I think if I were you I would find another dealer.
My truck had less than a 1000 miles on it when I drained and refilled both diffs. You shoud have seen what came out the rear one. And, what was on the magnetic plug. Both now have syn. 75w-90 in them.
From reading this forum I seem to have seen reference to some dealers using a machine to change the fluid in the transmission by pumping in new fluid as the old is pumped out. Don't know anything about this method but I did use the "hoot" procedure to change mine to Transynd a few weeks ago. I also changed the transfer case at the same time.
I just can't believe a dealer won't drain and refill your transmission. At least you would get new fluid for the major portion of the system. And, draining and refilling the transfer case is probably the only way to do it.
My truck had less than a 1000 miles on it when I drained and refilled both diffs. You shoud have seen what came out the rear one. And, what was on the magnetic plug. Both now have syn. 75w-90 in them.
From reading this forum I seem to have seen reference to some dealers using a machine to change the fluid in the transmission by pumping in new fluid as the old is pumped out. Don't know anything about this method but I did use the "hoot" procedure to change mine to Transynd a few weeks ago. I also changed the transfer case at the same time.
I just can't believe a dealer won't drain and refill your transmission. At least you would get new fluid for the major portion of the system. And, draining and refilling the transfer case is probably the only way to do it.