VHR + FD Gear Ratio upgrades - 3.9 and 4.08

Z1Performance · 02-06-2010, 02:07 PM

I don't know the why's, all I know is that it will not work

magisky · 02-07-2010, 01:57 AM

but we did verify it does not kill cruise on manuals?

DanMardik · 03-23-2010, 06:52 PM

So did anyone get this done? I'm anxiously waiting for a review on this so that I can proceed with my Final gear project!!

Dan

DannyGT · 03-23-2010, 07:12 PM

I have another question, is this something that benefits all applications or just more so NA? When I get the GTM SC in the mail, should I want to do this upgrade? Will it compliment the SC? This sounds great!

jnaut · 04-14-2010, 11:29 AM

what is the exact year/make/model/trans gear sets fits into 370 manual axle? whats geas ratior are avaible..confimed! only nissan parts.

StealthZ · 04-14-2010, 04:51 PM

gears are available in stock configuration, 3.9, and 4.08. Nissan makes them, some JDM companies sell them too but more pricey. Z1auto sells all the combos out there and they know them very well(not saying any other of our companies here don't). Just that I worked with them when I had my vq35HR 350z and the FD gearing changes things up a lot.

jnaut · 04-14-2010, 05:24 PM

i am just curious exactly which one from nissan fits my car as i can get nissan gear set for about 200$ less then z1 sells them for. i hear that an 06 frontier se with 2.5l manual is 4.08 ratio, but i dont know if it fits the 370...can anyone confirm this?

chuckd05 · 04-15-2010, 01:15 PM

Is it a known fact that the diffs are the same from the HR Z's ? Same Pumpkin as well ?

so if I got a VLSD out of a 07-08 HR I could swap that pumpkin into mine with no additional parts needed ?

StealthZ · 04-15-2010, 04:22 PM

don't you already have a VLSD? To my knowledge it is possible, may need some small parts, but I believe pumpkins are the same

jnaut · 04-16-2010, 07:16 AM

i already have vsld.just want to do a gear swap.

cullmann · 04-18-2010, 06:27 AM

I had the 370Z 7A/T with VLSD.
Let me know the way to get the mechanical LSD with 4.08 F/D for my 370Z auto.

Z1Performance · 04-19-2010, 02:29 PM

Quote:

Originally Posted by cullmann

I had the 370Z 7A/T with VLSD.
Let me know the way to get the mechanical LSD with 4.08 F/D for my 370Z auto.

you would need to change your differential as well as the ring and pinion - there are also some installation parts that will be needed as well

Ivoidwarranty · 04-26-2010, 11:25 PM

Not looking good for the the Autos if you want to keep cruise control. This is a blurb from the cruise control section dealing with the ICC, I'm still looking for a section seperate from the ICC but I'm willing to bet it uses the same logic. It's from a section talking about trouble shooting and what might cause the cruise control not to work.

If the vehicle speed signal (wheel speed) from the
ABS actuator and electric unit (control unit) and
the A/T vehicle speed sensor signal (output shaft
revolution signal) from TCM, received by the ICC
sensor integrated unit with CAN communication,
are inconsistent.

I'm pretty sure it's saying that the computer takes three different inputs from the CAN bus and reads them. The computer tables are set up for the stock rear gear and after you change the gears the driveshaft speed and the rear wheel speed do not match in the tables anymore and cause it to fail safe (OFF).

CBRich · 05-10-2010, 12:12 PM

So Z1 I have a question for you. For me to swap my M6 with no LSD to the 4.08 I would need . . .

And to add an OS Giken LSD I would need . . .

Z1Performance · 05-11-2010, 07:04 AM

Quote:

Originally Posted by CBRich

So Z1 I have a question for you. For me to swap my M6 with no LSD to the 4.08 I would need . . . .

the final drive, and installation parts

And to add an OS Giken LSD I would need . . .[/QUOTE]

nothing assuming you have the install parts mentioned above

02-07-2010, 01:57 AM	#122 (permalink)
magisky Base Member Join Date: Jan 2010 Location: Houston Tx Posts: 18 Drives: 09 370z touring 6sp Rep Power: 15	but we did verify it does not kill cruise on manuals? __________________ http://www.the370z.com/images/smilies/iagree.gif

03-23-2010, 07:12 PM	#124 (permalink)
DannyGT Track Member Join Date: Jan 2009 Location: Jersey Posts: 919 Drives: 370Z (SOLD) Rep Power: 279	I have another question, is this something that benefits all applications or just more so NA? When I get the GTM SC in the mail, should I want to do this upgrade? Will it compliment the SC? This sounds great! __________________ Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)

