While changing the xfer case oil on my 90 XJ (189K miles), I discovered some pieces of chewed up oil pickup tube and the rubber connector from the filter sitting in the bottom of the xfer case near the drain hole. The oil was black in appearance. I flushed out any residual sludge and felt the chain (it didn't appear unusually loose). Everything is quiet before and after the oil change. I'm not sure if there is a piece of tube still connected to the pump or not. it appears the pieces I got out wouldn't make up a whole length of tube. I plan to pull the rear cover in place under the vehicle to investigate further.
Anyone know if the NP 231 pump and pickup tube are interchangeable with the NP 242? I know someone with one I can retrieve parts from. Also, any reason not to pull the cover versus the whole xfer case. While under the vehicle, the 2 upper bolts on the xfer case appear to be inaccessible without dropping the crossmember and possibly undoing the exhaust. (I prefer the easiest solution).
Also, I would appreciate any tips or advice from anyone that experienced this same problem. I've never seen this before. The only explanation I can come up with is a sloppy chain which dislodged the oil pickup tube.
Lastly, if the oil pump is non functional based on the pickup tube being dislodged, can the vehicle be run in 2 wheel drive near term based on oil splash from the chain alone?
Thanks
Anyone know if the NP 231 pump and pickup tube are interchangeable with the NP 242? I know someone with one I can retrieve parts from. Also, any reason not to pull the cover versus the whole xfer case. While under the vehicle, the 2 upper bolts on the xfer case appear to be inaccessible without dropping the crossmember and possibly undoing the exhaust. (I prefer the easiest solution).
Also, I would appreciate any tips or advice from anyone that experienced this same problem. I've never seen this before. The only explanation I can come up with is a sloppy chain which dislodged the oil pickup tube.
Lastly, if the oil pump is non functional based on the pickup tube being dislodged, can the vehicle be run in 2 wheel drive near term based on oil splash from the chain alone?
Thanks