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Old 06-06-2007, 08:41 PM
90-MyXJ 90-MyXJ is offline
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no transfer case fluid change ever

Hi;

After driving my 90 XJ (4.0L, AW4), with NP231 transfer case, for about 270K miles, I learned that the TC fluid needed changing even though the truck has been in 4WD only 3-4 times in her life. Like a dummy, I wrongly assumed that if I don't use 4WD I don't need to change the TC fluid. I drained the black fluid and 1/2 quart came out. I refilled with fresh DEX III and Seafoam Trans Tuner, drove for a week, and changed the fluid again. This time the fluid was all red.

Since the vacuum disconnect on the front axle is all shot up, I can't test to see if the TC and the 4WD work.

What damage could I have caused the transfer case becasue of running without fluid change for such a long time? Should I assume the TC is all ruined?

TIA for any clues ......
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