VHR + FD Gear Ratio upgrades - 3.9 and 4.08

shabarivas · 04-20-2009, 03:44 PM

Do post his speeds and rpms ... very interested in details

RCZ · 04-20-2009, 04:28 PM

Roughly 80mph=3100rpm in 6th.

shabarivas · 04-20-2009, 04:56 PM

Quote:

Originally Posted by RCZ

Roughly 80mph=3100rpm in 6th.

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

wstar · 04-20-2009, 05:37 PM

Quote:

Originally Posted by shabarivas

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)

SOLISIMO · 04-20-2009, 04:31 PM

WHat should I get on my 5AT G37?

ssqpolo · 04-20-2009, 10:09 PM

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?

Minicobra1 · 04-20-2009, 11:45 PM

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.

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.

LiquidZ · 04-21-2009, 12:35 PM

Quote:

Originally Posted by Minicobra1

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.

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.

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

Skorch · 04-21-2009, 12:04 PM

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?

KLRCADI · 04-21-2009, 10:48 PM

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

Unicorn_blood · 05-15-2009, 12:27 PM

Quote:

Originally Posted by KLRCADI

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

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?

javol · 08-15-2009, 09:55 AM

Quote:

Originally Posted by KLRCADI

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

At mynismo.com i found this item:

4.083 Ring And Pinion - Z33 (part nº 38100-0C760)

Asking them if it fits 370Z the answer that it's NOT.

According to them 350Z use a R205 DIFF...

Heeeelpppp!!!!!

javol · 09-07-2009, 09:29 PM

Quote:

Originally Posted by KLRCADI

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

Pete

Exactly the same R200 diff?

Here we go with the two OEM Nissan figure:

350Z

370Z

From the images and parts numbers, we can see that 370Z diff comes with 4 satellites..... 350Z with only 2 satellites...

The other components seem to be "more or less" the same...

Any of you can give a reliable tech opinion?

Bye,

ssqpolo · 04-21-2009, 11:37 PM

sweeeeet. this will be an awesome mod for us

Diversion · 04-28-2009, 06:02 PM

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!

04-20-2009, 11:45 PM	#7 (permalink)
Minicobra1 A True Z Fanatic Join Date: Nov 2008 Location: Orange County, CA. Posts: 1,205 Drives: 370Z Tour, Spt, 6mt Rep Power: 646	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. 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. __________________ 370z Tour\| Spt Pack\|Navi\|BERK CBE\|Berk HFC's\| Eibach Springs\| Hotchkis Sway Bars\|SPC Camber Arms\|15mm Ichiba Wheel Spacers\| 19"Factory Nismo Wheels-Matt Black\|Stop Tech Rotors\|TWM Shifter\|3M Tint\|Black Fangs\|Black Rear Valance\|JDM Fog Light\| MY BAND-www.myspace.com/petroleum

04-21-2009, 12:04 PM	#9 (permalink)
Skorch Enthusiast Member Join Date: Feb 2009 Location: Phoenix, AZ Posts: 469 Drives: 2012 370Z Rep Power: 542	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? __________________ '12 370Z + Sport \| Stillen Gen3 Intakes \| Stillen UD Pulley \| Motordyne M370 \| FI Exhaust \| FI HFCs \| 4.08 Gears \| Uprev tuned

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Problem after some Audio Upgrades	209Z	Audio & Video	1	06-13-2009 01:16 PM
6th Gear Syncros going after 5K.	Scribe	Engine & Drivetrain	50	05-22-2009 02:54 PM
first to second gear..	DJcuetip	Nissan 370Z General Discussions	3	02-06-2009 10:42 PM
Top Gear?	370z2	Nissan 370Z General Discussions	1	02-03-2009 11:43 PM
Close ratio gears?	tvfreakazoid	Engine & Drivetrain	24	01-30-2009 03:44 PM

04-20-2009, 03:44 PM	#1 (permalink)
shabarivas A True Z Fanatic Join Date: Apr 2009 Location: Sacramento, CA Posts: 2,188 Drives: 370z MB 6mt Rep Power: 916	Do post his speeds and rpms ... very interested in details

04-20-2009, 04:28 PM	#2 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1120	Roughly 80mph=3100rpm in 6th.

04-20-2009, 04:31 PM	#5 (permalink)
SOLISIMO Track Member Join Date: Apr 2009 Location: Florida Posts: 510 Drives: TOP SECRET G37S Rep Power: 19	WHat should I get on my 5AT G37?

04-20-2009, 10:09 PM	#6 (permalink)
ssqpolo Track Member Join Date: Jan 2009 Location: Florida Posts: 882 Drives: '12 Black Nismo Rep Power: 269	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?

04-21-2009, 10:48 PM	#10 (permalink)
KLRCADI Base Member Join Date: Apr 2009 Location: Toronto Posts: 11 Drives: 2005 CTS-V Rep Power: 18	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

04-21-2009, 11:37 PM	#14 (permalink)
ssqpolo Track Member Join Date: Jan 2009 Location: Florida Posts: 882 Drives: '12 Black Nismo Rep Power: 269	sweeeeet. this will be an awesome mod for us

04-28-2009, 06:02 PM	#15 (permalink)
Diversion Enthusiast Member Join Date: Apr 2009 Location: Jacksonville, Florida Posts: 393 Drives: 09 370Z Silver/Persi Rep Power: 286	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!