3 spd ---> 4spd swap info

[adamsautocare]

I have been doing a little research to get a parts list made up. I have an 02 prizm that has a 3spd auto. I am looking to swap a 4spd auto. I work in a shop and have a lift, tools, etc. Is there anyone who has done this swap that has a parts list? Obviously I need a transmission but what else?

Thanks again and I will also keep searching.

[Buurin]

105 did this exact swap. Search for his post.

[dorman68]

You will most likely also need to find and engine wiring harness and ECU/PCM from a car with a 4-speed auto trans.

[105]

I've been meaning to put together a summary/write up. Let me know if you have any questions.

This is from my write-up/summary that is in progress:

Parts:
-transmission
-ECU
-rear transmission mount (mounts to driver side of frame)
-shifter cable bracket (3 speed bracket will not work)
-OD solenoid harness connector (3 pins, 3 new wires) - find at bone yard
-gear switch harness connector (7 pins, 2 new wires) - find at bone yard
-other connector pins under dash***
-shifter w/ OD switch (optional) - I didn't use this
-axle seals (optional), be sure to at least inspect the seals

***Here is the link to Buurin's wiring write-up. Electric wiring for3spd-> 4spd swap
You'll need to either harvest all the pins or entire connectors mentioned in his write-up. There are several different size pins in all the connectors. Don't be like me and have to make several trips to the bone yard to figure this out. You cannot buy these pins ANYWHERE!!! Your only other option would be to find a complete engine wire harness and its sure to be very expensive from toyota.

I did my swap for under $200 including a new flex plate because mine was destroyed. Not including fluid and filter.