Possible Tundra Bed Bounce CURE FOUND

[vegasheat]

Originally Posted by Time4change

So all trucks(other makes) that do this have a frame problem???

I'm not sure other trucks go from fully boxed to double "C" to single "C" frame.
Double "C" to single "C" is too weak to support a heavy cab. So, when you drive over these cement grids it's like a rubber band between 2 fingers when pulled back and let go. This is all just my opinion of what I observed over the past year in driving my Tundra over these bad roads.

[5600lb Rocket Sled]

Originally Posted by mendonsy

OK, sorry to stir up this thread again, but I had an opportunity to test some stuff today. I was on a 5 mile stretch of really bad washboard concrete (I890 West from Schenectady, NY to I90). I tried different speeds from 45 to 70 and watched carefully in my mirrors. My 07 DC did not have any bed bounce at all.
Not that I'm complaining mind you, but something has to be different with the trucks that do have a problem.

In my experience, it's not the bad washboard concrete that causes the bounce. It's also not necessarily bad pavement conditions or rough roads at all. Those will make for a crappy ride, of course, but not necessarily produce this so-called bed bounce. It is the vast expanses of newer construction highways near big cities like LA, Houston and Phoenix made of cast in place concrete with expansion joints. I can also think of some expanses on I-10 in some southern states that are all concrete. I would wager that all 07+ Tundras do it. I didn't really see the big deal myself - hey it's a truck so it rides like a truck - until I drove a section in Phoenix and felt my insides go on spin cycle. It was uncomfortable and unnatural. You have to hit the right kind of road at the right speed, and I can't think of a lot of places in the northeast where you'd find it (asphalt being the preferred road construction material up there). But I bet any new Tundra will get the bounce in the right conditions.

[Time4change]

Originally Posted by vegasheat

I'm not sure other trucks go from fully boxed to double "C" to single "C" frame.
Double "C" to single "C" is too weak to support a heavy cab. So, when you drive over these cement grids it's like a rubber band between 2 fingers when pulled back and let go. This is all just my opinion of what I observed over the past year in driving my Tundra over these bad roads.

You're correct.....NONE of the 3/4 ton trucks have the "Double C".

They ALL go from fully boxed to "single C-channel" the FULL length of the frame.

At the risk of being redundant, EVERY truck I've driven empty exhibits the same resonance over the same sections of freeway.

One I forgot about was the 215 E as you exit the 15 going to McCarron.

You are more than invited to meet with me and we will take my f-250 out , I'll ask my buddy with the 2500 Dodge to meet us (who is getting a kick out of this) and during one of my roll off dumpster runs, maybe we can hook up to run the 6500 GMC.

All these trucks exhibit the same bounce when unloaded.......it is not a bending frame.

[mendonsy]

Originally Posted by 5600lb Rocket Sled

In my experience, it's not the bad washboard concrete that causes the bounce. It's also not necessarily bad pavement conditions or rough roads at all. Those will make for a crappy ride, of course, but not necessarily produce this so-called bed bounce. It is the vast expanses of newer construction highways near big cities like LA, Houston and Phoenix made of cast in place concrete with expansion joints. I can also think of some expanses on I-10 in some southern states that are all concrete. I would wager that all 07+ Tundras do it. I didn't really see the big deal myself - hey it's a truck so it rides like a truck - until I drove a section in Phoenix and felt my insides go on spin cycle. It was uncomfortable and unnatural. You have to hit the right kind of road at the right speed, and I can't think of a lot of places in the northeast where you'd find it (asphalt being the preferred road construction material up there). But I bet any new Tundra will get the bounce in the right conditions.

Yes, most of the roads are now asphalt here because the expansion joints turn into a washboard. The spring frost cycle gets into the expansion joints and causes the washboard effect. I guess I don't understand the difference between that and what you have in the southwest. Again, I'm not complaining. I'd rather not know.

[SirLunchalot]

Could the Bed Bounce be what I am feeling in the back (mostly right side) of my truck at higher speeds. Almost non-existant with regular tires and stock wheels. But when I put BFGs All terrains and aftermarket wheels, was tremendously magnified - drove the tire store nuts trying to find solution to the "poor balance" feeling in rear. I have Crew Max SR5, 08.

[jliltd]

Originally Posted by 5600lb Rocket Sled

In my experience, it's not the bad washboard concrete that causes the bounce. It's also not necessarily bad pavement conditions or rough roads at all. Those will make for a crappy ride, of course, but not necessarily produce this so-called bed bounce. It is the vast expanses of newer construction highways near big cities like LA, Houston and Phoenix made of cast in place concrete with expansion joints. I can also think of some expanses on I-10 in some southern states that are all concrete. I would wager that all 07+ Tundras do it.

