VHR + FD Gear Ratio upgrades - 3.9 and 4.08

209Z · 11-29-2010, 08:15 PM

now im really curious in getting this setup lol

L33T Z34 · 02-01-2011, 06:13 AM

I forgot to mention this in my last post. When I upgraded my final drive I had
to buy another left side flange for the OS Giken (D-NB102061405-S) super lock LSD. The Nissan OEM part is 38220-1NC1B. This flange is longer and has a C-clip on it.

L33T Z34 · 02-01-2011, 11:46 PM

The whole rear differential part numbers:
370Z, auto trans, 2 pin rear final drive: 38301-EG33D (OCT 08 - AUG 14?)
" Viscous LSD: 38301-EH33D (OCT 08 - AUG 14?)

370Z, auto trans, w/2 pin internal rear differential part numbers:
------------------------------------------------------------------
38220-1NC0A x2 flange assy, right & left side
38342-P9010 x2 seal-oil, diff side
38440-0C000 x2 bearing, diff side
38453-N31__ x2 shim-adjust, side bearing (variable part number, won't know until builder inspects)
38421-0C00A case-differential (this is the open diff, replaces the Viscous LSD or will be replaced w/an aftermarket clutch locker)
38427-0C000 shaft-pinion mate
38425-21W0A pinion-mate
38423-0C00A gear-side
38426-21W00 washer-thrust, pinion mate
38424-0C000 washer-thrust, side gear
38428-U1500 pin-lock, pinion shaft
38225-40P71 circlip-side gear
38102-7S000 bolt, drive gear
38100-0F36A gear set-final drive (3.357; straight cut gears, stronger but whine more; see Frontier gear sets to upgrade to)
38154-0C0__ washer-adjust, drive pinion (variable part number, won't know until builder inspects)
38120-EC000 bearing-drive pinion, rear
38165-0C020 spacer-housing
38140-0C000 bearing-drive pinion, front
38189-P0117 seal-oil, drive pinion
38210-EC020 flange assy, companion
43262-01P1A nut-drive pinion
38351-0C000 cover rear, final dr (upgrade to Nismo finned LSD rear cover for $50 more; 38351-350DK)

370Z, auto trans, w/LSD internal rear differential part numbers:
----------------------------------------------------------------
38220-JK01A flange assy, right side
38220-JK01B flange assy, left side
38342-P9010 x2 seal-oil, diff side
38440-0C000 x2 bearing, diff side
38453-N31__ x2 shim-adjust, side bearing (variable part number, won't know until builder inspects)
38420-2C000 case-differential entire viscous assy (crap, this part is unique to the auto trans LSD and the reason why final drive gears can't just be bolted in; replace this w/an aftermarket clutch locker)
38100-0F36A gear set-final drive (3.357; straight cut gears, stronger but whine more; see Frontier gear sets to upgrade to)
38154-0C0__ washer-adjust, drive pinion (variable part number, won't know until builder inspects)
38120-EC000 bearing-drive pinion, rear
38165-0C020 spacer-housing
38140-0C000 bearing-drive pinion, front
38189-P0117 seal-oil, drive pinion
38210-EC020 flange assy, companion
43262-01P1A nut-drive pinion
38351-0C000 cover rear, final dr (upgrade to Nismo finned LSD rear cover for $50 more; 38351-350DK)

chuckd05 · 02-04-2011, 07:08 AM

I had the shop replace every bearing and bushing during the install , the shop re opened it and adjusted the backlash. The whine is now very very vague. Almost non existent, I should of posted that earlier.

On occasion you can here a very minute whine. They said the Case and available shims just couldn't be perfect but that all measurements are well within spec. I trust them. Its about 5 percent of what it was originally, so far no problems.

Never experienced axle hop. The car spins fine, no wheel hop either.

Zat_Zuma · 02-04-2011, 07:44 AM

No matter what they say about gear whine being within specs, its bogus.
The backlash (pinion gear) is out and needs to be redone. The amount of different shims available for the diff makes the excuse given; bogus. The adjustments are time consuming and require very meticulous measurements. My diff had zero issues and no whine at all until I broke it.
The clearances were done to my specifications and the backlash was perfect. It took the master technician a full day to rebuild it and to get it right.

