A340F Transmission Compatability

Hello everyone, I’m in the middle of converting my 2001 Prerunner to 4x4. I bought a 1996 4Runner trans (a340F) just assuming it would fit since it’s A a340f and it is the kick down cable version. I bought a new filter and when I went to install it I realized it different than the Tacoma one I ordered. Is this a different transmission? I couldn’t find much info for my truck only the 2004 electric shifted and 2nd gen trucks. On pick a parts website it lists the trans as a interchangeable part. Anyone know if it is going to work? I’d hate to pull my trans and not have something to throw in there. Thanks in advance!

 

Yeah believe it or not the filters are different between the two, even the A340E and A340F have different filters despite being the same transmission except for the output shaft. Take a pic of the sticker on the trans.

 

Unfortunately the sticker on the top is all dissolved. The plate on the side is the only thing I have.

 

Show me what the tail section looks like. Where the transfer case goes.

 

I’ve done this PreRunner/4x4 swap myself so you can ask me anything about it.

 

Here's some pictures I took of the transmission and tcase. It is a 4 runner tcase but its a j shift so I am hoping it works (fingers crossed).

 

And I do actually have a question for you, I have all the stuff to do ADD in the front, but I was hoping to do manual hubs. Do you think its worth the extra time and money finding new knuckles and axles for the swap? Or just stick with ADD since I have it all?

 

You are fine, that is a J-Shift transmission. Do you remember what engine the donor vehicle had? You might have to swap bellhousings. The only difference I can think of is that the VSS is cable driven instead of digital. In that case you have to buy the adapter from Low Range Off-Road.

Additionally, I'm 90% sure most of those sensors are different (Park/Neutral, transmission temp, etc.) Don't worry - just swap the ones from your A340E. The only wiring mod you'd need to do is to extend the wires for the VSS plug. The VSS on the A340E is on the transmission body, and the VSS on the A340F is on the transfer case. I had to extend mine 6" inches.

The transmission filter changed throughout the life of the A340X series transmission. Try to fit the one you have into the pan, if it doesn't work order one for a 4Runner.

All these transmissions are the same, the A340E, A340F, and A340H. Only things that changed were the transfer cases, output shafts, bellhousings, etc.

 

Entirely up to you. Most people do not run ADD because all of the wiring and vacuum lines you need to run.

Manual Hubs are purely mechanical and will make your swap 10 times easier.

 

Ok, that makes since, do you know if the valve body changed between the two by any chance? And it came off the 3.4l luckily so it will swap over.

 

Also it looks like you're leaking from the transfer case shifter flange. Find out if it's the boot that's bad, or the gasket maker that's gone bad.

 

Probably the same, I don't have a good answer for you. The only time the transmissions became different was on the 03/04 v6 transmissions that had the ETCS-I system. There was no kickdown cable.

 

That was clean when I bought it, I flipped the tranny upside down overnight to pull the pan and the gear oil seeped through. I am planning on replacing that boot though

 

Gotcha, thanks for the help, I appreciate it!

 

I just wanted to post a update here incase anyone wants do do something similar in the future. The valve bodies did change, there are 4 different types of valve bodies in these transmissions. However you can swap them between transmission housings with no problems. Including swapping from a electronic controlled valve body to a kick-down cable valve body and vice verse. I bought a 4Runner transmission that had a older short valve body with the tubes that connect the valve body to the transmission case. I was able to swap in my newer long valve body that has the tubes cast in as one piece. Even though my valve body was from a prerunner you can buy a 4wd filter and run the deep 4wd pan. As far as I can tell the newer valve bodies were made to fix some issues with passages leaking so I was glad I could use my newer valve body from the prerunner trans. I ended up rebuilding the entire transmission and transfer case so I could be sure they were in good condition and would last a long time. For anyone contemplating swapping output shafts on these transmissions, if you have a good transmission with low miles I would highly recommend swapping the output shafts. It is not as difficult as it’s made to seem on here. The hardest part of the whole thing is simply getting the transmission in and out of the truck. if you follow a tear down and rebuild manual you can swap everything over in about 2hrs. Make sure you have some long flat head screw drivers and some good snap ring pliers. They really make a huge difference.

 

Below is the page from Transgo to help identify which valve body you have.


Below I have drawn in the tubes one the older design to show what I mean about them being cast into the newer style.

 

Will a 2003-2004 tundra a340f transmission fit the first gen tacoma with the exception of swapping the bell housings?

 

Not sure.

 

@gearcruncher

 

Hello I’m curious if the A340H (1995 4runner 4x4 A/T) transfer case fit onto a A340F transmission (1997 4Runner 4X4 A/T)?? I’m looking too so a SAS and need the front drive shaft to feed on the passenger side from transfer case>driveshaft>Solid Axel