Rebuilding The Rusted Out Chassis On Our Square Body - Carcass S2, E2
2024 ж. 1 Мам.
321 151 Рет қаралды
A 50 year old tow truck gets a newly fabricated rear chassis to return it to its former glory. #chassis #rust #squarebody
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PARTS USED IN THIS EPISODE:
Matco Tools: MATCO Tools are the Official Tool Supplier to PowerNation
The Industrial Depot: Tools, Hardware, Shop Supplies
I'm amazed at the mental gymnastics they went through to calculate the bends in c-channel that could have been done in a few seconds with a piece of cardboard.
And I thought they were only for holding pizza 🤔
haha that’s smart. I’m a welder and honestly I was just lost through most of this.
Lol..I appreciate the effort it took to come up with all that, but...yes...could have been done in a lot fewer steps....old school way. But...what do I know....I'm from the South side of Chicago here on vacation.
Saturday mornings just like in the old days
It's great to see Lloyd and Harry finally get seriuos.
🤣🤣🤣
😂
Basic squarebody knowledge. 1 ton perches are 40" center to center. 1/2 ton and 3/4 ton are 42".
No fishplates to the new new frame section 😬
I notice these type of videos attract a lot of YT experts in the comments. 😂
These guys must have started watching Pakistani truck here on YT.
The only difference is these guys have better tools. Still sketchy af and most likely to break in half.
Exactly... Haha
Lol
Jeremy, Jimmy, you guys really have taken a great turn in your show. The biggest thing is that your deliveries to the camera, and personal interactions, do not seem forced. Really, it seems quite natural and appealing. Maybe you two are dialing it down from what your every day would be, but the way you two are presenting yourselves draws the viewer in to what to be a part of, or at least learn from, what you are doing. Whomever decided the direction of the builds should also be commended. Your builds are not so polarizing (to be tactful). I still am anticipating, really, looking forward to something “non-traditional” in the builds to come, but I’m not expecting you guys to happy-yell at me that you are taking an old Port-a-potty truck and making it into a hovercraft you call “THE FLOATER.”
They clearly demonstrated how NOT to replace rusted out rear channels
I would have just gotten a new frame
Maybe a cut at a 45° angle to have more surface area to weld and add a backing plate...but, maybe that's why we're not on TV 🤷🏻♂️
@@bigboreracing356 uhhh...... a 3G weld has nothing to do with structural strength
@@bigboreracing356 not really trying to show off but,that is a blind weld were its welded behind the face of what your looking at....its more common on handrails and ornamental work....very seldom would you see that on a structural job. Unless the design was revised during erection.. I'm not really into a pissing contest. I just had earthquake wire and 1" certs....
This is some serious work, great job guys! Looking like great progress 💪
The direction of this show is awesome! Very educational and tons of fabrication knowledge here. Very natural and confident chemistry!
Thanks guys. The math to find the bend line was great.
I remember when I was a kid I used to watch Stacy David's trucks! I didn't realize standards have fallen so much.
stacy wouldve either fixed that clapped out chassis or swapped over to something more modern. PN has to appease their corporate overlords these days. kinda surprised there wasnt a $10k custom built chassis slapped under that thing
love the work
This is what Carcass should have been last season. Just informative ways to fabricate junkyard finds instead of doing Pimp My Ride.
except they did it wrong. no fishplates. just a straight weld.
@@Stackali don't care bro it's a tv show this won't be a heavily utilized vehicle.
Thank you bro's
good luck doing this truck man and keep going get it done .want to see more of your working on this truck .
Great job guys! Spot on
Carcass is going to take on a whole new meaning if somebody is foolish enough to get behind the wheel of this thing, load it up, and try to drive it with that back-half on it.
Ok how would you have done it then?
Frame is an alloy which is heat treated. Welding on frames changes structure. That HSS tube is not nearly as strong. The splice to original frame also has a procedure. Not to weld vertically.
I fully agree that thing is going to snap in half, it's been welded with hardwire SMH!
The guys at Pakistani trucks be like dude your making this frame forming way more complicated than it really is.
Really nice job guys
Great job on a crusty but cool truck. And i’m so glad we use metric where i come from.
16:33 ... the bolt bottoms out. "THATS PERFECT!"
It just wasnt lining up with the hole on the other side
Haha yea that's funny! And they claimed it was perfect! Lol
Let's listen to their quote the original frame had a kick up to clear first suspension travel oh, let's just put a flat straight piece in place of it where the original kicked up was definitely some Jerry rigging going on here
Great video. Love it. Wish I had those tools.
my brain hurts. one thing for sure, someone was paying attention in geometry class.
I I love that truck !
Good Job 👍
Are there no more square body frames available anywhere in the country! Sheesh! And I love all the weld through primer they used in the welds!
I would have went after some 8" Channel iron blending the two together Diamond plating the 2 frames together
good job.....!!!
Nice fab and MIG guys!
I would definitely not tow with that the metal is not heavy enough. I have run tow trucks quite a bit and seen the factory frame crack and bend under the pressure
I wish I could have had you fellas with me in Maths at School in the 60s :)
,, ,, M Y, # 1 0, "FINGERS," !!, HELPED, !!, " M E, " !!, I N, , , , " M A T H, " !!,
To my 10th grade math teacher Mr. Whyte who turned a fast track to fail and self pity to a career of endless possiblities and common ground with my most feared and hated enemy... Numbers....
I am a structural engineer not fish plating the existing frame to the new frame goes against everything that I was taught about steel connections. The shear stress under a heavy load could break that welded connection. On a practical basis that old junk will probably never be used for any heavy towing anyway.
@@bigboreracing356 Because without an X-ray there is no way to determine id the weld is 100%.
@@bigboreracing356 To be fair you would not have to fish plate it, if the weld was done right.
It wasn't butt welded. It was slid inside of the rails of the truck and if welded on both ends it should be fine.
Neat project! I had to do a similar repair on my 1977 C10, 20 years ago, and it's still holding up fine. For those who might need to do a repair like this (at least on a half-ton), there's an easier way. First, forget the made-up channel section. Just use 4x2 HSS (I used 3/16" wall, these guys used 1/8"). Weld some cross members, like angle, across the chassis at a number of points, to ensure the original rails stay parallel and spaced correctly. Then remove all the original crossmembers (at the front spring hanger, and back of chassis), and spring hangers. Now, use a grinder or plasma to cut out the *lower* flange of the original frame rail, where it humps up and over the axle. With that done, it will be possible to slide the 4x2 steel INSIDE the original frame rails, from the back, pushing them forward. The original frame will nearly hold them in the perfect location, no measuring. Start tacking them into the frame, but only at the front, where the overlap between the old and new occurs. Then tack in the 4x2 crossmembers, noting that the front member (front spring hangers) needs to be flat/horizontal to clear the driveshaft. Once everything is checked, weld it all, and at the front, gusset between the bottom flange of the original frame and the bottom corner of the 4x2, about 2" high, to box all this in. Next, carefully cut the old framerails so that they can be slid off over the new 4x2 steel. Then attach the spring hangers (I bolted) and axle bump stops, and shock mounts. That's pretty much it. If anyone wants to know more, just ask.
What kind of steel do you use? Can you use A36 mild steel?
@@jcmeza8495 I just used mild steel in a rectangular form (known as HSS). Welds easily and is plenty strong enough.
@@gregholloway2656 Thank you! 😎👍🏼
Cool Build
Hi carcass guys great builded, we do not see truck like this in South Africa 🇿🇦. 👍
Bet you dont
Hell ya looks great
If they are a little off on cutting and measuring I can imagine going through tires from misalignment.
Good luck 👍
amazing
Looking good so far . Hopefully all the old same and new frame gets treated to anti rust coating
Very cool !!!!!!!!!!!!!!!!! 👍👍👍👍👍👍👍👍
I think I would have made a little bit differrent shock mounts that would turn 90° the other way to allow for more axle movement.
You need the box to frame where the new frame meets the old frame that makes it Bulletproof
For a tow truck I'd weld and then drill through the frame to bolt down thag shackle
Decent of you to share instead of criticize
16:56 this doesn’t look normal to me; is the chassis supposed to bend like that when you lift it with the floor jack?
