I just purchased a 05 frontier nismo 4x4 with automatic trans & i am having some issues with the transmission. No coolant contamination & actually the previous owner just had the trans rebuilt only 14,000 miles ago for the tune of $4600 bucks according to the receipt i have which is crazy because when i dropped the pan it sure didnt look good in there? Anyways i ordered a new valve body & really hoping that fixes my problems but im not to sure it will since while i had the pan off i pulled the valve body off & cleaned it all up & checked it out & didnt find any broken pins/wires whatever they are that run to the solenoids. All the solenoids came out easily only thing i could find that i thought would have been causing my issue was a bunch of metal shavings (very fine) all over the valve body electrical stuff & maybe causing them to arc across each other? Although after cleaning everything up & reinstalling it im still having same issues which is or actually has been changing since i got it? When purchasing it the trans was supposed to be fine especially since po just spent 4600 bucks to have it rebuilt which btw wasnt fron coolant contamination? Not sure why but it did have cel on & when i first looked at it i ran codes & saw the trans code i forgot what exact code it was but trans was working fine? Then about 3 weeks or so later i ended up buying the truck for a decent price (since i was worried a out the trans) & i met the guy about 45 min away from my house which was halfway so he had already drove 45 min & on my way home when i got off the freeway i noticed it was stuck in like 4th gear which since then i read was a limp mode. Anyways so i got it home after it cooled down i drove it & it was shifting fine again? Ran the codes & it had 11 trans codes! The first code was u1000 so i was thinking that was probably why so many other codes? Checked fluid & it was nasty especially since it only had 14,000 miles since full rebuild? So i changed it took it for a spin & trans now would slip if in 5th unless i ran with od button off? Fluid was still nasty so i changed it again & actually seemed to get even worse & occasionally now wouldn't go into reverse? Started reading online & read that the valve body could need replaced so i ordered one (hasnt arrived) & since im impatient i decided to pull my valve body out & check it out. When i dropped the pan there was tons of metal shavings on the magnets & everywhere really never really found any bigger pieces just mainly fine metal shavings. Cleaned the vb all up put it back in & still having same issue? I know i should wait for the new vb & see if that fixes it but since i didnt really find anything obvious with the one in it that looked bad im not sure its gonna help. The only code im getting now is p1716 but even before this all started if i cleared the codes it would take a while for them to come back & i haven't driven it much since i dont wanna hurt it anymore until i try the new vb. But the lil i did drive it actually will shift fine as long as i leave the od off & when its still cool but when trans gets up to temp then it will go into 2nd gear limp mode & reverse wont work? So i have been looking online for used trans just incase the vb doesnt fix my problems & i keep reading diff info on what trans are interchangeable? Ive read that any 05-12 2wd or 4wd trans will work just need to unbolt the tailshaft housing & swap it over but that the shift points & tcm might not work right (but i figured i could use my new vb & hoping that will take care of those problems? ) then ive read that the 2wd trans wont work or at least not without pulling the trans all apart to swap the output shaft or smthen not too sure? Also my truck is a 4wd nismo with locking diff & when looking at trans i see alot that say "without locking" does this mean i have to find one with locking? Is ther any difference in the trans or is it just a electronic thing & if so could i just use my new vb? Srry for the long post but i wanted to give as much info as possible just incase anyone else has had similar issues & might be able to help point me in the right direction? Also i apologize for my grammer or punctuation i guess it definitely could be better. Thank u in advance for any advice or info i very much appreciate it!