I'm running an NP241 from a JK on a doubler setup. NP231/241. My first case burnt up the range mode fork and hub. Wrote it off as being a junkyard case that was run low on oil. Rebuilt it and it did it again. Rebuilt it again and replaced the whole main shaft and all parts from a cracked case I got. Ended up doing the same thing again. I bought another entire 241 from the JY, scoped the Internals before I bought it, looked good. Put it in, 4 wheeling trips later and it burnt up the range fork and hub. I'm at a loss. Drive train is a 4.7/Nv3500/NP231/241 SD60/10.5 with 5:38's and 40's. Shifter setup were free swing handles with mechanical linkages and now cable shifters. This last case was barely ever used in double low. Any ideas or seen this besides being run low on oil?
Thanks.
Thanks.