04-15-2010, 01:15 PM	#128 (permalink)
chuckd05 A True Z Fanatic Join Date: Oct 2009 Location: NY Posts: 2,391 Drives: No longer a Z Rep Power: 19	Is it a known fact that the diffs are the same from the HR Z's ? Same Pumpkin as well ? so if I got a VLSD out of a 07-08 HR I could swap that pumpkin into mine with no additional parts needed ? __________________ 09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)

04-18-2010, 06:27 AM	#131 (permalink)
cullmann Base Member Join Date: Dec 2008 Location: seoul Posts: 24 Drives: 09 370Z MB 7A/T Rep Power: 16	I had the 370Z 7A/T with VLSD. Let me know the way to get the mechanical LSD with 4.08 F/D for my 370Z auto. Last edited by cullmann; 04-18-2010 at 06:30 AM.

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02-06-2010, 02:07 PM	#121 (permalink)
Z1Performance Base Member Join Date: Aug 2009 Location: St. James, NY Posts: 237 Drives: 350Z Rep Power: 15	I don't know the why's, all I know is that it will not work

03-23-2010, 06:52 PM	#123 (permalink)
DanMardik Base Member Join Date: Mar 2010 Location: Irvine, CA Posts: 2 Drives: 2008 Infiniti G37S Rep Power: 15	So did anyone get this done? I'm anxiously waiting for a review on this so that I can proceed with my Final gear project!! Dan

04-14-2010, 11:29 AM	#125 (permalink)
jnaut A True Z Fanatic Join Date: Dec 2009 Location: wpb, fl Posts: 1,146 Drives: 09 370z Rep Power: 17	what is the exact year/make/model/trans gear sets fits into 370 manual axle? whats geas ratior are avaible..confimed! only nissan parts.

04-14-2010, 04:51 PM	#126 (permalink)
StealthZ Enthusiast Member Join Date: Jun 2009 Location: Virginia Posts: 356 Drives: '14 GTR Premium Rep Power: 16	gears are available in stock configuration, 3.9, and 4.08. Nissan makes them, some JDM companies sell them too but more pricey. Z1auto sells all the combos out there and they know them very well(not saying any other of our companies here don't). Just that I worked with them when I had my vq35HR 350z and the FD gearing changes things up a lot.

04-14-2010, 05:24 PM	#127 (permalink)
jnaut A True Z Fanatic Join Date: Dec 2009 Location: wpb, fl Posts: 1,146 Drives: 09 370z Rep Power: 17	i am just curious exactly which one from nissan fits my car as i can get nissan gear set for about 200$ less then z1 sells them for. i hear that an 06 frontier se with 2.5l manual is 4.08 ratio, but i dont know if it fits the 370...can anyone confirm this?

04-15-2010, 04:22 PM	#129 (permalink)
StealthZ Enthusiast Member Join Date: Jun 2009 Location: Virginia Posts: 356 Drives: '14 GTR Premium Rep Power: 16	don't you already have a VLSD? To my knowledge it is possible, may need some small parts, but I believe pumpkins are the same

04-16-2010, 07:16 AM	#130 (permalink)
jnaut A True Z Fanatic Join Date: Dec 2009 Location: wpb, fl Posts: 1,146 Drives: 09 370z Rep Power: 17	i already have vsld.just want to do a gear swap.

04-26-2010, 11:25 PM	#133 (permalink)
Ivoidwarranty Base Member Join Date: Nov 2009 Location: Nebraska Posts: 59 Drives: 08 G37S Rep Power: 15	Not looking good for the the Autos if you want to keep cruise control. This is a blurb from the cruise control section dealing with the ICC, I'm still looking for a section seperate from the ICC but I'm willing to bet it uses the same logic. It's from a section talking about trouble shooting and what might cause the cruise control not to work. If the vehicle speed signal (wheel speed) from the ABS actuator and electric unit (control unit) and the A/T vehicle speed sensor signal (output shaft revolution signal) from TCM, received by the ICC sensor integrated unit with CAN communication, are inconsistent. I'm pretty sure it's saying that the computer takes three different inputs from the CAN bus and reads them. The computer tables are set up for the stock rear gear and after you change the gears the driveshaft speed and the rear wheel speed do not match in the tables anymore and cause it to fail safe (OFF).

05-10-2010, 12:12 PM	#134 (permalink)
CBRich A True Z Fanatic Join Date: Apr 2009 Location: SC Posts: 2,464 Drives: 370Z Rep Power: 544	So Z1 I have a question for you. For me to swap my M6 with no LSD to the 4.08 I would need . . . And to add an OS Giken LSD I would need . . .