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Unread 02-17-2009, 03:18 PM   #1
SteveJcoYJ
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1991 YJ Wrangler 
 
Join Date: Apr 2007
Location: Vineland, NJ
Posts: 1,709
TJ ax5/np231 conversion write-up

as part of my build i'm gonna be using the AX5/NP231/and driveshaft out of a 97' TJ in my 91' YJ. The motor is out of a 93'. On pre-94' YJ's you will need to convert to an external slave cylinder,

or you could convert the TJ trans to an internal slave, but thats a stupid idea.

to do this the way i did you will need your old YJ trans as a donor for parts

I scored the trans to the driveshaft for $200 of a guy on craigslist.


swap the mount brackets over



it's 4 bolts


an thats what your left with, next you'll need to put the mount from your YJ trans on it. Since im swapping an engine at the same time im doing all the bolting up on the ground and then just gonna shoe horn it all in



next, you will need to swap out the speedo gear housings, its a single blot that holds down a C-shaped clip, the clip fits into grooves on the housing, once you remove the single bolt the hole assembly can pull straight out. On the TJ there is electronic speedo gear, where the 91' had a cable. If you have an electronic speedometer cable then this step can be skipped.




removing from old ax5

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Unread 02-17-2009, 03:19 PM   #2
SteveJcoYJ
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1991 YJ Wrangler 
 
Join Date: Apr 2007
Location: Vineland, NJ
Posts: 1,709
here is the electronic unit being removed from the TJ AX5, same exact process



an here is the old swapped in


since TJ's dont have half shafts in the front they just had a 4wd sensor in the place where the vaccum connector is for a YJ on the tcase, The thread an size is the same so you can swap the vaccum connector in its place

it just screws out, here is the connector on the TJ ax5
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Unread 02-17-2009, 03:19 PM   #3
SteveJcoYJ
Registered User
1991 YJ Wrangler 
 
Join Date: Apr 2007
Location: Vineland, NJ
Posts: 1,709
the CPS will also need to be swapped, different connectors, everything else is the same.


after that i swapped the lower shifter housing

its 4 bolts and then it picks right out
the same goes for the YJ trans

i cleaned the old housing out with brake cleaner and lightly sanded an cleaned all matting surfaces.

instead of hunting for the gasket


after its bolted back on your all set



next before re-installing the trans, there is never a better time to install a clutch kit



so i did, hopefully i'll be throwing it in the jeep within the week. i just need to buy a few missing bolts for my motor brackets.
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