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Old 02-24-2015, 02:27 PM   #1
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Interesting test

http://youtu.be/_f3CAnH7WIM
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Old 02-24-2015, 02:31 PM   #2
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frame twist test

The Rams frame is a closed box and the Fords is a C channel open frame...
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Old 02-25-2015, 09:50 PM   #3
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I would only buy a Ford truck but that test shows a frame problem. I have to assume that in the real world this doesn't make a difference. The next time I see ramps like that in my path I guess I'll have to either turn around or drive around.
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Old 02-25-2015, 10:33 PM   #4
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So...you gotta ask, is a flexible frame good or is a stiff frame good?

Sure, the Ram can open the tailgate when twisted...
But, the Ford went much farther before lifting the rear = more traction for a longer distance.

I just don't know what to think about this interesting test...thanks for posting it.

Safe travels
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Old 02-26-2015, 11:18 AM   #5
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Ford designs there HD trucks this way

Quote:
Originally Posted by Scarab0088 View Post
So...you gotta ask, is a flexible frame good or is a stiff frame good?

Sure, the Ram can open the tailgate when twisted...
But, the Ford went much farther before lifting the rear = more traction for a longer distance.

I just don't know what to think about this interesting test...thanks for posting it.

Safe travels
Ford wants there trucks to have a car like ride and handling, and that is the reason for the C channel frames...But there is a big downside to this design as you can see in the video...It gives up strength and durability..This video would worry me with 4200 pounds of pin weight setting on this frame..Its not the truck bed twisting its the trucks frame...
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Old 02-26-2015, 11:28 AM   #6
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The reason for the C channel frame is because the truck is the same basic design that came out in 1999! Since they have added lipstick and bandaids and have increased ratings without ever being able to comply with any independent testing standards. RAM is SAE J2807 compliant over it's entire light duty pickup line.

I guarantee you when they finally decide to actually come out with a "NEW" truck it will be the same as GM and RAM It will NOT flex as they do now.
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Old 02-26-2015, 12:47 PM   #7
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This is the big F-450 vs the Chevy 3500

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Old 02-26-2015, 01:02 PM   #8
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Quote:
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Ford wants there trucks to have a car like ride and handling, and that is the reason for the C channel frames...But there is a big downside to this design as you can see in the video...It gives up strength and durability..This video would worry me with 4200 pounds of pin weight setting on this frame..Its not the truck bed twisting its the trucks frame...
Frame twist is common on big trucks with 80,000 lbs of GCWR, which use (drum roll please).... C channel frames. Its not a strength or durability issue. This test is just a marketing gimmick.
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Old 02-26-2015, 01:22 PM   #9
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Frame twist is common on big trucks with 80,000 lbs of GCWR, which use (drum roll please).... C channel frames. Its not a strength or durability issue. This test is just a marketing gimmick.
That truck only had 3500 pounds in it the Ram and the Chevy had very little twist and didn't blow the tailgate out...Its not a gimmick its a fact!!!
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Old 02-26-2015, 02:23 PM   #10
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Quote:
Originally Posted by cwsqbm View Post
Frame twist is common on big trucks with 80,000 lbs of GCWR, which use (drum roll please).... C channel frames. Its not a strength or durability issue...


I have seen this on big trucks too...there is even warning stickers posted on the tail section of some Class 8 trucks that reads "do not drill or weld" to (I believe) retain the steel's flexibility.

Flex can be good - "Stiff" and "durable" can be two different things.

Like...an Oak tree will break in a strong storm, but a Palm tree can almost lay down in hurricane force winds. And it pops back up after the storm.

Like I said, interesting test.
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Old 02-26-2015, 02:28 PM   #11
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This truck has more pit weight in it then the test

More pin weight then the test and 27,000 pounds total gross weight...
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Old 02-26-2015, 02:39 PM   #12
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No truck off the assembly line will satisfy every owner. We all treat, torture, and abuse our vehicles in different ways. All frames and suspensions can be stiffened. Rear track bar, Front and rear Anti-sway bars, changing shocks and coil springs. Mountain climbing off road 4x4s have their frames and suspensions tweeked and modified to limit twisting.
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Old 02-26-2015, 02:40 PM   #13
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This truck has more pin weight in it then the test

More pin weight then the test and 27,000 pounds total gross weight...
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Old 02-28-2015, 11:40 AM   #14
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Yes large trucks have C channel frames

And yes you will see them twist pulling 80,000...But here is the difference torque is creating that twist on the large freight haulers...In this 1 ton demonstration the trucks are just over engine idle going up those ramps its not torque creating that Fords tailgate to buckle and get destroyed its that weak frame...
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