6 speed from Altimas and Maximas. Some have limited slip differentials (HLSD) while most are open diff.

Sentras also got a 6 speed but it won't bolt on without swapping the case (bell housing).

The gearing and/or final drive is different depending on the application so pick one that works for you if it matters.

 

Kinda figured that, now my main question is will I be needing the ecu off a manual?

 

No, a re-flash will do it