You experienced what going 125 in a truck is like.

It's a truck, it's designed to go 55-70. Not 90, not 125. If you want to run that fast, get a mustang.

 

just my opinion, tires could be drive shaft... In my younger days I had a nissan 240sx that would spin the rollers on the dyno at 213mph at redline in 6th gear. only took it to redline in 6th gear once on pavement I can tell you the drive shaft started to wobble at about 7000rpm in 6th (9000 redline) scared the hell out of me and rarely touched 6th gear after that.

edit: and yes the tires where rated for that speed Pirelli Pzero nero's factory equipment on a lamborghini

 

In all seriousness, hasn't there been some reports of bed shake on these trucks? If this has been an issue with stock trucks that are computer limited to about 98 mph, I could see it being a real issue at 120 mph. But as others have stated, the F-150 was never designed to travel at 120 mph. If you want/need to travel that fast, I suggest buying a Mustang.

 

It convinced me that the problem is the Pneumatic, the camera is very large and the lateral displacement at that speed becomes very large and causes movement therefore necessary Pneumatic less sidewall height to dismimuir this wobble. Regarding the bed shake, it is not, the problem is not at the level of chassis is Pneumatic, and maybe suspension obviously these trucks are NOT designed for these speeds, unless, you change the geometry and suspension height. Our truck 2007, if I remember, support 0.69 g of lateral acceleration, a Mustang should be at 0.8 (not sure of the Mustang, single calculation), good suspension and the correct height in our truck and we can be in these values 0.8 to 0.85 g, there would change the story and that is my purpose. Because insi8stir in my truck and not a Mustang, simple, I love my truck, not a Mustang.

 

Huh?

 

I believe he is referring to the tires.

 

I don't think English is his first language. But it made enough sense to me (I think) after reading it slowly a few times and patching in/out words. I believe his main points were that 35" tires have massive side walls that flex at speed, the truck is too high off of the ground because of it's suspension, the driveshaft is near its limits, and the truck would be much more stable and support more lateral G if it had a tighter, lower suspension and tires with a smaller sidewall.

 

Ah makes much better sense now. It was the first sentence that really got me confused.

 

Different designs do different things. Lifted truck with 35's at 125 is asking for the grim reaper to pay you a visit. To safely operate at those speeds requires a build specifically for that purpose.

 

"pneumatic" in multiple contexts threw me off the most haha

 

Yes, sorry, I do not speak English well and should help a lot with the translator, and if, as explained KMAC0694, that's the idea I transmit. For me it was a great surprise for my truck response obtained in these specific conditions, which is why I will try to correct it, even if it is recirculated at that speed, I think, even at speeds of 80 MPH on a highway circulating with potholes, or that one will find a large bump in the road, it is better to have more control and stability to be completely OEM. That's my point. My truck is for personal use, not weight or trailer transported.

 

No problem buddy, I think you do a pretty darn good job getting your ideas across! The only other language I ever learned was Spanish and I definitely couldn't speak/type it that well even with a translator.

 

This truck has traveled about 10,000 miles in one year, I have another car for daily use, I try to be very aware of each and every one of them regarding the FX4, all ball joints, seals, bushings, rubber, etc. are reviewed every six months, so this in circulation or in the garage, like oil changes, therefore, I can ensure that there is provided not the problem. On the other hand, I want to thank all of you who share this experience with me, I believe that Americans are "big people", but in the beginning, in this forum I had some trouble with the language, I tried to share my experiences, because I think it always there are special cases, the solution may be of interest to other members. thanks

 

[QUOTE=Crash!;5008216]The last time I encountered a violent body shaking event the suspension components were faulty. Which is how I got my nick name CRASH...LMAO