2nd gen 7AT to 6MT swap

illestFX35

illestFX35

Member
Car
2010 FX35 RWD
Got a good deal on either the 350z HR JK41B tranny or the 1EAOB 370z tranny from a local Nissan dismantling shop. 5AT to 6MT are super easy to do for the DEs using Auto wiring harness... have yet to see a 7AT to 6MT though.

Will also need a clutch/flywheel/pressure plate kit, slave/master cyl, fluid resivoir, clutch lines, 6mt driveshaft, Clutch pedal assembly, and ebrake conversion and thats about it.

Will keep updating this thread on more reasearch I find.

Hopefully the stock 7spd FX wiring will work like the 5AT fingers crossed...
 
If they have a differential from one of the AWD versions, they have a taller set of gears.
Not LSD, literally,but Traction Controls might still work...

I’m going to watch this one.:cool:

I’ll bet you can get most of what you need from a scrap G37, 370Z, perhaps even a frontier.
 
Old Blue said:
If they have a differential from one of the AWD versions, they have a taller set of gears.
Not LSD, literally,but Traction Controls might still work...

I’m going to watch this one.:cool:

I’ll bet you can get most of what you need from a scrap G37, 370Z, perhaps even a frontier.
Click to expand...
Most likely I will use a G37s 6mt driveshaft to a G37s 6MT VLSD (3.6 gear) The 7AT (including my FX) has a 3 bolt flange connceting driveshaft to diff, while the 6MT has the round 4 bolt flange. Otherwise, the axle flanges are same 6bolt and should work just fine.
 
illestFX35 said:
Most likely I will use a G37s 6mt driveshaft to a G37s 6MT VLSD (3.6 gear) The 7AT (including my FX) has a 3 bolt flange connceting driveshaft to diff, while the 6MT has the round 4 bolt flange. Otherwise, the axle flanges are same 6bolt and should work just fine.
Click to expand...
When I went to put one from a g37 into my 2013; the flanges were different sized, and non-lsd flange inputs are different lengths than LSD. You can get the same ratio from a awd QX’s differential, but not limited slip..Infiniti has supreme confidence in their anti slip technology.

I’ll keep an eye on this post, I was trying to get limited slip, but the different sized axle half shaft size was where I got stumped. Or dollar$, any way my posts are mostly down below in “Similar Threads.”:cool:
 
Old Blue said:
When I went to put one from a g37 into my 2013; the flanges were different sized, and non-lsd flange inputs are different lengths than LSD. You can get the same ratio from a awd QX’s differential, but not limited slip..Infiniti has supreme confidence in their anti slip technology.

I’ll keep an eye on this post, I was trying to get limited slip, but the different sized axle half shaft size was where I got stumped. Or dollar$, any way my posts are mostly down below in “Similar Threads.”:cool:
Click to expand...

If I can get a 6MT to work, I would need a different driveshaft anyways so that shouldnt be a problem...
 
So...just "because" then. Alright. Thought you might have a more specific reason.
 
illestFX35 said:
Most likely I will use a G37s 6mt driveshaft to a G37s 6MT VLSD (3.6 gear) The 7AT (including my FX) has a 3 bolt flange connceting driveshaft to diff, while the 6MT has the round 4 bolt flange. Otherwise, the axle flanges are same 6bolt and should work just fine.
Click to expand...

I found the axle stub flanges to be different size 6bolt patterns. How’d that work out for you?:confused:
 
onthemove said:
Na. Unless he plans on pushing power up beyond what the auto or a built auto will handle, he'd be faster with the auto.
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10% steeper axle ratio should translate into a little quicker starts from dead stop, and maybe I’ll feel it across the whole driving spectrum

I’m just talking about a simple pumpkin swap. All AWD FX/QX’s have steeper differentials than RWD.

I’d love a manual,but too much warranty left to do it today.
 
I'm referring to the transmission, not the rear differential's ring & pinion. The auto transmission in the 2nd generation is the one thing I'd like to swap into my 1st generation except for the fact that the trans in the 1st generation is stronger and will take more power, per Import Perf. Transmissions. You'll loose acceleration with a manual vs the auto therefore the only reason to go to such an expense would be because you seek to exceed it's torque holding capacity.
 
I thought you said you were going to connect your MT to VLSD from a G-37, earlier...It’s not just a drive shaft issue, the axle stub flanges are bigger on FX/QX than the g37. Can you use G37 axles reliably?

I’ll keep an eye out for when you, or anyone else gets to the posit traction axle stub solution.

I don’t really need a different trans, I’m not going to get into that much HP.

I have a 5 speed Jeep Wrangler to scratch that itch when I need to. :cool:

I’ll bet you can build a real beast, if you put your mind and checkbook to it.
 
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Old Blue said:
I thought you said you were going to connect your MT to VLSD from a G-37, earlier...It’s not just a drive shaft issue, the axle stub flanges are bigger on FX/QX than the g37. Can you use G37 axles reliably?

I’ll keep an eye out for when you, or anyone else gets to the posit traction axle stub solution.

I don’t really need a different trans, I’m not going to get into that much HP.

I have a 5 speed Jeep Wrangler to scratch that itch when I need to. :cool:

I’ll bet you can build a real beast, if you put your mind and checkbook to it.
Click to expand...

I got G37 axles sitting in my house they look very similar to the FX ones but I’ve been too busy with my other cars and work. I haven’t prioritized this job... Hopefully by the end of the year I can work on the diff.
 
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