I'm a new '93 J30t owner ... purchased it last month through Ebay. It had almost 89K miles and I've put about 2500 on it. I've enjoyed driving it thus far.
Last week I had my mechanic drop the pan, change the filter and put in Mobil1 ATF. He said there was a little bit of metal in the pan.
Now, I figured I was probably going to have to replace the transmission within a couple years, but this is too soon.

It crapped out on me last night. My mechanic looked at it today and says it's history.
BTW, it was sudden failure. I'd had no problems since the work was done last week and no problems last night until that horrid "clunk"!
Are there any Infiniti dealers on the east coast that can come close to the Scottsdale Infiniti's price for a factory reman transmission?
For now, a sad J30t owner ...
Ken