Strong Resistance after Backing with 4WD Engaged

If your tires are the same size (equally worn) and you do not make any turns, driving with 4x4 engaged on dry pavement adds nominal stress and wear on the driveline. All components will be rotating at the same speed. It's only if you start making turns on dry pavement that you will start binding things up as rotational speeds will be different for different parts of the driveline.

 

All tires are identical and equally worn to approximately 40% - size 31 x 10.5's on 15. Semi-aggressive tread: Mastercraft's Courser AXT.

Over 130k of the miles on my rig are mine. 4WD I use intermittently each winter. I started this thread simply because I don't recall this issue occurring in past years.

I will say, however about the "wind-up," I had been ending my backing motion with the front wheels cranked hard over. That tension that stopped me as soon as I pushed the clutch in, well it also held true for moving forward.

That said, backing up straight reduces the amount of wind-up, but does not eliminate it. As I recall using 4-Low for creeping up onto 6" ramps, when finished I backed down off of them. This was the first time I noticed the problem, and it was straight forward then straight back.

Driving forward only while using 4WD, under any number of possible conditions does NOT cause this tension to occur. In fact, if I'm only using 4WD for driving forward, I'm able to shift into and out of 4WD effortlessly, on-the-fly.

Now, after reading everyone's thoughts on the matter, and doing a revaluation on my vehicle, I'm concerned about the front gearbox being screwed up. I'll share this interesting bit about the thing. Parked on 6" ramps, I topped off the oil in the front gearbox to the bottom of the fill hole. I do realize that after leveling out the vehicle will bring that oil level slightly higher. But will it be so high that oil blows up and out the breathe hose? Maybe. But this continued to blow oil until the oil level was considerably below the bottom of the fill hole.

What might, oil blowing out the breathe hose indicate?

Any other thoughts?

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Typically if you have oil blowing out, that indicates internal failure as far as I know. But normally youd have an abnormal noise. I still suggest you take it out and back up straight in 4wd and see if you still have an issue.