im doing a NP231J To Mod’ed NP231J Swap
Tools Needed:
Rachet Wrench
Sockets: 8mm 13mm, 14mm, 15mm, 19mm
14mm openend/boxend combo wrench
14mm racheting boxend wrench
this swap took me 6 hours (the nuts that hold the tcase to the tranny were a huge pain in the a$$ befor i made my own wrench)
the Mod’ed NP231J Tcase has a SYE, Wide Chain, & Tera-2lo
tcase Fluid
the first thing i did was suport the trans
next i remobed the bolts that hold the trans mount to the tcase skid (13mm)
dont for get to wright things down and to use ziploc bags and a sharpie
next i removed all the bolts that hold the tcase skid on (19mm)
next i removed the bolds holding the front driveshaft to the output yoke on the tcase (8mm)
next i removed the bolts that hold the rear driveshaft to the input yoke on the axle (8mm)
next disconect the connectorsfor the 4wd light and the speedo
dont forget to remove the wireing harness clips
necx remove the shifting linkage
next remove the trans mount off the trans (15mm)
remove the breather line off the tcase
remove the nuts that hold the tcase to the trans (14mm)
the pic shows i used a rachet, but i had to use a 14mm combo wrench, would recomend the ya go buy a racheting combo wrench
had to make a custom boxend wrench when the combo wrench was to long
after you remove all six, the case will slid off, rember it does wheigh 60lbs lol
tranny output shaft
getting ready to lift her into place
put the new case into 2hi and then slide the case on using the rear output yoke to alline the input shaft to the outout shaft of the trans
next its time to put every thing back
dont forget to use loctight, just incase
reinstall everything you just rmoved and the case is in!
i had to readdjust the shifting linkage… i just losend the adjustment bold (14mm) and shifted into 2 hi and retightened the bolt, and it worked for me
reinstall the tcase skid and your done
old tcase:
