Hello everyone, Happy New Years. Long time 'lurker', first time poster, great tech info here which has helped me greatly in the past.
First, my apologies if this has been covered, I did search but couldn't find anyone describing the same symptoms previously. My brother owns a WD21 and as the resident "mechanic" in the family I'm forced to fix it for him, but being a Nissan guy at heart I don't mind working on it too much. Anyway I'll try my best to reiterate second hand the problem. It's been a very mild winter here in Wisconsin this year, we just got our first measurable snowfall today and of course he didn't think until now to try the 4WD. The main issue appears to be the vehicle wandering or pulling, mainly on wetter portions of the roads whereas snowcovered don't seem to be as bad. I suspect one of the auto-hubs is not engaging, thoughts?
Also, this one has me scratching my head. He also said he had a "one time" issue backing up while in 4WD Hi, what he described as a "sputter" and then finally engaging. Am I correct to assume 4WD disengages when in reverse automatically? It's not an issue while in 2WD, so I'm hoping it's not a trans and/or transfercase issue.
He'll be coming over tomorrow for me to check it out but I'd like to get some ideas prior. Any input is much appreciated!