Changing metal tub to fiber glass shell on cj5 - JeepForum.com

 
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post #1 of 8 Old 01-16-2010, 04:19 PM Thread Starter
op-and-sons
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Changing metal tub to fiber glass shell on cj5

Hello , I was wondering if anyone know the best way to measure the holes that have to be cut out on a fiberglass shell.

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post #2 of 8 Old 01-16-2010, 04:21 PM
farmer-dave1
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I've never done it but any chance you could lower the shell down on the frame and get it square and then mark the holes, or drill it in place. Just curious why fiberglass instead of aluminum.
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post #3 of 8 Old 01-16-2010, 04:48 PM Thread Starter
op-and-sons
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thank-you I will try that , and I am using fiberglass because it came with my jeep when I bought it .
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post #4 of 8 Old 01-16-2010, 04:53 PM
farmer-dave1
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Post how the project goes. I'd really like to replace the tub on my scrambler to a aluminum one. Rust has really taken it's toll.
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post #5 of 8 Old 01-16-2010, 05:00 PM Thread Starter
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also, how would you compare the to bodies to cut holes in the firewall ?
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post #6 of 8 Old 01-16-2010, 05:20 PM
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When I did mine, I made a cardboard template of the firewall and marked all the holes on it. Then I put it on the FG tub and marked where they went. One word of caution, if it's a 4WD tub you'll be adding about a 2-in lift via the rubber mounts. This will cause things like the clutch mounting brackets to move down on the new tub.
As far as mounting the tub on the chassis, I put the tub on the frame, then measured to get it centered up left and right, then I lined the firewall up with the first (I think it's the A) body mounting bracket on the frame. Then I drilled in place for the mounting bolts.
Hope this helps.
Tadd
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post #7 of 8 Old 01-16-2010, 05:41 PM Thread Starter
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thank - you , i'll try it out.
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post #8 of 8 Old 01-17-2010, 06:31 AM
rixcj
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Quote:
Originally Posted by farmer-dave1 View Post
I've never done it but any chance you could lower the shell down on the frame and get it square and then mark the holes, or drill it in place. Just curious why fiberglass instead of aluminum.
Aluminum is nice, but it's not a bolt-on-and-it'll-last-forever thing. Aluminum DOES corrode, when it comes in contact with salt, or dissimilar metals. There are A LOT of dissimilar metals that come in contact with a tub, including all the bolts.

When I worked at a sheetmetal shop, whenever we "skinned" steel locker frames with aluminum panels, the frames all got primed, and painted,then, there was an electrical tape barrier taped between the frame and aluminum, before riveting the skins on.

It requires a different approach in regard to painting, but, no biggie there.

If you ever get a dent, or it tears, who's gonna fix it?

And, aluminum body parts are more expensive than good quality fiberglass body parts.

These are things to be considered before investing in aluminum.

Rich

'79 CJ5, AMC 360, t-18/d20 twin stick, dana 30/amc20(Mosers), Edelbrock Performer intake, Holley 600, ps/pb, DUI HEI, 'glass tub/1pc. tilt nose, 33x12.50 BFG AT's.

There's a fine line between "hobby" and "mental illness".
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