I didn’t notice it bending, maybe a little flex from side to side which would be ok, I don’t know why they didn’t run the 4 x 2 box metal all the way forward to the cab though, they only overlapped by a few inches,
I didnt see any bending....just the leaf springs moving was all
It might not actually be bent; I’m watching this on mobile, so sometimes things look a little abnormal on my screen
@@Jaz_3001 Watched it on my PC, it did bend...
All the shots of just your hands at 5:24 looks like Ricky Bobby finally found something to do with his hands.
My concern here is the way you guys built your frame using Tube steel which will eventually rust out and then the homemade Channel you put the tube steel in you didn't cantilever it even though gusseted between the two you didn't cantilever it and that's going to make for a weak spot
Stupid question but why not just cut the back half from another truck ?? There was a whole line to choose from in the opening scene ...
They did a awesome job with the new back half rear chassis suspension all that full frame need is some paint or Powdercoated with any color
actually they really didn't. kzhead.info/sun/rNWhY7Sapp2nf4E/bejne.html this is how to add to an existing frame. fish plates. that straight weld is gonna break
That old to new frame joint should definitely of been fish mouthed or had a diamond plate put on it. I wouldn't trust that on a car let alone a tow truck
Your shock mounts at 90 degrees off at the top and they will break the top of the shocks.
565👍's up guys thanks again for taking your time for us all to be with you
The junk yards that I have asked in North Carolina about buying the whole vehicle, said they couldn't do it. I don't remember if they actually said it, but they implied that it was against the law. I asked about a 1993 GMC Typhoon in a pull a part yard, two weeks later it was gone. No vehicle leaves that lot that fast.
Awesome job for an old truck. I would be a little concerned doing this on something more modern as they frequently will use High Tensile steel in a chassis.
@@bigboreracing356 In the old days rivets were usually used on special steels.
You know there is such a thing as a C.W.I., right? Certified Welding Inspector is a thing..."Well, I've inspected welds" doesn't equate to an inspection certification either, as in advanced metallurgy, metal compositions including carbon content etc.,and that cert. is no joke. That's a certified welder with at least 5 years on the job then taking a hellish test that takes literally about a week to get through with a first time passing rate of about 20%!! Meaning 80% fail. I'm not downing anyone, just sayin. And a structural engineer could weigh in too!
Think i woulda just found another reg cab long bed frame back half isnt rusty but front half still suffers from same levels of rot and rust as the rear did wouldnt be suprised if the frame ends up cracking at the steering gearbox one day because of rust
I’d consider talking to dustless blasting and have them take all that rust off the bed and repair some of the structural points of the towing arm and ect it would make it 100 times easier and cheaper than taking it all apart and then having to take it piece by piece to a blasting place
What type of steel was that homemade channel made out of? I’d be curious if it has at least the same properties as the original frame, especially on a tow truck with a heavy service life. If not, it wouldn’t hurt to box it in. A frame failure could be devastating.
I’m more worried about that straight weld line. A straight weld line like that is weak
I agree. Needs a diamond fish plate. The bent channel didn’t look very straight/flat. Maybe it was the camera angles. Looks sketchy for some reason.
I doubt this truck will actually be used heavily if at all
@@reweydewy true. I guess this truck will be more of a novelty than anything. This still doesn’t send a good message to the novice DIY guy trying to perform a frame repair. I hope people do more research before attempting this themselves.
@@bigboreracing356 that’s a 3F weld, not 3G, if we are talking about test positions with what I assume is AWS D1.1 in your reference. The GMAW vertical up progression can work as long as it’s set up with a true short-circuit transfer. A weld procedure is possible for this, but not easy. Gas-Shielded Flux core (FCAW-G) is an easier and better option, though. FCAW offers more penetration and is easier to weld out-of-position (3F, 4F). Using a solid-electrode “bare wire” (GMAW) would work fine in this application, but would be better with a fish plate of sorts. It also helps get the weld positions into more of a 2F or 4F position, depending on the angle of the fish plates, making for an easier weld with better chances of getting adequate penetration. 2F in a spray transfer offers a substantial amount of penetration when compared to short-circuit or globular transfer. 3F short-circuit GMAW is not an easy weld to get adequate penetration, and 4F isn’t much better. SMAW would be a good option as well.
