xterra312002,
If I had the symptoms you describe, the first thing I would do is swap out the fluid. I'm wondering if Nissan swapped it out with something incompatible like ATF eek
Bogatyr
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2001 Nissan XTerra XE 40k
1984 Honda CRX 1.5 83k
1970 Land Rover IIa 88" 41k
1966 Land Rover IIa 109" 35k