I just completed the swap for a np242. The np242 was out of a 92 xj, and my np249 was a post 94.5 with the internal slip yoke, so I did keep the front half of the np249 and it input gear and used all others parts from the np242.
Everything went quite well and I didnt had unpleasant surprises, but I do have some questions :
On the np249, the 4wd switch is on the front part, and it engages only when the shift sector is in low. On the np242, the 4wd switch is on the back part, and it selection depends of the shift rail position. I did reconnect the 4wd switch of the np249 front half, because the connectors where not the same. With my sepup, is it right to say than even if I switch the plugs behind the vic, it will never display the "part time", "full time", and wheels powered? Can I use the np249 switch in the np242, even if it doesnt have the same connector?
Secondly, (and this is my main concern): I did used the speedometer assembly from the np249... I guess this was not right because now my speed gauge is not working at all and my transmission is not shifting. Please tell me than the transmission is activated by this reading of the speed and that I did not ruined it... Here again, I did used the speedometer assembly of the np249 because the connectors where not the same. Can I use the pinion gear and the adapter of the np242 with the speed sensor of the np249? if not, what are my options?
Finally, I did test drive it at low speed and I would like to know if this is normal to get some "binding" with this transfer case? It did hop a bit when doing prononced turns...
Thanks again for the help !
EDIT : Ok, after some more research, I probably didnt rotate the speed sensor corectly to engage the gears together. I also read than this is normal to get binding with the np242 on 4wd part time and 4wd low, and that theses options should never be used on pavement. My first question is the only one remaining, can I use the np249 4 prong plug 4wd switch in the hole of the np242 (reaching the shift rail)?
Last edited by Oli; 11-23-2010 at 07:50 PM.