20:23 the flex in their 3/16 mounting plate is sketchy AF.
You guys have me digging out my straightest straight things. I got a 30 gallon barrel full of grippers and biters that were holding up a rabbit wire Tomato bunker that produced a quarter bushel of fruit I could have bought for less in Downtown Tokyo.The tools are responding to my secret recipe of anti oxidation immerserion ressurection protocol and I'm forecasting a better than 50% positive outcome on usable hand tools....In short this video slapped me awake to chase down the "I can do this!" guy that this covid pandemic scared away.Funny how life saving inspiration finds a place to just patiently wait for some of us to simply trip over it and recover from the impact trauma. I was lucky.I fell on my head.. Blsssings to you and yours! BUCS BY 12. UPDATE!!! Screw these assholes that have all of these opinions but no tact or consideration as to how they share it with others.The only stuff I've learned in life worth sharing were based on fails and what path it took to find solid solutions.So exactly what makes any of us worthy of disrespecting an honest effort when their wisdom came from the solutions they scratched and clawed out of the grease and mud,looking for the stuff to take another swing at it.We are above this snide arrogant bullshit.Anybody care to share some of their" Ye haw! this is gonna change this whole freaking build" moments or talk shit about how they're the jncarnation of Lil John Buttera? Grow the Freek up
I’m a welder, building heavy equipment for miners. HOW DO I GET A JOB LIKE THIS!
Great work!
Oh no it’s a new video I need it now tho
This episode makes me wish that I would have paid better attention in geometry class 🤓
I feel like a dunce with the math they're doing.
@@austindillard8936 Obviously these guys have done this kind of work before, they have professional level equipment, a budget to be envious of, a lift that most Joe homeowners wouldn't have in their garage, and they're getting paid to do this... The way that he made his C channel, I'm impressed with the know-how. I'd like to be at his level one day.
This episode makes me thank God I don't live in Tennessee.
@@jasonholloway2476 There's still a fundamental flaw to how they did it, making it lower un height, and with how they welded it together, it makes for a weak structure...
Other commenters have said that as well. This better be a truck for show only, not real use
Could that be welded with 7018 stick.because that's all I have.
I operated a shear for a couple years in a mechanic shop in Houston. It was a good experience they had everything.
How much does that wrecker body weigh? You should build a new one from polished aluminum diamond plate so it looks like a wrecker body but mount rhe tow boom to the frame directly. Or you could just buy an aluminum wrecker body.
You guys should do a 80s Toyota 4Runner or pickup with a 6 inch lift and 35s
They didn’t even do any fishplates at the joints. Sketchy
That chassis over the axle should be taller. You can tell this is for show only, and not work. Still nice job regardless.
Well the fact that they are putting in an automatic with a 480 mechanical lift shows its for just a show
They went from C channel to tubing-I think they actually made it much stronger.
My thought is I think I would have felt better if they would have overlapped the tube on to the c farther but overall I would say it should be pretty tough
they also didn't do any fishplates, just a straight weld. definitely gonna break in half.
Long live the metric system! 😂
Your little 3 or 4 inch overlap of new frame to old isn't good enough. There also should have been horizontal diamonds welded on to reinforce the spice better. If that truck actually got used as a tow truck, that splice would not hold up.
@@bigboreracing356, nope, I've always had better sense. However, I have seen several welded that way that didn't hold. Any other "good" questions?
@@bigboreracing356 whatever. I've seen that same type of repair break several times from abuse vehicles go through, and I wouldn't bet your grandchild's life on it, but you go ahead.
@@bigboreracing356 and you think the welding in this video will hold, and I think you're wrong.
@@bigboreracing356 But you're willing to defend it, because your "quality of work" would not fail. Since you didn't do this welding, your whole argument is moot.
