Vibration in first (automatic trans) when starting out only.

>>Have you eliminated the tires and balancing ?

Eliminated. The steering wheel does not have the vibration. The wheels have been balanced twice with a high speed balance.

>>Whats your mileage

114,800

>> Have you looked at the vin # to see what was done before you owned the truck
Yes, at Toyota, Carfax and (2) dealers. Nothing related specifically. The truck

was reported to have a side hit but no detail with that.

All recalls & etc. have been applied.

 

OK
Next I suggest throwing some weight in the bed of the truck and take your truck for a drive .
This is a cheap an easy way to change driveshaft angles without spending any money .
I have a feeling your factory leaf springs are sagged out causing your drive line angle to be way off by a few degrees . I would also be looking at your driveshaft slip yoke . The slip yoke was known to come from the factory with very little lubricant . It might be worth popping the driveshaft off and lubing the slip yoke up .Keep in mind , the slip yoke uses a special lubricant ....not grease
You can check your angles with an app on your cell phone as long as all 4 tires are on the ground .
Coasting to a stop without using your breaks ? do you feel the vibration ?
Transmissions do not vibrate , they shudder on upshifts or they will slip in one gear , not both forward and reverse unless very low on fluid .
Have you checked your transmission fluid with the engine running in park ?
Torque converters will not create vibrations unless all your stator fins are broken . I highly doubt this is the case with 114k . Your transmission pump would be incredibly noisy
Spark plugs only cause issues under severe load . Starting from a dead stop and slowly accelerating is not considered severe .
Tires .. Tacoma tires need to be installed using the Haweka adapter followed by a road force balance . Its in your owners manual under proper balancing procedures . In my opinion , its not your tires
Transmission is eliminated .
Spark plugs are eliminated
Torque converter is eliminated .

I am going with saggy leaf springs which change the drive line angle enough to create a small vibration at low speed

 

how many miles ??? always makes a diff

U bought truck used.....................prev owners neglect / slop come with it

 

U joints.

 

The dealer just installed a second hand driveshaft .
I could see them messing up on a partially seized slip yoke , but you think they would have checked to see if the universal joints were stuck ?
OH ...wait a minute ...the stealership installed the second hand driveshaft .
In this case , I would check the u-joints as well .hehehehe

 

Road Dog, 114,700 miles used, the vibration came with the truck.

gearcruncher,

>>Next I suggest throwing some weight in the bed of the truck and take your truck for a drive .

The vibration is the same loaded or not loaded.


>>Coasting to a stop without using your breaks ? do you feel the vibration ?

No.


>>Have you checked your transmission fluid with the engine running in park ?

Level ok.


>>Torque converters will not create vibrations unless all your stator fins are broken . I highly doubt this is the case with 114k . Your transmission pump would be incredibly noisy

Interesting point.


>>Spark plugs only cause issues under severe load . Starting from a dead stop and slowly accelerating is not considered severe .

Interesting point.


>>Transmission is eliminated .

Why?

 

I just called a local transmission place in Framingham Mass that seems to be a competent place.
They are going to go through the transmission and the rest of the truck to see if they can
pinpoint the source of the vibration. I don't mind tossing the money at the issue in this way. If they
can't isolate it I'll probably just drive it as is. The vibration may be a minor issue and a slight irritation
but the truck with go 100,000 without issue. The vibration may get worse and reveal a problem later
which would also be ok. I'll post what they come up with.

 

Another easy/free thing to check is to flip your carrier bearing bracket 180 degrees. More listed here:

https://www.tacomaworld.com/threads/carrier-bearing-180-degree-flip-question.246981/

My wife's stock-at-the-time 2006 DCSB vibrated as described by PO here. I spent some serious time over the course of several years hunting vibes and throwing parts at it. I replaced u-joints, the carrier bearing, had the TSB leaf springs installed, had TSB u-joints installed, played with weight/ride height in the bed, added Lube Guard to the trans, etc. etc. I was going to try shimming her leafs and while researching, read an article on the 180 degree carrier bearing flip and thought, "why not?". Bingo! Instantly no more vibes. Her truck has been vibe free for the last 25k miles, evening after lifting the truck 2 inches last spring. I got lucky but might be worth a shot.

