Accident Where Integrity of CMC (cab mount chop) Questioned?

Fair enough.

I'm sure my rock sliders make all my crumple zones react exactly as designed /s

 

Better... they crush the other guy's crumple zone instead

 

i mean your not supposed to heat your frame so as soon as you start grinding and welding you already goofed it.

 

Dude... Toyota sells 25K Tacomas a month. Less than a few percent get taken offroad. that means 22,500 people are driving around on... roads. Now, a LOT of them like to fix them up and lift them and have no clue what a CMC is or does. My post is for them, not you.

 

As a former 1st aid attendant with a logging company I have seen the aftermath of a 3 ton pickup taking on a 175 ton loaded off highway log truck, head on. The log truck had a scratched bumper and the p.u. was totaled. The crumple zone worked perfectly. The radiator was pushed tight up against the p.u. firewall, with the engine and transmission dropping below the cab. The cab was completely undamaged with both doors opening and closing. The truck was pre air bag, so the driver broke the steering wheel with his face and other than some swelling and a head ache, was uninjured.

My point is that front end mods could alter the functioning of the crumple zone causing greater injury but it would be next to impossible to prove. As also a former insurance claim adjuster, even if I knew that a vehicle was modified, trying to prove that the mods made injuries worse is very difficult if not impossible and thus not worth pursuing, imo.

 

You piqued my interest there considering the logging that I see seems to be on hill sides.

Are you talking about something like this:

 

More like this, with the truck and trailer weighing about 60-75 tons and the load 100+ tons:

https://i.pinimg.com/originals/39/6c/61/396c61ade5a31fe31a11b1a34b26b9ec.jpg

 

Thanks!

I saw that and didn't think it could be 175t. Pretty cool though.

 

This isn't specifically about you, or your point.

My post is more specifically geared toward the fact that the questioning of the CMC structurally, and making the point that it could cause problems with liability in the event of a wreck is ridiculous (at best) and an argument that comes up way too frequently.

And FWIW caster setting can (and typically is) used to correct problems with wheel rubbing. It IS NOT the "other" way to fix the rubbing issue. Many times you need both. Depending on wheel backspace, true outside diameter of the tire, etc. And as far as I'm concerned... I suggest doing the CMC even if you don't "need" it on the road... you may still "need" it on the trail... and you may want to go to bigger sized tires down the road.

285/75r16 with 2 or 3 inches of lift will still rub at full lock and stuff.

There is absolutely no reason, what so ever, to suggest someone shouldn't do the CMC.

 

Over thinking is the problem

 

Lmao

 

Engineering prowess or claims of superior strength are completely and totally irrelevant if we’re taking about claims related to accident damage or injury that involves that area of the vehicle.

If the insurance adjuster (or whoever) determines that the vehicle was materially altered in any way that COULD have been a proximate cause of such harm or damage, then they have a slam dunk of a reason to deny you coverage. Period. In that scenario, it just doesn’t matter who did the work, their credentials, or any opinion. I guess you could take them to court and hire expert engineering witnesses but would you?

 

Physics. What else do you think deflected the tire and wheel down and safely out of the way? Yep, it's the cab mount!

 

All this, and it's not even Friday yet.

 

The suggestion that the heat of welding a plate to the cab mount could degrade the structural integrity of the cab mount to the point that it would not allow the cab mount area to do that job is ludicrous.

 

It is a form of high strength steel. If heated too much it becomes brittle. If there is frame damage from an accident, Toyota does not allow/approve of heating the metal for straightening. Has to be "cold straightened." It wouldn't stop me from doing a CMC, just pointing out some facts.

 

Please.
First, you need to google ultra high strength steel which is what the cab mount is made of.
Here... I will save you the trouble...
When high strength, quenched and tempered steels are welded, the heat from the arc can alter the temper on the material. For this reason, it is recommended to weld the material in the annealed condition whenever possible. Proper preheat and post-weld heat treatment are essential to minimize cracking risks
Please, if you want to debate this subject with me, come prepared with at least a little knowledge of physics and material properties.
LMAO and ludacris are not very impressive arguments. Do some research, get some knowledge.. do something... then get back to me.
I clearly posted that in a specific type of accident a CMC could be a safety concern.
I gave you reasons. I gave you a video showing what a cab mount does in this type of accident.
You clearly have a problem with these facts so please... give me your version of the physics and material strengh during this type of accident.

 

Exactly. The chances of having a CMC and getting into this type of accident and hitting it at the right angle are small and I take chances all the time.
However, I personally could not live with myself If my wife or kids were hurt because I decided on a mod for my truck and I was ignorant of the ramifications of said mod.

If I were just a single guy? Hell yeah. Having people depend on me to do the right thing and make the best decisions? That's a no on a cmc.

 

I need to just let it go sometimes.

 

This real engineer (liability insurance like a doctor or lawyer) is ready for a CMC.

Good discussion. These safety discussions always amuse me thinking that I grew up without a helmet, seat belts and sleeping on the package shelf!