GMC Truck Forum banner

1 - 18 of 18 Posts

·
Registered
Joined
·
3,382 Posts
Discussion Starter · #1 ·
What's up? I have a problem. I found out this weekend my frame it cracked around where my bag mounts are welded on and the mounts are bent up some. What can i do to fix this? I plan to make it flat again and weld up the cracks. And make a gusset that attaches to the top of both bag mounts so that the outside of the mounts put pressure on themselves.

This is how it is now before the cracks.
SP_A0084.gif


This is a crude picture but something like this.
underbedsetup2.gif
 
Joined
·
1,932 Posts
I dont see any cracks? Can you get a better pic? Also something must be going on to make it crack or rip, frames dont just do that out of the blue. before you make a brace like that I would take the mount thats on there and gusset at a 45 degree angle down and out for more strength. but that should be ok. like I said something major is going on here that you need to figure out first frames dont just crack :read:


I went and was looking again and see you wrote this is how it is before the cracks... well post the pics of the crack. as many as you can inside frame outside frame under above from a far close up in a tree I wanna see tons of pics
 

·
Serious!
Joined
·
1,546 Posts
Yea bother are a good idea. Also could put a crossmember between the rails so they support each other. Mounts like that get a lot frame twist.
 

·
Registered
Joined
·
3,382 Posts
Discussion Starter · #7 ·
I'm going to look into seperating the tanks some more and doing a 2x2 cross member right between them.
 

·
Jason RIP
Joined
·
6,062 Posts
If you look at the design of the KP 6 link, its on a huge honking plate of steel, and the rear bar mount and the bag mount have some tubing between them .. might want to take some hints from it.

 

·
Registered
Joined
·
3,382 Posts
Discussion Starter · #10 ·
I would put a 2x4x3/16th crossmember between the rails like my c10 has.
Picture529.gif

Picture528.gif

Picture523.gif

Picture504.gif

Picture503.gif
Thanks for the pics I'm goingt o try and make room for a cross member like that. I just have to pull the bed again and see what i can do under there. Probably have to totally rethink my laying out of components.
 

·
Registered
Joined
·
26 Posts
before you weld up the crack you should drill a hole at the end of the crack. It helps stop the crack from continuing. then weld it all up. another thing is if you weld your bag mounts to a bigger and thicker plate and then weld that to the frame it will help distribute the pressure
 

·
Registered
Joined
·
3,382 Posts
Discussion Starter · #12 ·
before you weld up the crack you should drill a hole at the end of the crack. It helps stop the crack from continuing. then weld it all up. another thing is if you weld your bag mounts to a bigger and thicker plate and then weld that to the frame it will help distribute the pressure
Thanks for the info. Sshould i weld in the hole i drilled or just leave it open?

Also welcome to the site bro!
 

·
Registered
Joined
·
3,382 Posts
Discussion Starter · #14 ·
OK cool. Thanks guys. Probably going to be another week before i can tear into again. Let me ask this. If i do a piece of 2x4 for a crossmember between those 2 brackets, do you still think i should do something similar to my cad drawing for a brace?
 

·
it's not fast enough
Joined
·
1,677 Posts
mine did that once..

i put them back right, and put flate plate behind where the bag mounts weld to the frame.

it's a C
what it's doing is pulling the middle of the C out and making the frame get smaller on the inside....

but i like the custom work above it looks good.
 
1 - 18 of 18 Posts
Top