TCU and line pressure questions

[RCWD21]

Ok guys with the wealth of knowledge on here I'm sure someone knows the answer to this. I have a '90 pathy and since the rebuild on the transmission and even with a shift kit installed I'm still unhappy with it. The sloppy shift from 2nd to 3rd gear is acting like a slipper clutch. I can put it to the floor and either 2nd gear or 3rd gear grabs but slips and I hate it. I'm going to replace all the solenoids and I've unhooked the resistor behind the battery and its helped a bit for now until I can get the new solenoids. But here's my main question, is there a way I can increase line pressure for good and is there and differences in the later year TCU's in the pathfinders? Does say the 94 year TCU have a different shift map than the 90? I don't have a problem experimenting and I can certainly deal with firmer to harsh shifts. I just want this thing to be as bullet proof as possible. Any help would be great and I hope someone comments soon lol

[RCWD21]

Anybody?

[adamzan]

Not sure, I heard there are two shift kits, one is more firm than the other. I looked into this a while ago, but I have an xterra trans in mine now, no slip between any gears.

[RCWD21]

What year xterra tranny did you get? I've heard and read mixed results. I think it was from 01 and up? And for now since this transmission is in good working order I want to get it to work as good as I can. I mean $85 for brand new solenoids is a steal lol and I wasn't aware that there was two shift kits? With mine its not so much slipping as it is a long shift period between gears. To me it feels like either the solenoids are weak or the TCU is failing. I looked at it and it has been "rebuilt" by someone. It doesn't say who. The sticker around it just says "rebuilt by an independent rebuilder. Warranty void if opened"