Comments on: Toyota Tundra Bed Bounce: Owners Survey

By: B.davis

B.davis — Tue, 05 Aug 2008 15:37:48 +0000

Thanks for the info.. I’m curious if anyone has tried any other type of device in place of the high density foam.. something that will not need replacing every few months that would offer the same functionality.. perhaps a small innnertube partially inflated?

By: admin (Jason)

admin (Jason) — Sun, 03 Aug 2008 02:12:52 +0000

B.davis - Short answer, yes. Unfortunately, you’ll need to replace it every few months.

By: B.davis

B.davis — Thu, 31 Jul 2008 19:40:33 +0000

Doesn’t the high density Foam eventually set (similar to memory foam) thus reducing the dampening effect?

By: Troy Courtney

Troy Courtney — Wed, 09 Jan 2008 20:59:25 +0000

I have an 07 5.7 double cab with a 2.5″ lift in the front, air bags in the back (low pressure when not towing) and tonneau cover. I have only periodically experience the “bed bounce syndrome” and even then it was not extreme. I did notice that any bounce I had went away when towing or hauling a load. For now I have thrown 240 lbs of sand bags in the bed just over the wheels (they never move with the spray in liner). I don’t consider sand bagging a perfect solution, but those in combination with the lift and air bags (10 psi) I have a great ride (considerably smoother than the day I drove it off the lot).

By: trdscray

trdscray — Wed, 09 Jan 2008 17:45:46 +0000

other thought, is to add a tube between the bed and the cab….
Thanks to Mathew Davis for the idea regarding the foam pad!!! “thanks again!!!”

By: trdscray

trdscray — Wed, 09 Jan 2008 17:39:36 +0000

Hello everyone. Proud owner of a 2007 4X4 5.7 double cab… instead of using a knee pad foam, i used a 2″ 26″ bicycle heavy duty intertube….. i know it’s not a complete cure, but it helped a lot!!!

Thanks, Ray J.

By: Daniel

Daniel — Mon, 10 Dec 2007 22:51:36 +0000

Thanks Mathew

I cant wait to try it on my cremax
except I’m going to get the dealer to do it
D

By: Matthew Davis

Matthew Davis — Mon, 10 Dec 2007 21:34:10 +0000

Hello everyone. I am the owner of a 2007 Tundra double cab 4X4 with the 5.7 engine. I have noticed the bed vibration since shortly after purchasing the truck in July. I had some time on my hands the other day, so I got up under the truck to see if I could identify the sourse of the vibration. Those of you who own this truck can go and grab the rear bumper and shake it up and down vigorously and you will observe independent motions of the bed and the cab. I began to realize that the frame has a harmonic frequency with a pivot point between the engine/transmission area and the rear axle area of the frame. (Visualize a guitar string.)You can get into the bed of the truck and stand directly over the rear axle and jump up and down, and you will find that it is almost impossible to make the same vibration that you can easily achive by applying pulsating pressure to the bumper or open tailgate. I thought about the idea of attaching some sort of weight to the rear bumper area, but as I considered the idea, I realized that this would only change the frequency of the vibration, but would not dampen it. It might even make the vibration more intense in the cab. So I thought about the idea of somehow canceling out the harmonics of the frame by creating a dampening device with a slightly different harmonic frequency attached to the area of the frame behind the rear axle as close to the bumper as possible. The logic here is that if you could CAUSE the frame to vibrate from this point, then it should be possible to DAMPEN the vibration from the same point. I decided to use the spare tire for this purpose so as not to ncrease the weight of the vehicle. I lowered the spare tire a few inches from the frame, and I cut out two peices of high density rubber foam and placed them in between the tire and the part of the frame that the tire is pressed against. I then retightened the tire to where the foam was snug between the tire and the frame. (The tire should be tight enough that it does not rattle.) This setup allowed the tire to “jiggle” slightly up and down, but at a frequency slightly higher than that of the frame harmonic. This effectively canceled out the frame harmonic and made for an amazingly smoother ride over rough, or washboard surfaces. It is also much more difficult to “shake” the truck from the tailgate area. Likely, when Toyota comes up with some sort of fix for this problem, it will use this, or a similar principle. In the meantime, the ride quality of my truck is much better. You can rest assured, that the springs are not too stiff, the shocks are not defective, the frame is not weak,and the tires do not cause this as long as they are properly balanced, and not out of round. (An out of balance or defective tire could easily magnify the problem, especially at the speed when the RPM’s of the tire match the frequency of the frame harmonic) Hopefully some of you will find this information helpful.

By: Daniel

Daniel — Mon, 19 Nov 2007 22:34:43 +0000

Well boys it seems the vibration or bed bounce, what ever you want to call it is getting worse for me as the temperature decreases. I sense it is going to be an extra bumpy winter here in Canada.

I hope Toyota is going to fix this soon. I really like the truck but the vibration is really bothering me. I’m already starting to think about selling my Crew Max.

Let me tell you, once I take a big hit money wise unloading this truck, Toyota is going to be my last choice when it comes to purchasing another vehicle (or a personal robot LOL) for at least the next 15 years (I hold grudges).

I will also make sure that everyone I come in contact with thinking about buying a Toyota product hears how I got burned.

Furthermore, since I bought the truck I have had at least 15 people approach me right of the street and ask me what I thought.

Needless to say you Tundra owners out there, we have more power then the manufacturer thinks. After all Toyota got so big and popular not because of their media advertising but because of word of mouth endorsements. So at this point if we the customers are not happy others are surly going to hear about it.

TOYOTA FIX MY VIBRATION!

By: Daniel

Daniel — Mon, 19 Nov 2007 22:32:48 +0000

That off duty cop makes me laugh. How about this the way my Tundra drives bed bounce/vibration issue.

PLEASE COME STEAL MY TRUCK IT WOULD BE GREATLY APPRECIATED. ILL EVEN PUT A FULL TANK OF GAS IN IT AND LEAVE THE KEYS IN THE IGNITION.