I'm going to be doing my first 3.4 to a340h swap. I'm curious about what transmission codes you had after completion. I was origionally thinking that I was missing a speed sensor but after looking the 340f and the 340h have the speed sensor in the same location.

I'm just trying to get an idea of what need to be changed before I mount up the engine to the tranny.

thanks

 

Brian aka "thefallman" and the "teamshiftpoint" guys are the only ones that I know that have put an A340H behind the 3.4 (but there may be others), and Brian is the only one talking about how to do it. "teamshiftpoint" considers it confidental info since they are in the business of making money off the swap.

I just recently asked Brian how he did it and this was his response:
Good luck, let us know how it goes.

 

I have not seen "thefallman" on recently. He lives close to me now that he moved from Washington.

I know I can make the soleniods work, I though I read that there was also a code while running the 340h?

I was also going to swap the T.V. cable, for heat sheilding. This looks to be not needed though.

Manual swaps sure are easy, sheesh.

I'm having a little trouble finding an engine this time though. I might have to get it from a junk yard

Thanks Dale

Edit: now that I know his name search might turn up somthing now

 

You can reach Brian by PM, that's what I did. I'm interested in the subject because I still have a good A340H from my 3.0 and I hear the newer A340F OD has some weaknesses (especially behind supercharged engines).

 

Im going to be attempting the 3.4 and 340h swap at the end of the month. Im am doing this just to get it running. Eventually I think I would convert over to the 340f swap just because it would be a stronger drivetrain like a grear driven instead of the chain.

 

Well after looking in the FSM I found that both trannys use an outputshaft speed sensor. I was worried that the 340f also used a direct clutch speed sensor(like in the tundras 340f) but it does not. Also there are 4 soleniods with the 4th solenoid being for low range. A simple wire/relay setup sould allow the low range solenoid to function. I will have to "pinout" the park/neutral switch and use the one that suits my needs the best, I"ll have to update later on this.

Now I'm curious what Teamshiftpoint sells. Is it just a valve body modification for higher pressures?

I'll have an update in a couple of weeks after buildin my harness and exhaust.

 

I will be watching closely...I want the same setup

 

im here guys just ask me any questions

Ive done everything that Muds doing. and i can steer you clear on a few things.


There are 3 speed "sensors" on the 340F and 1+1+1 on the 340H

the 340F has a speed sensor in the same place as the 340H in between the transfer case and the transmission

it has 2 more on the tail output shaft housing one of these is the electornic speedo sensor


The 340H as noted above has its only real electronic speed sensor inbetween the tranfercase and the transmission.

It has another the cable driven speedo sensor on the tailshaft housing

and the third isnt actually on the transmission its on the back of the speedometer in the dash.


Mud Email me and ill send you my phone number im more then willing to help you out. i love working on toyota's. HEEPS I HATE ill trade a 93 Heep Grand Cherokee to anyone for a second gen 4runner. preferably 91 or 92. just use the email link on my profile. i dont want to put my email in here cause of spammers.

Oh btw i can give you the link so you can get all your wiring diagrams online to mud.

 

Some of the A340Hs have an electric speedo sender here (my 93 SR5 model did):


It looks like this:


Brian is the sensor at the back of the dash maybe just to convert from a mechanical cable to an electrical signal for the gauge? If so, maybe the SR5 models don't have it?

 

no actually its a sensor that sends a signal to the 3.0 ecu on the 3.4 this sensor was moved to the tailhousing on the 340f. there are actually 2 sensors on the tail housing usually from what i could tell. this shows up in the wiring as well. this sensor on the back of the speedometer gauge is a backup VSS to the one that is located directly above and to the right of the solenoid wiring harness on the a340's

 

I will shortly be making another conversion harness for BAMF_2004 and when i do this i will post the wiring diagrams that show these sensors

Here is a pick of the Primary Vehicle Speed Sensor as far as i was able to determine primary and secondary.

Red Arrow points to VSS

 

here is a very informative article that BAMF_2004 brought to my attention and confirms my theorys about the VSS's and also about the T/Case No 4 Solenoid being used by the engine to control the shift point into and out of 4 low at speeds below 18mph according to the article but according to the FSM its 35mph.

Although the VSS on the back of the Guage Cluster is Labeled No. 1 it is in reality the Secondary VSS. and the Primary VSS is the one on the transmission inbetween the T/Case and the Tranny and is Labeled No. 2.

http://www.autoshop101.com/forms/AT10.pdf

 

You can put a gear driven t-case behind the 340H now with this adapter:
http://www.pirate4x4.com/forum/showt...fer+case+mount

Here's a little history on the A340:
http://rigs.corequipment.com/Cebby/9...20Transtec.pdf

 

Has anyone or does anyone know someone beside inchworm who had installed the gear driven tcase behind the 340h on there own? Is it as easy as it sounds? Thank you mt_goat for the link

 

anyone else think that there ought to be a dedicated forum for 3.4 swaps???

 

I agree

 

Why? Are all those 3.0 headgasket/rebuild threads bogging you down, hehe.

 

well it would be nice to have all 3.4 swap info consolidated into one forum where you wouldnt have to put your hip waders on in order to find what you need.

 

I would think that it would be a good idea to have a dedicated topic for the 3.4 conversion, based on how many of us have done them, and how often the subject comes up from new people interested in it.

 

hey man how did yours turn out are you done with it yet or not? any problems?