Jeep TJ Frame CAD Model - JeepForum.com
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post #1 of 9 Old 09-17-2017, 09:25 PM Thread Starter
Smeberg
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Jeep TJ Frame CAD Model

I've been working on a CAD model of the TJs frame based on the blueprints that are out there. I'm doing this mainly for myself so its not full professional work but I do work as a CAD designer. I used every available dimension on the 2D prints but there were a few places i had to estimate (complex splines in the rear axle dogleg and near the front coil tower) I will say however that its darn close to the real thing. Anyway I thought I'd throw this out to the community. If anybody wants the files PM me and Ill try to get it to you in your desired format. Pics down below.

Work in progress 9-17-17

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post #2 of 9 Old 09-18-2017, 12:05 PM
T-Jay
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Quote:
Originally Posted by Smeberg
I've been working on a CAD model of the TJs frame based on the blueprints that are out there. I'm doing this mainly for myself so its not full professional work but I do work as a CAD designer. I used every available dimension on the 2D prints but there were a few places i had to estimate (complex splines in the rear axle dogleg and near the front coil tower) I will say however that its darn close to the real thing. Anyway I thought I'd throw this out to the community. If anybody wants the files PM me and Ill try to get it to you in your desired format. Pics down below. Work in progress 9-17-17
Looks good so far. :-)

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post #3 of 9 Old 09-18-2017, 07:20 PM
GeckoJoe
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You may look into getting any measurements that you are missing from someone who has their tub off and can easily and accurately measure section of the frame rails. Great work on the drawings, a set of TJ CAD files would be extremely useful for me and many others for suspension and skid plate design work when I get that far.

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post #4 of 9 Old 09-18-2017, 07:38 PM
Jerry Bransford
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Very nice work and welcome to the forum!

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post #5 of 9 Old 09-19-2017, 02:18 PM
JStMarie
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You did it wrong. Your first post is supposed to go something like... "uhh, dunt kno anyting about nuttin but ifIgive you no useful information could you help solve my prblm anway? ..."

Best first post ever?

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post #6 of 9 Old 09-20-2017, 08:42 AM Thread Starter
Smeberg
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Update:
Ive been working on designing a frame stretch to LJ length. The design is somewhat based off the AEV brute frame stretch. The midsection is split 95 inches back from the front face of the frame and the rear end section is attached right to the end of the stock rails. Extensions are 10" and 5" respectively. Like before PM for files.

Also to anybody who has actual hands on the experience stretching the frame. If it looks like I'm doing something stupid go ahead and let me know so I'm not putting crap info out into the community.
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post #7 of 9 Old 09-20-2017, 12:06 PM
T-Jay
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Quote:
Originally Posted by Smeberg
Update: Ive been working on designing a frame stretch to LJ length. The design is somewhat based off the AEV brute frame stretch. The midsection is split 95 inches back from the front face of the frame and the rear end section is attached right to the end of the stock rails. Extensions are 10" and 5" respectively. Like before PM for files. Also to anybody who has actual hands on the experience stretching the frame. If it looks like I'm doing something stupid go ahead and let me know so I'm not putting crap info out into the community.
In my humble opinion you'd be making more work for yourself by cutting and stretching in two locations. The only reason I can think of to do that is to create that long LJ over hang in the back. Which is fine if that's what your looking for but that long butt tends to hit and drag on the rocks I cut and stretched my TJ frame all 15" right before the last side body mount brackets. Here: image-3366917578.jpg image-389565934.jpgimage-3296410706.jpg

image-3277187625.jpgimage-2538445880.jpg
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post #8 of 9 Old 09-20-2017, 01:10 PM Thread Starter
Smeberg
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I agree with you completely T-Jay, however I would like to be able to build a custom rolling chassis that you can drop an LJ tub on to. Aside from that consideration your way would be less work. Btw I was checking out your work earlier today, excellent build and write up
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post #9 of 9 Old 09-21-2017, 02:15 AM
T-Jay
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Quote:
Originally Posted by Smeberg
I agree with you completely T-Jay, however I would like to be able to build a custom rolling chassis that you can drop an LJ tub on to. Aside from that consideration your way would be less work. Btw I was checking out your work earlier today, excellent build and write up
Gotcha. In that case the only relevant advice I can offer is to mark as many pre-cut reference points and possible. Getting the frame perfectly aligned around the extensions is crucial. I spent about 2 hours nervously checking and re checking all my measurements and references points. If I could go back in time I would have made more reference points before I cut the frame just to calm my nerves.

Good luck. ;-)

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