Hey guys I�ve got a 2008 G35 Sedan AT and im looking at swapping a manual from another 08 G35 sedan, I�ve done a lot of my research but im just wondering if anyone�s done it before. I know how to do all of the mechanical work and I have the benefit of free labor since I work at a shop so im not worried about the time it�s the electrical part im curious about. I know the 6MT has a reverse switch and a neutral switch that needs to have power going to it but is a flash necessary for the ecm after cutting and splicing into the stock AT transmission harness. And will it throw codes after install. I appreciate any advice other than �just buy a manual� I�ve got a ton on money and time invested and it�s my 1/4 mile baby. I wanna go manual cuz my stock torque converter isn�t cutting it anymore.

 

Yes you either need to flash it for the manual swap with Uprev or swap in a manual trans ECU (which would also require you to either flash it with Uprev to bypass NATS or have the dealer program the keys)

I've done this a bunch of times lmk if I can help

 

Cool bro I appreciate it, I�m actually on uprev right now tuned by admin. So the only wiring is to tap into the wires for the neutral switch and reverse correct? All the other wires on the stock connector gets cut? Have you have any check engine lights on after doing this? I appreciate the reply.

 

You'll just need to get retuned after then either by myself, admin, or another tuner. If its done correctly you should not have a CEL

 

cool bro I appreciate you reaching out. Now I just gotta hunt down the parts, it�s proving difficult to find the clutch pedal assembly for this specific year�and the transmission other than from Z1.

 

Does anyone know the difference between the different types of HR manual transmissions. I�m seeing some say cd05#1 and some say cd08#1 are they just different variations of the same trans?

 

Nissan part number 320B0-JK41B, you can buy a new one directly from Nissan for like $2500 right now, strongly recommend you get a concentric slave delete kit for it.

This is not the same transmission as the CD00# transmissions for the DE engine, lots of different parts, input shaft, bellhousing, etc.

 

yeah I know the de trans have the whole fork assembly but doing my research I�m seeing different types of HR trans with different numbers including some that have the rev matching feature. I just don�t wanna buy one and not be able to use it because I was told I can use any HR/VHR tranny to bolt to my 08 G35 sedan. And yeah you�re right I know the csc is an issue.

 

Synchro rev was an ECM feature basically, the ECM monitored the transmission gear and would bump engine rpm a lot if you went for a numerically lower gear or just hold at a certain rpm if you were going for a higher gear.. This was also only available on the VHR engine, not the HR engine. The synchro rev has an electronic bit installed on the top of the transmission, the non-synchro rev just has a blank plate, you can turn the transmission into a synchro rev by adding the sensor to one that didn't have it however for it to work it also requires the ECM, the disable button, and I think they used a different instrument cluster which is what actually tells the ECM to bump rpm.

 

As for putting the 1EA0A transmission behind an HR engine, yeah I think those bellhousings were the same, you just wouldn't have the synchro rev match function. Not 100% sure about the input shaft spline count but you should be able to find a definitive yes or no answer by searching the internet. Probably won't find a ton of info here on G35DRIVER though because our cars never even came with the VHR or the 1EA transmission.

Also, the JK transmission for the HR engine never had a part number revision but I'm pretty sure the 1EA0A did.

 

Question, regarding the sensors on the clutch pedal. If I�m wiring the neutral and reverse switch on the mt trans, do I not need to wire up the sensors on the clutch pedal? If the transmission is saying to the car that I�m in neutral then I should be able to start the car while just holding the brake pedal while in neutral correct? Or am I hella wrong lol?

 

The backup light switch on the transmission isn't part of the starting circuit, the PNP switch on the transmission is monitored by the IPDM. You need the clutch switch, that's what closes the starter relay.

EDIT: Brakes have nothing to do with starting on the 6MT, that's a 5AT only thing.

 

So how would I wire up the switches on the clutch pedal? Possible Diagram?

 

Start with the V35 schematic since they actually have one line diagrams. There isn't much difference in overall function between the V35 and V36 chassis. Then look up the V36 car for which wires actually do the thing.

For example, here's a V35 schematic 6MT one line from section SC - Starting/Charging. You can see the IPDM computer needs the PNP switch on pin 50 wire color B/R black/red stripe. Also IPDM start relay needs the clutch pedal switch on pin 53 GY/R grey/red stripe. The clutch pedal gets it's power from the ignition relay in the IPDM pin 25 G/Y green/yellow stripe.







Compared to the V35 5AT wiring schematic where the TCM sends the PNP signal to IPDM pin 50 and the start relay command is also controlled by the TCM start relay.





So using those V35 one line diagrams as reference we compare to the V36 chassis it's very similar the 6MT clutch switch goes to IPDM pin 30 GR grey wire, or the 5AT TCM controls the same wire. 5AT and 6MT PNP power comes from the IPDM pin 109 (G green wire for 5AT or BR brown wire for 6MT) the 5AT would then send PNP info via CANBUS to the IPDM whereas the 6MT switch needs to go to IPDM pin 73 P pink wire.

 

One big difference is the V35 the PNP switch is just a ground source reference monitored by the computer in the IPDM, on the V36 it's actually an energized source. Both use the clutch switch as an energized source to power their respective relay.