeling for tight spots as you go is the only way to check for bad u joints
If you beleive its bad motor mounts or transmission mounts , grab a big pry bar and pry at the mounts to see if the rubber is torn or weak .

CANCEL DRIVELINE ANGLES http://www.tacomaworld.com/forum/2nd...tion-free.html


Want that vibration gone ?
Tome Woods driveshaft
https://www.tacomaworld.com/threads/single-piece-driveshaft-vibes-be-gone.475797/

 

It seems like the gears are not shifting. The rpms are not going up when I accelerate. I can't feel it changing gears and I don't see it doing it in the rpm meter. It feels like I'm pushing it top hard just by going over 40mph.

 

Hi Dawn .
I am going to recommend taking the truck to a mechanic .
The transmission as well as the engine are both completely computer controlled and need to be scanned by a computer scanner to figure out whats going on . Do you by chance have a scan tool ?
https://www.tacomaworld.com/threads/scan-gauge-vs-ultra-gauge.157142/

 

Gearcruncher, I do not have a scan tool. I was hoping to get some insight into what it could possibly be before taking it to a mechanic because they always assume I am just a silly, little girl who doesn't know anything about cars. I am not a silly girl, and I do know a tiny bit about cars, but I always feel overcharged because they take advantage of the fact that I don't know everything about cars. I definitely don't feel comfortable driving the truck, though, so I am taking it in on Monday. Thank you all for all your help!

 

My 2009 did exactly the same thing, and when a u-joint died at 122,000 miles, it was replaced and the issue totally went away.

 

Thanks, everyone, for the help! It turned out to be the carrier beating. Much better than the whole tranny.

 

Oh no, a carrier beaTing? That sounds terrible!