Why do we complain and argue?
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Post Fiend
Joined: Sep 2006
Posts: 5,181
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From: Across from the neighbors
Why do we complain and argue?
Ok so its time to have an adult discussion. Please try to be serious and give a good argument but be NICE!!!! Ok so here we go. You know lately there have been alot of guys wanting info on 4wd conversions. Alot of them question chopping two frames and adding the 4wd front frame to their existing frame. We ( and i include me here) have warned against it and even got into a couple arguments about it. But here i ask you : Why do we advise against it? My main reason is because i dont know anything about John Doe's welding experience so i just say no. But the reason i raise this is because of an episode of Exteme 4x4 on spike. They made a truggy and built a box tubing frame. They didnt bend the tubing where it needed it they just cut pieces at an angle and welded them up and used gussets. So with seeing this i was wondering why couldnt i cut a frame and stretch and/or shorten it and weld it back together? Just fish plate it and box it then it would be just as strong. I have confidence in my welding and confidence in the certified welders i have for friends. So i asked why do you advise against this?
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Post Fiend
Joined: Sep 2006
Posts: 5,181
Likes: 3
From: Across from the neighbors
Its all about how you go about welding. As far as welding a bed to a frame thats not a good idea no matter what kind of bed. It takes away the flexibility of the frame.
Senior User
Joined: Mar 2007
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not the flex we are worried about you dont want me dragging your nice clean oil pan always been told to much weildin weakins the frame but i dont know to much about weildin but just ask me to cut your frame up with a torch
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Post Fiend
Joined: Sep 2006
Posts: 5,181
Likes: 3
From: Across from the neighbors
Its all in how you do things. Cutting a frame with torches is always a bad idea unless you want to junk it. 73-79 4wd trucks had a crossmember and boxed rails all welded from the factory. A frame is so large that heat distribution is not a real issue. Ive been welding for years and ive alread spliced a 77 Riveria front frame section to a 53 buick. Worked great and its pushin 500 hp and havent broken a weld yet.
Elder User
Joined: Aug 2007
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From: South Carolina
Originally Posted by Kylet8020
not the flex we are worried about you dont want me dragging your nice clean oil pan always been told to much weildin weakins the frame but i dont know to much about weildin but just ask me to cut your frame up with a torch
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Fleet Mechanic
Joined: May 2005
Posts: 1,575
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From: Puyallup, WA
Depending on the material that the frame is made of, welding is either a go or a no go.
Easy way is to look at how the factory fab'd the oem frame, if the front cross member is welded, and the front of the frame is boxed (welded again) then it is made of the lower strength / tensil steel which can be welded.
If however, it is like what is curently used on some newer trucks (well subjective, made in the last 20 years or so), up to and including semi's and the frame is all rivited, then it is NOT acceptable to weld on the frame. These are of a special high strength steel, high tensil strength, but very prone to cracking when welded. The reason for using this material is to reduce the tare weight to maximize the load capacity.
I am sure that most have seen the semi's with the "DO NOT WELD" stickers on the rear of the frame. They are there for a reason.
David
Easy way is to look at how the factory fab'd the oem frame, if the front cross member is welded, and the front of the frame is boxed (welded again) then it is made of the lower strength / tensil steel which can be welded.
If however, it is like what is curently used on some newer trucks (well subjective, made in the last 20 years or so), up to and including semi's and the frame is all rivited, then it is NOT acceptable to weld on the frame. These are of a special high strength steel, high tensil strength, but very prone to cracking when welded. The reason for using this material is to reduce the tare weight to maximize the load capacity.
I am sure that most have seen the semi's with the "DO NOT WELD" stickers on the rear of the frame. They are there for a reason.
David
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Fleet Mechanic
Joined: May 2005
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From: Puyallup, WA
Originally Posted by DesertStorm
A truck frame is 1/8 to 3/16" mild low carbon steel. Just forged into a long piece of c-channel. No different than welding any other piece of metal.
Some can be welded, some cannot, regardless of welding certification.
David
Elder User
Joined: Aug 2007
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From: South Carolina
Originally Posted by dmanlyr
Yopu made some good points, excellent post, I agree with 90% but, only some truck frames are of this material. Not all.
Some can be welded, some cannot, regardless of welding certification.
David
Some can be welded, some cannot, regardless of welding certification.
David
Elder User
Joined: Aug 2007
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From: South Carolina
Originally Posted by Kylet8020
well then i would say we say DONT becouse all of the john does that dont know some of what seem to basic knowledge