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Old 09-25-2008, 11:33 AM   #1
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Question 98 XJ Swap into 88 YJ Almost Complete

Well, I am almost finished with my swap. Had a shell of an 88 YJ a previous owner had prepared for paint and a V8 swap, but decided to use a 98 XJ powertrain instead (4.0/AT/231)

What is left to do is the transmission mount, exhaust, drivelines, and interior electrical gages.

I was able to fabricate my own engine mounts (it had none) and have successfully swapped the transfer case linkage and AT shift assembly into the YJ. In terms of OBDII compliance, I swapped the complete engine harness from the 98 XJ into the 88 YJ, and the only problem is getting the code reader to work. Engine starts and runs fine, but when and if I have problems, it would be nice to get the codes. I may be looking to replace the entire harness with an aftermarket eventually if I have any problems.

My question today is angle of the transmission with the frame. Should the transmission (automatic) be level with the frame, or can it angle a bit do the rear diff? I am going to build a mount to attach to the transfer case shield and would prefer to get this right the first time!

Also, does anyone have the measurement (length) for a stock rear drive line? The YJ didn't come with one, and a stock one may work for now until I get a SYE and CV shaft installed. The AT tail shaft from the XJ is likely longer? than what would be on a YJ with an AT.

Thanks in advance for your help.

Ty

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Old 09-25-2008, 12:26 PM   #2
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im kinda doin the same thing can you post some pics of the trans mount that you fabricated.As for the angle of the trans i beleive that it is okay because i think that is what a motor mount lift does, angle the whole driveline down.... Someone correct me if i'm wrong

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Old 09-30-2008, 10:56 AM   #3
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Originally Posted by HkdOnJP View Post
im kinda doin the same thing can you post some pics of the trans mount that you fabricated.As for the angle of the trans i beleive that it is okay because i think that is what a motor mount lift does, angle the whole driveline down.... Someone correct me if i'm wrong
I haven't fabricated the mount as yet since I want to make sure I adjust it up or down depending on the angle needed (or not needed).

I intend to take a flat plate, drill holes into it using the same holes for the standard XJ transmission mount, and then determine what lift if any to add to the base. Then I will weld it directly to the tcase shield...

Thanks for the reply.

Ty
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