 

mine had 56k when I got it earlier this year and now I have 70k. Shaking has remained the same. Mine comes and goes sometimes which is weird. If I take off from a stop with 4wd engaged the vibration is 100% gone. The truck is smooth as silk. This makes me believe its an axle wrap issue( I have the updated 4 pack leaf springs) This motors are super torquey off the line, combine that with weak leaf springs and the driveshaft design. Its a recipe to have axle wrap.

My 2019 Silverado would almost have the same feeling if I took off real hard from a light.

From doing tons of research it seems some people just simply cant fix it. Even on bone stock trucks. My truck has a build date of 6/15 so its a very late model 2nd gen and has all the updated driveline parts. While still in warranty, Toyota has told many owners this is normal for these trucks and there is no fix.

 

https://www.tacomaworld.com/threads/vibration-when-accelerating-from-stop-anyone-fixed-it.300155/

 

gearchuncher,

I now sort of get your eliminating the transmission. For now I’ll take that the transmission is eliminated.



When I drove it with weight in the bed it still vibrated on starting out but gave a smoother ride. My last truck was a VW which was like driving a car. The Tacoma is much different. I’m not sure how they ride so my inexperience with a bigger truck a problem. It was smoother when loaded but I don’t think that is related to the drive train versus dampening due to the load.



DesertRatliff,

I have read posts where reversing the carrier bearing solved the vibration and other posts where it did not. The carrier was reversed on mine and put back to normal. That did not change the vibration on mine. The shop said that changing the carrier to right orientation changed the drive shaft angle. I asked how much and he did not measure it but said not much but a change. The drive shaft angle is a factor with leaf spring lifts. Mine is stock. With whatever else is going on with a Tachoma that vibrates I can see where and angle change could fix a vibration in some cases. As I mentioned, in mine it did not.



fourfourone,



The TSB I posted above mentions this below:

• Shift into 4WD High.
• Lock the center differential.
• Remove the rear driveshaft and test drive the vehicle.
• The vibration will be completely eliminated if condition is a 2nd order driveshaft vibration.

I’m not a mechanic but think what this means is you disconnect the back wheels and drive with only the front wheels. They say if the vibration is eliminated then it is a second order driveshaft vibration. I think that means a harmonic of a lower base frequency. They say if the vibration is still there then the TSB applies.

What they don’t explain is why driving with the front wheels but that the parts the TSB call for will eliminate the vibration. It suggests that they are confident that the parts will cure the base lower vibration. I’m not sure if I have that right but it seems what they are saying.

 

I had a transmission place look at the vibration issue. I gave them a detailed rundown of the vibration & etc. They put their top guy on it with 40+ years of experience. He could not feel the vibration so they did not know what to chase down. They noticed that the carrier bearing was reversed so reset that but I think did not drive it afterwards. All in all I was disappointed about the guy not feeling the vibration and of course faulted him. They had me and another guy drive it and he felt the vibration right away. It’s not a strong nasty vibration but shakes the seat and frame and very noticeable. They discussed it again and said their estimate was it was a bad driveshaft. They said they would get one and install it and if that did not cure the vibration they would not charge me.



I mulling that over but not confident it will cure anything.

I’ve been reading more and found axle wrap. A few videos I watched had videos of the driveshaft while the truck was driven. It showed the lifting and lowering of the driveshaft as the truck accelerated and showed how it vibrated. Given those things I can see how a vibration could happen without necessarily being a killer issue. It might be considered and artifact of the system or design issue but an irritant versus a problem.

I told the shop that I did not expect them to find the source of the vibration but was looking more to a good examination of the drive parts to confirm or eliminate what might be the cause versus a solid fix. Given the guy did not feel the vibration that did not happen so other than resetting the carrier bearing which was good bring the truck there was pretty much a flop.



Given the axle wrap, leaf spring possibility the vibration may not be so important as a thing critical to be fixed versus an irritation. I’m still thinking about what to do next if anything.