Concrete freeways with expansion joints are "old-school". Unfortunately that means larger metropolitan areas have them more than smaller cities since they were the first to jump on the concrete band wagon long ago. The way "new" concrete freeways are made are continuous without joints. If you ever head East on I-10 you'll see continuous concrete w/o joints from the Texas state line to the Pecos county line (Lewellen Moss country). Smooth as silk.

I still have yet to experience any bed bounce, even in the Tucson / Phoenix areas where I travel frequently. I am still attributing my luck to having the long bed DCab with the extreme wheel base (i.e. different elasticity and natural frequency).

Based on this and other threads Toyota may want to try shift the frequency of excitation out of the range of common US roadways.

[Time4change]

Originally Posted by jliltd

Concrete freeways with expansion joints are "old-school". Unfortunately that means larger metropolitan areas have them more than smaller cities since they were the first to jump on the concrete band wagon long ago. The way "new" concrete freeways are made are continuous without joints. If you ever head East on I-10 you'll see continuous concrete w/o joints from the Texas state line to the Pecos county line (Lewellen Moss country). Smooth as silk.

I still have yet to experience any bed bounce, even in the Tucson / Phoenix areas where I travel frequently. I am still attributing my luck to having the long bed DCab with the extreme wheel base (i.e. different elasticity and natural frequency).

Based on this and other threads Toyota may want to try shift the frequency of excitation out of the range of common US roadways.

RE: "your" sig.
Just out of curiosity; did they really spell "you're" that way???

Was that at Beale??

[jliltd]

Originally Posted by Time4change

RE: "your" sig.
Just out of curiosity; did they really spell "you're" that way???
Was that at Beale??

Good catch. I cut and pasted it verbatim from another site and never gave it a second thought. My bad. And I think it was Beale.

Since we've twisted off topic, I helped assemble a retired CIA A-12 variant at Seattle's Museum of Flight about 16 years ago. Was helping restore a B-17 for the "Memphis Belle" movie at about the same time.

I've changed my signature to the sign from the entrance to Detachment 1 based at Kadena AFB in Okinawa.

[DirtyFraz]

Sorry in advance for not reading all 33 pages of this thread , but is the bed bounce problem more/less of an issue with CrewMax's vs DC's?
I'm considering a purchase of an 08 DCSB, have owned 3 other trucks from Tacoma to Chevy full size to my Gen-1 Tundra, and never experienced any of what is being talked about here--but I don't want to either! My Gen-1 rides like a dream as far as trucks go, and I'd be willing to sacrifice a bit of that for muck more towing capacity and cab space. Also, do the 08's do this less than the 07's for any reason? Thanks

[Sean Dempsey]

I hit a patch of concrete freeway in Salt Lake City this week, and I did feel some bed bounce - but also, the streets and the evenly spaced bumps and joints are pretty rough anyways.

Wasn't a huge deal, but I can see how that would be annoying if you traveled on concrete freeways alot. I have never experienced it anywhere else other than a stretch up in Northern Utah though.

[Art64]

Boxing the rear frame on an RCSB and multi-link rear suspension mod:

RCSB 5 link Rear Suspension Progress and PICS

[Time4change]

Originally Posted by jliltd

Good catch. I cut and pasted it verbatim from another site and never gave it a second thought. My bad. And I think it was Beale.

Since we've twisted off topic, I helped assemble a retired CIA A-12 variant at Seattle's Museum of Flight about 16 years ago. Was helping restore a B-17 for the "Memphis Belle" movie at about the same time.

I've changed my signature to the sign from the entrance to Detachment 1 based at Kadena AFB in Okinawa.

COOL STUFF!!!


USAF vet here; jet engine mech.

Did my time on F-4's............the Blackbird to me is Viagra!!!

(even though I heard they were kinda maintenance nightmares because of the extreme expansion/contractions they went through)

[los211]

check out this video. This is the bed bounce that most people have been trying to cure. Granted most areas of the country don't have the typical slab type freeways this is what the major complaint is with the bed bounce. just add the "tt" to the link.

h**p://www.youtube.com/watch?v=JNgHHtvzmu4

[Keto]

Originally Posted by los211

check out this video. This is the bed bounce that most people have been trying to cure. Granted most areas of the country don't have the typical slab type freeways this is what the major complaint is with the bed bounce.

Yup, typical big truck behavior. My F250 does the same thing.

Put some weight in the bed (trucks are designed for hauling heavy things), and it'll ride better.

[los211]

I have driven a lot of trucks over the years and some equipment that has never been off an airport. This "ride" to me is not normal behavior. The only thing I have driven that ever did this was a 33' Penske truck with nothing in back. that was the worst beating I have ever gotten. I drove the truck from San Jose to San Francisco to transport my rollaway tool box. round trip was about 80 miles and 70 of those were spent under 55 because that was the speed that allowed me to focus enough to drive. I drive gm 2500 and ford f250 every day and don't have that much shake.