Thats w/ 4.08? I dont think so... should be close to 4k no?

I think he meant stock rear end on 6MT (3.692)

correct. i went driving today. i was around 3200 at 85 in my 6MT. so i guess with a 4.08 it would be like 3700-3800?

what's the average price of a rear diff swap out??

I think this would be a great mod, the 370z is a little sluggish exiting a sharp turn in second gear, this would help put it more into the powerband. :tup: My only concern would be drivetrain wine/noise. I've done this swap before on my last few mustangs 4:10's and the drivetrain noise went up considerably. Maybe the gears weren't set right.

Has it been confirmed that the final drive gears for the 350Z will fit the 370Z? If so, how difficult is it to install them?

I can probably answer this question for you. Were they Motive gears (or other), or Ford Racing Performance Parts gears?

Price depends.

4.08's are a nissan part ( ring gear from a nissan frontier ) +/- $400
3.9's are aftermarket ( Central 20 ) +/- $600

Install requires a few OEM parts (Pinion bolt, crush sleeve, some seals,etc)

All in, installed probably about a grand. Considering it's less then some exhausts, it's a no brainer to me.

And yes, this is the same R200 diff in the 350z, G35, G37 ( and about a dozen other Nissan cars/Trucks)

Pete

sweeeeet. this will be an awesome mod for us

I'd definately consider this mod for people who aren't commuting in their Zs to work/school/wherever 5 days a week. Good for the weekend warrior type where gas mileage isn't so important. I'll consider this mod after I find a suitable daily driver!

had a chance to ride in my buddies 350 with the 4.08 swap from Z1. all i can say is wow!! what a diffference. its like u shift down a gear...2nd pulls like first, as does 4th pulls like 3rd. it makes the car soooooo rev happy. it's a lot of fun. the only downside was that it made some noise. this seemed to be a problem with a couple other ppl. maybe becuase it had not been broken in, but i will ask him to update after 1k miles. he bought the stage 2 (or whatever) which came with all new bushings, etc. so it was basically a brandddd new rear end. cool mod. some1 should do it to the 370

You? :) I'm starting to really think about just moving mine up to the 6MT's rear end (3.692 instead of 3.357 that came with my 7AT). I need to go run the numbers again and think about high-speed RPMs more though (that, and wait for a programmer like UpRev that can tell the ECU about it too).

Edit:

7th gear on a stock 7AT setup with stock Sport wheels/tires is approximately 32.78 revs/mph. Swapping in the 6MT's rear end would put it at about 36.04 revs/mph. This is what the revs would look like with the two options, cruising in 7th on a very long track:

mph | rpm | rpm
100 | 3278 | 3604
110 | 3606 | 3964
120 | 3934 | 4325
130 | 4261 | 4685
140 | 4589 | 5046
150 | 4917 | 5406

In the lower 100's it's not too bad a difference. Even at 150mph it's only 500rpm. Hmmmm....

me. nah. i drive wayyyyyyyyyy too much on highways. im not really racing anyway. but u should look into it. that would be a nice swap (the AT to MT).

Pete, I got a 350Z with 4.08s on it... so if I had a 370Z, I could take it to a shop and swap pumpkins?

This sounds like good news to me. My next question like the OP has asked...

How does changing to a lighter flywheel (like JWT) affect Synchro Rev Match shifting? Will it over compensate the rev? Or will it rev match instantly?

Why do you have to "wait for a programmer like UpRev that can tell the ECU about it too?"

Maybe i'm wrong but...

I do not see the reason to advise the ECU.

If you call a gear downshifting, ECU-tranny will give you it anyway, just checking the RPM, not speed...

Or I'm wrong?

Anyone has experience with changing ratio in AT (infiniti, 350Z etc)?

Bye!

I meant so the speedo will be correct.