Replacing rear cross member... - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

Reply
 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 08-29-2000, 10:41 AM Thread Starter
 
Join Date: Jun 2000
Posts: 322
Thanks: 0
Thanked 0 Times in 0 Posts
 
Replacing rear cross member...

When I get the tub off and get down to the frame work, I'm thinking about going ahead and replacing the rear cross member. When I got the Jeep the guy before me welded a big ole hunk of metal (called it a bumper) to the member. I had that removed when I first got the 'Heep and this left it 'cut' in a couple of places.

With plans of installing a "bolt-on" rear bumper to the cross member, I guess it would be best to replace it, huh??

Question: Could I remove the thing with my air hammer/chisel or should I leave it to the pros?? I don't want to $#@% up the frame itself.

Thanks!

Harold is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 08-29-2000, 10:47 AM
 
Join Date: Sep 1999
Posts: 873
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: Replacing rear cross member...

You definitly want to replace the crossmember if it is in bad shape, especially if you are going to bolt a bumper to it. Also, I would suggest tying the bumper to the frame, not just the crossmember. 4WD Hardware sells a reasonably priced crossmember that is actually thicker than the stock one. I used it on my CJ-7 and it was a perfect fit.
As for removing it, I removed mine with a grinder, a BFH, a hacksaw and a lot of choice words. Basically you just have to remove any brackets and grind away the welds at the top and bottom of the crossmember. You may have to loosen the rear shackle hangers too.
I think there might be some text about this on my webpage (below) in the tubswap section.
Hope this helps.


Dan 84 CJ-7,Weber,HEI. 95 ZJ,V8. http://netnow.micron.net/~wdohrn/
Dan 84 CJ-7 is offline  
post #3 of (permalink) Old 08-29-2000, 10:58 AM
cj7jeep
Guest
 
Posts: n/a
Re: Replacing rear cross member...

I have been using a 4.5" grinder and a 3" air powered cut off wheel to remove welds on my frame. Had a cheap air chisle that i ended up giving away, my 5 pound sledge works much better. Give the chisle a shot, yours has to be better than one i had.

Sponsored Links
Advertisement
 
post #4 of (permalink) Old 08-29-2000, 11:44 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Replacing rear cross member...

consider using a goo strong piece of angle iron for the rear cross member. this will give you a good place to bolt a bumper and will be much stronger than a stock style cross member.

brian wilson
80 cj5 "high 5"
stretched to 100" wb
351w/np435/d300/d44/d60/detroits/4.56/35ss/bdlocks
post #5 of (permalink) Old 08-29-2000, 11:51 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Replacing rear cross member...

>>>>>consider using a goo strong piece of angle iron for the rear cross member. this will give you a good place to bolt a bumper and will be much stronger than a stock style cross member.
***** This is exactly what i am doing and also getting a great mount for a spare tire carrier out of it. Check out the URL in my profile to see.

Boston Mangler
post #6 of (permalink) Old 08-29-2000, 01:39 PM
Keyboard Implanted
 
jeepgod's Avatar
 
Join Date: Jan 2000
Location: Wildomar, CA
Posts: 4,618
Thanks: 0
Thanked 3 Times in 3 Posts
 
Re: Replacing rear cross member...

yes Elusive and I both used some angle iron.. 4"x3" galvanized stuff.. 1/4" thick.. welded it on over the crossmember.. i even tied in a 2" reciever tube thru both of mine.. and reinforced it on the back side of the crossmember.. just leave enough room for your gas tank.. mine came out great.. have pics on the website http://www.jeepgod.net/updates.html

<font color=orange>survival is instinct, but living takes guts</font color=orange>

http://www.jeepgod.net
jeepgod is offline  
post #7 of (permalink) Old 08-29-2000, 02:00 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Replacing rear cross member...

Kevin,
Did you actually tie that nice piece of angle iron to your frame or just bolt it to your new crossmember? From your writeup it sounds like it's just bolted to the crossmember with grade 8 bolts. If you don't tie it to the frame one good tug on that new bumper and it along with the crossmember comes off the frame.

'75 CJ5,258,T18a,4.27's,33's,On-board air,Warn 8274
post #8 of (permalink) Old 08-29-2000, 02:14 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Replacing rear cross member...

It is not ACTUALLY installed yet but it will be bolted to the existing crossmember AND braced to the frame with 2 pieces of angle iron just like the currie rear bumper braces that can be seen at: http:// http://www.currieenterprises.com/cgi...7edc+973104597

The Completion Pics Will Be Coming Soon

Boston Mangler
CJ7, T18, Dana20, Scout 44's F&R, Detroits F&R, SOA, Hi-Steering, York, etc...
post #9 of (permalink) Old 07-18-2001, 09:27 PM
Dunckelman
Guest
 
Posts: n/a
Re: Replacing rear cross member...

Ok . . . not to be dense, but I am going to be dense. I keep reading that rear crossmembers are fabricated from angle iron to make it stronger (which I need). However, I have looked at my rear crossmember and it is not L-shaped. It has a top and bottom - top for body mounts and lower to attach gas tank skid plate. My question - is the angle iron a complete replacement or is it welded/bolted over top of the existing metal to strengthen? If it is over top, which part is not reinforced (top or bottom)?

I know there is some info. out there on this subject, but I have not located anything that would give this novice the answers I need. Thank you.

This is for a 79 CJ-5 . . .

post #10 of (permalink) Old 07-19-2001, 08:18 AM
Keyboard Implanted
 
pontiac58's Avatar
 
Join Date: Jul 2000
Location: southern new jersey
Posts: 2,818
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Replacing rear cross member...

Do a search on frame repair and you will see my post and the new crossmember i had made and installed. All i did was go to the sheetmetal shop and have them bend me one out of 3/16 sheet. Super heavy and at only 20 bucks how do you go wrong.

Can someone please bring me a hammer my 33's just ate my fender again. Damn i need more lift.
pontiac58 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome