Member
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Join Date: Mar 2017
Posts: 60
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Member
Join Date: Mar 2017
Posts: 60
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I’ve also wondered the same. Having the lever type transfer case with the ability to disconnect, I would assume the transfer case is active in 2wd, thus your fluid is circulating in the TC driving the power to the rear wheels, which probably is a good idea to drain and fill every 30k.
Now if you were in 2wd with the drive selector in neutral, you are still engaged at the TC, just not the transmission. Or if you were in D but the TC is in neutral, you wouldn’t go anywhere since the TC shift lever is in “N” position. (Don’t think anyone would ever be in the drive position with the TC in neutral, knob type TC selector doesn’t have “N” position, SR5, Limited)
I’m planning to drain and fill the TC at 30k with Ravenol 75w. Most people on the forums that have reported draining their TC at 60k ish seem to have relatively clean fluid, but still shows signs of use. I guess it also depends if you use 4wd often.
Someone correct me if I’m wrong....
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