With the 4.083 gears the clearances and backlash must be better than factory specs or you will get a small amount of gear whine. Compare the factory specs on a frontier with 4.083 gears, 350Z with 3.5 gears and our 370Z's with 3.7 gears and look at the differences.

But since you trust your shop and seem to be happy with their work, I really don't see why you are complaining if your leaving out imortant info and are satisfied with what you have.

andre12031948 · 10-31-2013, 04:26 PM

Quote:

Originally Posted by Zat_Zuma

No matter what they say about gear whine being within specs, its bogus.
The backlash (pinion gear) is out and needs to be redone. The amount of different shims available for the diff makes the excuse given; bogus. The adjustments are time consuming and require very meticulous measurements. My diff had zero issues and no whine at all until I broke it.
The clearances were done to my specifications and the backlash was perfect. It took the master technician a full day to rebuild it and to get it right.

With the 4.083 gears the clearances and backlash must be better than factory specs or you will get a small amount of gear whine. Compare the factory specs on a frontier with 4.083 gears, 350Z with 3.5 gears and our 370Z's with 3.7 gears and look at the differences.

But since you trust your shop and seem to be happy with their work, I really don't see why you are complaining if your leaving out imortant info and are satisfied with what you have.

"until I broke it" You need 600h.p + wide low air pressure slicks & come out of a standing start at over 6,000 rpm to maybe break a well installed ring & pinion set. What I'm saying is obvious, so I'll leave it there.

chuckd05 · 02-05-2011, 01:50 AM

Well it was bad at first. Than they opened it and it improved to a large degree. I am not a genius on rear ends or proper backlash specs. I am always learning and will run it by the shop again.

L33T Z34 · 02-15-2012, 10:49 AM

For future reference...
What to look for in JDM salvage importer stock if buying used.

JDM whole rear differential, R200(V), with lower final drive gears!

2005-2006 Skyline sedan w/VQ35DE and CVT
JDM part number: 38301-2C807 (4.363 final drive; has the 350Z/G35 axle flanges)

2007-2012 Skyline sedan w/VQ25HR
JDM part number: 38301-EH64A (3.916 final drive)

L33T Z34 · 10-09-2012, 11:35 AM

I got a chance to take pictures of my 3.90 and 4.36 ring and pinions.

3.916 FD = part number 381000B66A
4.363 FD = part number 381000C860

G37Sam · 04-08-2013, 06:53 AM

Hey Leet,

Where'd you buy the 4.363 ring and pinion from?

Wonka2581 · 04-09-2013, 03:54 PM

Sub'd for future reference.

L33T Z34 · 08-26-2013, 09:34 PM

Quote:

Originally Posted by G37Sam

Hey Leet,

Where'd you buy the 4.363 ring and pinion from?

A nissan dealer! It's that EASY! Don't let these "perfomance shops" fool u!

G37Sam · 08-27-2013, 03:19 PM

Better late than never I guess haha

Zat_Zuma · 10-31-2013, 05:17 PM

What is this?

Better late than never at all

Sorry, but I've been trapped in a time warp

That was written in 2011, Feb

Where the frick have you been???

andre12031948 · 10-31-2013, 05:23 PM

Quote:

Originally Posted by Zat_Zuma

What is this?

Better late than never at all

Sorry, but I've been trapped in a time warp

That was written in 2011, Feb

Where the frick have you been???

I went from last back

11-29-2010, 08:15 PM	#1 (permalink)
209Z A True Z Fanatic Join Date: Mar 2009 Location: Stockton, Cali (209) Posts: 1,058 Drives: 09 370z Rep Power: 279	now im really curious in getting this setup lol __________________ Team Blur My Build Thread Fast Intentions\|KWS\|BERK\|Carbon Fiber Element\| SEIBON\|Memphis Car Audio\| Status Autoworks\|Lusso Forged\|Autohaus\|PWJDM\|SPC

