2-4 select to j-shift conversion help

Howdy! I'm sure I screwed this up, I'm just not sure how. I recently swapped out my 2-4 select transfer case for a j-shift transfer case. And now my 4wd light is flashing no matter what position the transfer case is in.

I put the truck in 4, disconnected the battery and did the swap. Everything went fine. I packed the 6 pin with dielectric grease and wrapped it with electrical tape, connected the 2 position switches and hooked up the battery.

Ive been scouring for insight from someone else who's already done this, or from some of the other transfer case posts, but my brain is mush at this point. Is there anything else that I should have done? Thanks in advance.

2004 extra cab trd now has a 1997 4runner transfer case.

 

Does it still shift into 4LO/4HI? If so, its your connection or switch. Check the switches again. Make sure the connector is firmly seated.

 

The transfer case will move through and physically engage all the positions. I'll double check connections and test voltage.

 

In theory, I shouldn't need to do anything more with the 6 pin actuator plug right?

 

I don't believe so but I don't have an actuator so can't say for certain. If the transfer case position switches check out, then it could be a problem with the 6 pin connector being packed with dielectric grease (?).

 

Why the swap? 4wd not working?

Lets start with the basic, your 04 should be ADD with an electronic clamshell actuator and your push button 4wd H/L tcase should have an actuator as well. You convert the tcase to a J pattern case? Did you convert the front to manual hub or did you do the hose clamp mod in the ADD tube?

If all you did was convert the push button to a J pattern case, your 4wd will no longer function. There's no way the front ADD will receive power from the tcase to tell the ADD actuator to engage the clamshell. The flashing 4wd light is telling you that you're not engaged in 4wd because its not senseing 1) the tcase actuator or 2) the clamshell actuator.

 

@02hilux. All I did was swap the transfer case. No other mods, driveline wise. I don't know if I could do the vacuum line, because I don't think I have one.

Do you think I might be able to create certain links between some of the connections on the plug? I had been of the impression that I would only need to make sure the position switches were correct and connected.

 

For instance, if I were to get the actuator side (male, to plug into the harness) and connected a wire from a constant load pin to another point in the connector, could I trick the ecu into thinking the actuator is in place, so that it would just read the position sensors?

 

Wire up a switch. https://www.tacomaworld.com/threads/toyryd04s-4x4-conversion.442349/#post-24003181

 

Oh boy! That was a rabbit hole of information! I'll get back when I reach a conclusion. Thanks.

 

Without looking at the schematics for both vehicles it only takes one pin difference.

So many harness differences between 4Runners and Tacoma`s through in different years

The 97 4Runner is set up for Vacuum ADD the 2004 is all electric How did you work this out!

 

This is going to be real interesting .

Going from vacuum Add to all electric different vehicles even more fun.

 

I saw 2 vacuum line points on both transfer cases. Top, from the selector to the transmission. Side, to the actuator on the 2-4 and capped on the j-shift.

The 2-4 has 4 harness plugs total. The main 6 pin, a speedo connector, a 4 high, and a 4 low sensor.

The j-shift has 3, speedo, the 4 high, and 4 low.

My thinking is that since the add is electric, it just needs the proper circuits to connect. From what I've gathered it is supposed to see that the vehicle is in 4 to engage, and abs causes it to disengage. Apologies for not including links, but from looking at the wiring schematic, pins 1&2 run the actuator. Pins 3&6 alternate between each other and 4(ground) to tell the ecu what position the actuator is in. Pin 5 doesn't get listed and I need to figure that out.

I think the separate switch idea is close to what I'm looking for. I'm just not sold that it would be my only option at this point. I'll test connections and play around with it this weekend when I have the time.

But, all my thinking might be completely wrong.

 

I'll run what I'm thinking past you guys, and hopefully you can point out where I'm wrong and what I should look at instead.

Assuming that the vacuum lines aren't an issue, the sensors are working and connected properly. The issue is the 6 pin actuator connection.

Completing a circuit on pins 1&2, to replace the actuator motor.

3&6 need to be connected to 4 with a switch of some kind.

Pin 5 is blank.

From what I've read in a posted wiring diagram, you can shift from 2hi to 4low on a 2-4 without pressing the button on the selector.

What do you all think? Is the hard part going to be the switch? Or do you think I'm missing something.

 

I might have figured it out. Latching relays! I'll update if I can get it to work.

 

Not sure if this will help, or if you still need help, but found this while down the twin sticks rabbit hole this afternoon.



and a link to the article, which has some other useful factoids as well.

https://adventuretaco.com/swapping-the-transfer-case/

Post your solution when you find it!

cheers
D

 

Well, nothing completed yet. I couldn't figure out the logic for relays. So now I'm trying to assemble a smaller version of the actuators electronic connections. I've got a 18rpm dc motor, a sp4t rotary switch, and I'm waiting for the shaft couplers to arrive. Then I'll wire it together, try, then encase and mount it somewhere other than under the vehicle.

 

Just completed this on my truck. It’s not terribly difficult, but there are some other components that you need to change out. Quoting my own post below from a similar question someone posted in another thread.

 

I was just thinking about checking the wiring schematic and seeing if instead of working with the end connections, trying to change things before the ecm.

 

So installing a position switch and wiring in the Transmission Control Relay is it?