@@bigboreracing356 and what is wrong with diamond plates or even fish plates? it can only make it stronger and doesn't hurt anything. why not make it as strong as possible? its just a bit of extra metal, not even that much and some extra welding. this guy cut a jeep in half and welded fishplates and diamond plates. kzhead.info/sun/rNWhY7Sapp2nf4E/bejne.html
The C Channels arent bent to the exact 90s. Theyre off. Makes my OCD go nuts lol.
My girlfriend has crooked pictures hanging in the hallway.The wedding is off....Its the civilized thing to do...
@@toosunakabooma1213 hahahaha
That’s a great new back half but why not add a fish plate so it won’t split in half back them GMC PD series Grumman Flxible ADB Buses and MCI 96A3 they had Cracked Frames back then
Ok mad respect for that math game
I think new Chassis not strong because oem Thick and one Piece Chassis
What 7" air grinder is that anybody know ??
FINALLY they are rebuilding and saving something, instead of just trashing classic vehicles and making them less than they were. At least, I hope that's what they are doing...
Opino la medicion con un flexometro no es exacta para la fabricacion de un chasis, ademas la resistencia del material nuevo y la certificacion de las soldaduras no se vio en el video. No se cual sera el uso real del vehiculo despues de dicha modificacion "garantia"
well some one had to ask it so may as well be me why is one shock one way and the other opposite
thats the way gm designed it.
So the frame decided to stop rusting and rotting out right at the back of the cab?
the gap between the cab and bed allows rain to get to frame,and rust it there,my 79 gnc tow truck is bad there,they sit outside in the elements for years
Mig weld is not strong. Arc welding is way better. They didnt even chamfer the cross members before welding. This frame will break right after the weld. A frame not only flexes, it twists alot. If you dont spread out strength over a far distance it will fail. This is how you join the two frame halves, use a Z joint like iron workers use on I beams. then cover the length with a separate C channel about 2 feet long fit inside the existing frame joint , then weld the C channel with interrupted welds about 1/2 -3/4 inch long. Along its ends. You should have used 1/2 inch grade 8 bolts used with a welded spring perch all four perches
Ain't many cars on the road you can tow with that.
The gm life lol
Based on the grill and emblems...it’s not a ‘77, but rather a ‘73 or ‘74
Amazing what you can build with 2million in equipmenr
Best show since Shady Tree Mechanics! lol
👍👍
About time they did a real project instead of butchering a 3rd Gen F Body or making a TB ugly. The only Problem is I would of pulled the body, trans, engine, cleaned the chassis up, repaired any of the body, rebuilt the engine with vortec heads with a common rail fuel injection system with a 6 speed manual or automatc. Or did a fresh carb overhaul with a 6 speed manual. I would of put in the frame with the proper well over the axle like the original frame. Also I would of kept the new frame dimensions exactly the same as the old and added 3 foot box splices that fit the inside of the frame all welded to add strength.
As long as that chassis, suspension, and drivetrain or structurally sound, I'd keep the patina on the body.
Tow truck with a small block is wothless . Its all for show. Big block 454 will run circles around it and make you money for years to come
Not necessarily. When I was a little boy, my papaws friend started a wrecker service. Early on in his business adventure, his wrecker blew the original 350 sbc up. Papaw pulled his own tow truck into the the garage, removed the engine, pushed it out and brought his friends in and gave him the motor. It lasted for years and made him thousands of dollars, if not hundreds of thousands. It’s not all about the engine, it’s gearing from the transmission and rear end as well.
Mader never looked so good!
Metric so much easier than fractions 🇨🇦
Fractions are extremely easy to convert to decimal points
What about the front all the Rust
It'd be cool if they did a burn chevy silverado off copart
Came for a truck restoration, but apparently stayed for a geometry lesson 😐😐😐
"17/128ths of an inch..." Time to move to the metric system lads. 3.5mm easy peasy.
So is 0.133 inches.
Metric is for those who fear fractions and decimals
@@bigboreracing356 ummm, the rockets used on the Apollo missions were designed by a German who used metric system... And America won the war using a bomb made by a German who used metric system... Haha fail loser...