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Renix AW-4 Transmission Swap into a YJ
'87 XJ AW-4 into '93 YJ
By Shad Ahlstrom



I ordered a Slip Yoke Eliminator kit and mounted it up.  I had to press off the inner needle bearing and throw it out. The new housing didn't fit with the old 4WD shift lever.  I had to chop off a little over an inch.  Luckily, I had a very accurate tire tread depth gauge that gets pretty precise.  I use that sucker for everything.  The XJ had a 4WD shift lever that started on the transmission tunnel and went to a pivot between the transmission and the bottom of the transmission tunnel.  This setup is similar to a TJ.  I had no idea how to get this to work with my YJ since the 4WD stick never touches the transmission tunnel.
 

I ordered a Skyjacker TJ Transfer Case Shifter Relocation Kit just to be on the safe side.  It moves the pivot off the body and onto the transmission only.  I knew I wasn't going to figure this out until I actually got the swap done.  The angles are just so precise that a binding situation was a definite problem.
 

I scheduled the heavy work for a holiday weekend just in case I ran into problems.  I also wanted to avoid city code enforcement rolling by since I was doing this in my driveway.  I've had a run-in with them in the past when I was doing my 8.8 rear end swap.  A few days prior to the swap, I sandblasted the rusty parts and cleaned the greasy parts.

 

 

I ran all the wiring throughout the YJ but left out the splices that would affect drivability.
 

More AW-4 Tranny Swap

 

 

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