Swimmerboy2112
New member
Agreed. Not worth it IMO.
Auto to 5 speed swap, need your input!
- Thread starter Swimmerboy2112
- Start date
Agreed. Not worth it IMO.
Doc2012
Senior Member
While you are correct with the defunct wires that will need to be stores somewhere out if the way, there is a way to keep that CEL from being on.
It takes some studying, some creative thinking, and time, but if you can figure out which wires need to be connected to make the ECU think the transmission is in NEUTRAL, you'll be fine.
You won't get any CELs, and you'd be able to pass inspection, if you needed to.
Swimmerboy2112
New member
Yeah I got it about 3 weeks ago now. As you know, these are hard to come by in our area.
ChildrenOfBodom
Moderator
I disagree.
Wiring the neutral safety switch isn't going to fix it. A 3.4 auto ECU will definitely throw codes, there are missing solenoids and sensors. Those will be missing whether or not you're in neutral.
Here are some codes I found online of typical 5 speed swaps on the 3.4 using the automatic ECU:
P0710- Transmission Fluid Temperature Sensor Circuit Malfunction
P0753- Shift Solenoid B Circuit Electrical
P0758- Shift Solenoid B Circuit Electrical
P0773- Shift Solenoid E Circuit Electrical
Is there a way to manipulate the ECU into thinking the missing parts are there and in functioning order? If even a malfunction can throw a code, the readings must be very specific.. I don't see how it could be done without ridiculous amounts of extra effort, or a simulator of some sort. I'd start looking at 2002 Tacoma 3.4 5speed ECUs and try to get one of those to work, there's pinouts online and in the FSM, it could be compared and repinned if need be. I am unaware of differences maybe involved with throttle by wire or other Tacoma/4Runner differences, but that's a good place to start looking.
A great quote on TTORA from mosk
I think Toyota optimized the factory fuel and timing maps differently for the auto vs. the manual transmission vehicles, to meet CAFE requirements (fleet economy) and for emissions. That (and CA emissions) are the main reasons I want to do the ECU swap instead of keeping the auto ECU and tricking the computer. I've had enough of tricking computers. If I'm going to spend the money to convert this truck to a manual, I want to drive it with the right fuel maps, the right timing maps, and no CELs. Been there, done that.
-Jeff
Doc2012
Senior Member
WADR,
I didn't say the neutral safety switch.
Make the ECU think the transmission is in neutral.
This is from a '91, but same principle:
http://m.yotatech.com/showthread.php?t=101482&styleid=51
Swimmerboy2112
New member
Re-railing this thread for a moment.
Here's a list of what I have pulled for the swap, please let me know if I am forgetting something.
-Manual trans
-T-Case
-Shifters
-Shifter trim
-ECU
-Driveshafts
-Clutch pedal assy and all connectors
-Brake pedal assy and all connectors
-Clutch cancel switch
-Clutch (will be replaced)
-Flywheel (will be replaced)
-Master cylinder
-Slave cylinder
-Clutch lines
-Crossmember
I think that's it, right?
I'm still super confused on wiring. That's basically all that's holding me up right now.
Here's a list of what I have pulled for the swap, please let me know if I am forgetting something.
-Manual trans
-T-Case
-Shifters
-Shifter trim
-ECU
-Driveshafts
-Clutch pedal assy and all connectors
-Brake pedal assy and all connectors
-Clutch cancel switch
-Clutch (will be replaced)
-Flywheel (will be replaced)
-Master cylinder
-Slave cylinder
-Clutch lines
-Crossmember
I think that's it, right?
I'm still super confused on wiring. That's basically all that's holding me up right now.
Singtoe
New member
I think the easiest way to fix this is to Take an ohm reading of each solenoid and buy the equilivant ohm resister and wire it in.
The ECM will see the load on the circuit and think all is fine.
Do the same for the Temp sender. Find a ohm value for the correct temp and wire the corresponding resister in place.
