125 mph in a T1

gearheadesw · November 16, 2020

Riiiiight, driveshaft can handle the torque of towing a 11 K pound trailer, properly equipped, that force would shred your paper thin driveshaft long before the rpm centrifugal forces made it deform and fail. Dyno run at full throttle producing all the power the engine will make, and we think it came apart from the revs????

lapoolboy · November 16, 2020

9 hours ago, gearheadesw said:

we think it came apart from the revs????

Yep. Just as CamGTP said above, there are multiple instances of them exploding. Frankly, after seeing that, I'm perfectly fine putting my confidence in exceeding the tires speed limit vs. the driveshaft's.

Colossus · November 16, 2020

Any other limiting factor is NOT a moot point. Engineering limits exist. These trucks are not built for high speed. The drive shaft, axle, and transfer case for those with 4WD are NOT engineered for high speeds. If you want to be a ****** and argue against that, it's your own stupidity you are arguing against.

lapoolboy · November 17, 2020

4 hours ago, Colossus said:

Any other limiting factor is NOT a moot point. Engineering limits exist. These trucks are not built for high speed. The drive shaft, axle, and transfer case for those with 4WD are NOT engineered for high speeds. If you want to be a ****** and argue against that, it's your own stupidity you are arguing against.

Thanks! That's what I was trying to say - you just said it much better!

Silverado4x4 · November 17, 2020

3 hours ago, Colossus said:

Any other limiting factor is NOT a moot point. Engineering limits exist. These trucks are not built for high speed. The drive shaft, axle, and transfer case for those with 4WD are NOT engineered for high speeds. If you want to be a ****** and argue against that, it's your own stupidity you are arguing against.

Your right, the drivetrain is engineered to spin based on the vehicles spec. anything over that the shaft WILL be out of balance. Driveshaft weights are for balance at lets say 2000 rpm now you want the shaft to turn at 4000 rpm the shaft will be out of balance. A .40 oz weight at 2000 rpm will apply about 3.0 lbs of force on the shaft keeping it smooth on rotation now spin that same shaft at around 4000 rpm that same .40 oz weight will apply about 53 lbs of force on the shaft making it un-balanced. With these thin walled shafts it will be a matter of seconds before the shaft self destructs. Keep in mind if your running the truck at those speeds and start feeling a vibration you wont get the truck stopped in time before it comes out.

So this is something I what to put out there and maybe someone will think about this and save someone if you think this is BS then your on your own.

gearheadesw · November 17, 2020

I'm just having a hard time seeing the driveshaft take the abuse from towing, in particular, then spinning forces causing the metal to fail.Torsional forces create that twisting force to twist the shaft into a twisted straw, I'm just surprised the revs would expand the metal enough to fail, have seen twisted driveshafts, but never an explode one....

polarys425 · November 17, 2020

16 hours ago, Colossus said:

Any other limiting factor is NOT a moot point. Engineering limits exist. These trucks are not built for high speed. The drive shaft, axle, and transfer case for those with 4WD are NOT engineered for high speeds. If you want to be a ****** and argue against that, it's your own stupidity you are arguing against.

I said it was a moot point, because you hit the speed limit of the tires BEFORE you hit the limit of any other parts. Therefore if you don't exceed the tires speed rating, you don't have to worry about anything else.

Obviously you didn't read the part about functioning up/beyond their design specification.

When you go changing the stock speed limiter, you're asking those parts to perform outside that design spec, and that's on you.

Don't be a Richard Cranium.

Edited November 17, 2020 by polarys425