Beefing Up Unibody Cars With Home Made Torque Boxes



While Unibody chassis are designed to flex and give, there are certain areas that the engineers at Ford and Chrysler needed to add bracing for certain applications.
Here’s why and how they accomplished this, and a look at how you can fabricate similar structures at home.
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31 Comments

  1. Hay tony!! Wen you gonna get a lift lol ?? But ya car manufacturer wonted that thin profile to . A full frame car is heavier in theory? We could speculate all day but ??? Hahah he dos a good job.!

  2. I have a 1972 Chrysler New Yorker Brougham and never understood how a car that big could come as a unibody car. I'm lucky it wasn't driven hard or that long before sitting in a garage for 30 years because the driver got dementia shortly after buying it in 1973.

  3. Good episode.73 Duster Big Block here. This is an Ex drag car and has the welded sub frame connects all ready in. Not going to cut them out but will add the Boxes F& R. Nice Job.

  4. Cool video, what do you think about the subframe connector from front to back? I weld in a 2×3 box steel from the front frame to the back and it seems to work well.

  5. Right? Right? I gota show you something, Right? Show quality body work Right? Right? Why are you asking viewers if your right when you haven't asked a question. You apparently knew the 383 was a 383. Why ask Right?

  6. Awesome video guys thanks for all the cool stuff you put up and I had to watch this one. "Kiwi classic customs" is like a tounge twister for uncle Tony I almost break out laughing every time. Even kiwi is like wtf!

  7. I have an entire is car tool chassis kit but always planned on adding home made bits as well.

    EDIT are you saying the frame rail connectors are bad?

  8. Nice clean install. Without sub-frame connectors front to rear it's still rather flimsy and with anything above stock power levels or if it actually hooks up and doesn't spin it will twist. You loose ET and waste effort everytime it twist, period.

  9. I like hotrod classic cars. Sweet ride for sure. A lot moths in wallets these days. The classic every day driver cars how much would it run buyers today? Where to find ECT. I know and watched a few videos you did on what to look for in buying a safe restorable classics before. You are a realistic expert on cost and conditions. So can you do an update maybe? People around me truely hate new cars and the constant repair they need and have expressed wanting a plain Jane family classic ride.

  10. Tony, my original '69 340 Swinger has factory torque boxes in the front that are pretty much the same as the ones Kiwi installed in the subject car. I'm assuming you meant that Mopar B and E bodies didn't have front torque boxes?
    Also, Kiwi's rear torque boxes look really good but they don't triangulate the front spring hanger bulkhead into the rail or rocker. His are good, but I think I'd want to tie the bulkhead in also.

  11. Regarding being unable to run the frame rails straight back, I've actually seen that done to stiffen up a rusty beater Ford Falcon (the bigger mid-late 60s model), it worked better than you'd think. The 2×4 tube went through the driver's foot well in a good spot between your feet that wasn't in the way once you were seated, probably could have even made a clutch pedal work in there.

  12. Your enthusiasm for the car hobby is tremendous! Then you bring loan a channel like this kiwi and I've been watching his episodes. He's the Rembrandt of auto restoration. A customer of mine introduce me to the mustang pony cars. This is back in the day when he had mustang corral. I saw his work after completion never really looked underneath. Now multiple years later siblings when I see this man doing with mustangs and other cars is awesome and so much craftsmanship into each aspect of each project shown. Overall quality brings out quality. Kiwi is more reserved on his videos but your quality of workmanship, well it's no surprise that you know other people of high standards of quality workmanship. Now 30 years ago I'd be putting this to more use. But I share with my son and it teaches so many things. To sum it up quality counts! Thanks for introducing kiwi. I can see why up at d&d garage in Canada yes so much respect for you and your abilities. He has skills desires to be better and fortitude drive forward. Initially somebody who was hacking away at tri-fives losing the extra doors got my attention like It did so many others. He kept mentioning you more and more that I thought what the heck I'll take a look. Glad I did. The three of you have so much heart for the car hobbyist as well as a hobby itself. You're not afraid to give away secrets and it's probably safe to figure over 85% or better or just watching to learn and enjoy. But some part of the remaining 15% may actually apply the knowledge. Days gone by professionals would hide the trade secrets and their own personal creation of how to do something because they're full of competition at least in part. Now with all this communication including YouTube everybody can learn from everybody and the whole hobby improves and benefits. As I say all I do with this information disseminated to my son. I believe that's quite a big thing because regardless of how old I may or may not be he'll graduate in high school and continue to take a love of the car hobby into the future . Isn't this at least part of what you three men are wanting to do? That is to bestow on as many in the future generations to love of the car hobby so it continues and your knowledge is not lost . It becomes part of it legacies

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