Swimmerboy2112
New member
According to the Toyota Parts Cross-Reference, the part number 89661-3D140 (which is the number on my ECU) fits 1996-2002 4Runners. I think i'm gonna try it in my 97'
Singtoe
New member
So not true.. 2001 and 2002 4runners are drive by wire and that by itself would need a totally different ecu.
Swimmerboy2112
New member
So I thought, looks like my cross-reference is not reliable, bummer.
coinball
New member
This is what I would do. Also, I think the FSM has the resistance values published for the sensors/solenoids as part of the testing documentation.
zgensler31
Senior Member
Looks good to me, only thing I would mention is the drive shafts. Some have made the auto ones work, but you have the manual ones, you might as well use those, that's wgat I plan on doing.
Doc2012
Senior Member
Ok. So here's a question....
Your runner is a 97, right? The donor is a 96, right?
Why not just pull the ECU and The harness and put them in your truck?
Speaking from experience, it's not hard to do at all. Pull the intake off, and disconnect everything. Takes about 45 minutes to do.
As long as it's a 3.4, everything should plug together, except for MAYBE the injectors. But just swap them out and you should be fine.
Just my .01.
Your runner is a 97, right? The donor is a 96, right?
Why not just pull the ECU and The harness and put them in your truck?
Speaking from experience, it's not hard to do at all. Pull the intake off, and disconnect everything. Takes about 45 minutes to do.
As long as it's a 3.4, everything should plug together, except for MAYBE the injectors. But just swap them out and you should be fine.
Just my .01.
Jon
New member
ALL info needed for a 97 4Runner 5 speed swap. Wire details included and no ECU swap.
http://www.toyota-4runner.org/3rd-gen-t4rs/105258-5spd-swap-here-goes-nuthin.html
Keep the 5 speed t-case and use the 5 speed shafts and cross member. Easiest way.
I am still running an F1 Racing clutch but had to upgrade to stage 3 due to the super charger and the rock climbing abuse. Now it bites hard as hell!
Marlin Crawler Taco Box 4.7 is in the near future.
http://www.toyota-4runner.org/3rd-gen-t4rs/105258-5spd-swap-here-goes-nuthin.html
Keep the 5 speed t-case and use the 5 speed shafts and cross member. Easiest way.
I am still running an F1 Racing clutch but had to upgrade to stage 3 due to the super charger and the rock climbing abuse. Now it bites hard as hell!
Marlin Crawler Taco Box 4.7 is in the near future.
Swimmerboy2112
New member
Oh yeah I have them pulled I just forgot to put them on my list.
That's an idea but it seems like a lot more work than necessary. I'd rather just swap in the ECU.
Interesting. I read your thread. I see you stuck with the auto ECU. I am pretty attainment on using the M/T ECU.
zgensler31
Senior Member
Im planning on swapping the harnesses. Especially because there us a good chance you could fry the ecu.
Since the ecu is the rarest and one of.the more expensive parts, i wouldnt risk it. But its up to you.
Since the ecu is the rarest and one of.the more expensive parts, i wouldnt risk it. But its up to you.
Swimmerboy2112
New member
Hmm... Does the harness run behind the dash? If so, that seems like A LOT of work.
Doc2012
Senior Member
No. No it does not.
take the glove box out. You can see the ECU up in there.
the firewall on the passenger side, there's a little rubber boot.
the ECU harness exits the firewall, runs to the engine and trans. It has connnectors for the BODY harness, but the majority of it goes out the firewall.
hence why I said to change out the harness as well.
Disconnect everything from the ENGINE and TRANSMISSION, that's really it, and then swap in the manual harness.
Swimmerboy2112
New member
Oh good.
Yeah I already have the ECU out. Maybe I will swap the harnesses that seems like the best bet.
Edit: The more I think about it, wouldn't it just be easier to find a 1997 manual trans V6 ecu?
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