Fabrication & builders section. All fabrication posts go here.
XJ/MJ/ZJ/WJ Only projects go here. Questions belong in modified tech.

Rear crossmember/brace bumper build.

Thread Tools
 
Search this Thread
 
Old 10-19-2015 | 11:17 PM
  #16  
cliffy's Avatar
Senior Member
 
Joined: Sep 2014
Posts: 739
Likes: 6
Year: 2012
Model: Grand Cherokee (WK)
Engine: 3.6 V6
Default

Nicely done.
Old 10-20-2015 | 06:47 PM
  #17  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

Originally Posted by cliffy
Nicely done.
thanks.


Just this morning, I cut a notch on the passenger side 2x4 because of a stupid bump inside the frame rail.



Rear crossmember/brace bumper build.-image-2133735187.jpg

Gotta drill two more holes on the back so I can bolt the front of my gas tank slid to the frame.
Old 10-22-2015 | 07:46 AM
  #18  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

This morning I went in work early so I can use the Bridgeport to mill a couple of square holes on the brace, so it won't interfere with the gas tank straps.

Rear crossmember/brace bumper build.-image-2080199068.jpg

Rear crossmember/brace bumper build.-image-2525455277.jpg
Attached Thumbnails Rear crossmember/brace bumper build.-image-200969101.jpg  

Last edited by XJwonders; 10-22-2015 at 09:02 AM.
Old 10-22-2015 | 08:59 AM
  #19  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

I also was able to cut the bottom corners so it would taper outwards. And notched it enough so I can bend the both ends 1.5 " backwards. Gonna have to scrounge up some 1.5" angle to weld on the top.

Capped both ends with bunch of tack welds.



Rear crossmember/brace bumper build.-image-966103081.jpg Rear crossmember/brace bumper build.-image-2548755347.jpg Rear crossmember/brace bumper build.-image-2953374808.jpg Rear crossmember/brace bumper build.-image-306774159.jpg

Last edited by XJwonders; 10-22-2015 at 09:01 AM.
Old 10-22-2015 | 09:03 PM
  #20  
JandDGreens's Avatar
CF Veteran
 
Joined: Jan 2013
Posts: 1,029
Likes: 35
From: Colorado
Year: 1991 2-Door
Model: Cherokee
Engine: 4.0 liter
Default

Nice work, very similar to what I ended up doing, very solid for my bumper.
Attached Thumbnails Rear crossmember/brace bumper build.-rear-tire-carrier-mount-001-1024x768-.jpg   Rear crossmember/brace bumper build.-rear-tire-carrier-mount-002-768x1024-.jpg  
Old 10-23-2015 | 09:29 AM
  #21  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

This morning, I had some extra time to tack the shackle mounts to the bumper, and weld the 3x3 tubes to the mounts. Rear crossmember/brace bumper build.-image-2383463989.jpg


Rear crossmember/brace bumper build.-image-2827532810.jpg
Old 10-23-2015 | 09:57 AM
  #22  
93_xjcherokee's Avatar
Banned
 
Joined: Oct 2014
Posts: 17
Likes: 9
From: tucson
Year: 1992
Model: Cherokee
Engine: 4.0
Default

Looking good. I tried many times to make a rear bumper and couldn't get my ideas right. What came out on paper and in my head just didn't come out in a bumper so I scrapped every design.
Old 10-23-2015 | 10:08 AM
  #23  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

Originally Posted by 93_xjcherokee
Looking good. I tried many times to make a rear bumper and couldn't get my ideas right. What came out on paper and in my head just didn't come out in a bumper so I scrapped every design.
try making one from cardboard. It might help better than drawing on paper.
Old 10-23-2015 | 10:50 PM
  #24  
Rogue4x4's Avatar
::CF Administrator::
Premium Member
 
Joined: Feb 2011
Posts: 14,474
Likes: 792
From: Blunt, South Dakota
Year: 97
Model: Cherokee (XJ)
Engine: 4.6 stroker
Default

Originally Posted by XJwonders
try making one from cardboard. It might help better than drawing on paper.
This.

And totally dope, man. Nicely done so far, can't wait to see the finished product...
Old 10-24-2015 | 03:48 PM
  #25  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

Added a 1.5" angle to the back of the bumper to tie in the bends on the ends. As well as to add overall structural integrity too. It's 1/4" thick.
Cut diagonals on ends to match the bends.



Rear crossmember/brace bumper build.-image-1120834511.jpg Rear crossmember/brace bumper build.-image-2768096655.jpg Rear crossmember/brace bumper build.-image-1125322740.jpg Rear crossmember/brace bumper build.-image-3554833039.jpg Rear crossmember/brace bumper build.-image-3349205959.jpg

Last edited by XJwonders; 10-24-2015 at 03:50 PM.
Old 10-24-2015 | 03:51 PM
  #26  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

Then it was time to weld everything up.

Rear crossmember/brace bumper build.-image-1734190571.jpg Rear crossmember/brace bumper build.-image-2164526898.jpg


Just a mock up of how it ll come together eventually
Rear crossmember/brace bumper build.-image-4007770547.jpg Rear crossmember/brace bumper build.-image-3092521950.jpg Rear crossmember/brace bumper build.-image-680755170.jpg

Added the mounts

Rear crossmember/brace bumper build.-image-3478206191.jpg
Old 10-24-2015 | 03:53 PM
  #27  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

In case u were wondering why there's square holes on the brace... It's to clear the gas tank straps. It appear I need to either mill out a notch or grind some material away to clear the liftgate latch bolts. I might weld it to the brace as additional tie-in.


Rear crossmember/brace bumper build.-image-349241616.jpg Rear crossmember/brace bumper build.-image-644706154.jpg Rear crossmember/brace bumper build.-image-2845290649.jpg

Mocked it up on the jeep. I like it. Need some tweaking.

Rear crossmember/brace bumper build.-image-1842287770.jpg Rear crossmember/brace bumper build.-image-4166809683.jpg

Last edited by XJwonders; 10-24-2015 at 03:56 PM.
Old 10-25-2015 | 11:02 AM
  #28  
XJwonders's Avatar
Thread Starter
CF Veteran
 
Joined: Jan 2013
Posts: 19,216
Likes: 40
From: west chester, pa
Year: 1999
Engine: 4.0
Default

Laid down a coat of red primer this morning.



Rear crossmember/brace bumper build.-image-3204342051.jpg


Still need to finish the rear brace. Time is fast approaching.
Old 10-25-2015 | 09:39 PM
  #29  
JandDGreens's Avatar
CF Veteran
 
Joined: Jan 2013
Posts: 1,029
Likes: 35
From: Colorado
Year: 1991 2-Door
Model: Cherokee
Engine: 4.0 liter
Default

Man that is looking good!
Old 10-26-2015 | 06:58 AM
  #30  
HS00XJ's Avatar
CF Veteran
 
Joined: Apr 2012
Posts: 1,843
Likes: 2
From: Ross Vegas, Ga
Year: 2000
Model: Cherokee
Engine: 4.0 w/ tupy head
Default

That thing is built nice but I thought you would follow the body lines and fill gaps more.



All times are GMT -5. The time now is 06:11 PM.