I believe I have the rarest transmission in a hardbody

[SaltyBeefCubes]

It's called an L3n71b and it's just gone out. I'm having a hell of a time finding ANY information on this transmission. All I know is that this trans was only made from 1986.5 to 1987 for the VG30i, it's a 3 speed, and made by Jatco. Even then, during those years of production, there were obviously many variants of the hardbody/pathfinder during those years making this transmission even harder to locate information on. Anyone know of interchangeable transmissions, where to locate a used one, or any other information? I'm about half way done pulling out the transmission and transfer case but I don't know if I'm going to be forced to rebuild it or if I can swap something else into the truck.

[Rev_D21]

I imagine you could swap for a v6 5spd or a 4 speed auto from any v6 truck from that time period. If you go auto you will likely need computers and harnesses from a donor truck. My father's 87 v6 Pathfinder had the 3 speed auto. It blew the pump seal and that was when my father got rid of it. Served him well for many years though.

[SaltyBeefCubes]

Okay awesome. I may look into the four speed, because this 3 speed has been a total nightmare trying to find. Even the junkyards don't have this transmission and there's like 15 hardbody and pathfinders at each.

[Rev_D21]

I don't understand why Nissan even offered a 3speed on those trucks. At 65 MPH the engine was working harder than it needed to.

[SaltyBeefCubes]

Agreed. Perhaps that's why the trans is only used for 1.5 years. When it comes to s a 4 speed swap. How "difficult" is it. Is it simply swapping the ecu, and wiring harness and that's it? Or is there a lot more that I can run into? I am somewhat mechanically inclined and have swapped and pull transmissions before