1988 4x4 22R drivetrain swap to automatic

I have a 1988 4x4 with a manual transmission. I have a spare parts truck auto trans

The drivetrain on the parts truck is solid, and the wife would like to convert to automatic. I believe a full drivetrain swap would be the best way to go. I assume the ECU needs to be swapped, and possibly the rear end diff?

If anyone has done the swap, let me know, or if there is a link to a discussion on this type of swap, please share. Thank you very much

 

I haven't done that swap, but have engine/transmission swapped my 4Runner (originally automatic, and always staying that way) twice, and worked on a friends 4Runner which was swapped from a auto to manual.

There are quite a few wires for the automatic transmission running all through the truck. There are switches/sensors/lights on the pedals and gauge cluster, and shifter area. The ECU controls the transmission, so obviously lots there, and down to the transmission itself.

The easiest way would be to pull both dashes and swap the entire bulkhead harness. Or, get really familiar with the electrical wiring diagrams, and you can probably recreate much of that, at least enough to function, in the new truck.

Big project for an A340H, which is the transmission that gave Toyota autos a bad name. The A340 is a good design, but the electronics on the early ones are very primitive, and the hydraulic transfer case is a major power-robber.

 

Okay thank you very much. Still feeling this one out.