Quote:
Originally Posted by shreve121764
I just changed fluids in the front and rear differentials and the transfer case. I let each drain until I couldn't wait any longer, but still was not able to get the full amount in that the owners manual states. I put 3 quarts in the rear and it was already coming back out the fill hole, the manual states 3.7 quarts.
Can any of these three fluids (F&R diff and transfer case) be overfilled? Will overfilling cause any problems?
I was surprised that the fluid in the rear and transfer case looked new, with 31,000 miles. The front looked slightly darker, but still much better than I expected.
Very little metal dust on the magnets.
I used Lucas synthetic.
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Sounds like you had a good gear oil change experience.
Did you jack up the axle as in Step#3 above? That should allow more to drain out.
How about the fill and test drive in Step#4? That would allow the oil to disperse throughout the housing.
About overfilling the gear oil. Normally the gears sit in a shallow bath of oil, so when action they spin through the pool and collect lube as they move. You would think that overfilling would mean more oil to go through and thereby creating more resistance. More resistance would essentially reduce the effeciency of the gears. But since the fill hole is set at the position it is, instead of being above the housing, it creates an overflow port. So overfilling while at an even ground level should be avoided automatically.