02-01-2011, 11:46 PM	#3 (permalink)
L33T Z34 Banned Join Date: Jun 2010 Location: Ahnald, MO Age: 47 Posts: 387 Drives: 09 K51 G C Bw/S 6MT Rep Power: 0	For the AUTO trans guys The whole rear differential part numbers: 370Z, auto trans, 2 pin rear final drive: 38301-EG33D (OCT 08 - AUG 14?) " Viscous LSD: 38301-EH33D (OCT 08 - AUG 14?) 370Z, auto trans, w/2 pin internal rear differential part numbers: ------------------------------------------------------------------ 38220-1NC0A x2 flange assy, right & left side 38342-P9010 x2 seal-oil, diff side 38440-0C000 x2 bearing, diff side 38453-N31__ x2 shim-adjust, side bearing (variable part number, won't know until builder inspects) 38421-0C00A case-differential (this is the open diff, replaces the Viscous LSD or will be replaced w/an aftermarket clutch locker) 38427-0C000 shaft-pinion mate 38425-21W0A pinion-mate 38423-0C00A gear-side 38426-21W00 washer-thrust, pinion mate 38424-0C000 washer-thrust, side gear 38428-U1500 pin-lock, pinion shaft 38225-40P71 circlip-side gear 38102-7S000 bolt, drive gear 38100-0F36A gear set-final drive (3.357; straight cut gears, stronger but whine more; see Frontier gear sets to upgrade to) 38154-0C0__ washer-adjust, drive pinion (variable part number, won't know until builder inspects) 38120-EC000 bearing-drive pinion, rear 38165-0C020 spacer-housing 38140-0C000 bearing-drive pinion, front 38189-P0117 seal-oil, drive pinion 38210-EC020 flange assy, companion 43262-01P1A nut-drive pinion 38351-0C000 cover rear, final dr (upgrade to Nismo finned LSD rear cover for $50 more; 38351-350DK) 370Z, auto trans, w/LSD internal rear differential part numbers: ---------------------------------------------------------------- 38220-JK01A flange assy, right side 38220-JK01B flange assy, left side 38342-P9010 x2 seal-oil, diff side 38440-0C000 x2 bearing, diff side 38453-N31__ x2 shim-adjust, side bearing (variable part number, won't know until builder inspects) 38420-2C000 case-differential entire viscous assy (crap, this part is unique to the auto trans LSD and the reason why final drive gears can't just be bolted in; replace this w/an aftermarket clutch locker) 38100-0F36A gear set-final drive (3.357; straight cut gears, stronger but whine more; see Frontier gear sets to upgrade to) 38154-0C0__ washer-adjust, drive pinion (variable part number, won't know until builder inspects) 38120-EC000 bearing-drive pinion, rear 38165-0C020 spacer-housing 38140-0C000 bearing-drive pinion, front 38189-P0117 seal-oil, drive pinion 38210-EC020 flange assy, companion 43262-01P1A nut-drive pinion 38351-0C000 cover rear, final dr (upgrade to Nismo finned LSD rear cover for $50 more; 38351-350DK) Last edited by L33T Z34; 02-02-2011 at 04:48 AM.

02-04-2011, 07:08 AM	#4 (permalink)
chuckd05 A True Z Fanatic Join Date: Oct 2009 Location: NY Posts: 2,391 Drives: No longer a Z Rep Power: 20	I had the shop replace every bearing and bushing during the install , the shop re opened it and adjusted the backlash. The whine is now very very vague. Almost non existent, I should of posted that earlier. On occasion you can here a very minute whine. They said the Case and available shims just couldn't be perfect but that all measurements are well within spec. I trust them. Its about 5 percent of what it was originally, so far no problems. Never experienced axle hop. The car spins fine, no wheel hop either. __________________ 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 :-) Last edited by chuckd05; 02-04-2011 at 07:12 AM.

02-04-2011, 07:44 AM	#5 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 19	No matter what they say about gear whine being within specs, its bogus. The backlash (pinion gear) is out and needs to be redone. The amount of different shims available for the diff makes the excuse given; bogus. The adjustments are time consuming and require very meticulous measurements. My diff had zero issues and no whine at all until I broke it. The clearances were done to my specifications and the backlash was perfect. It took the master technician a full day to rebuild it and to get it right. With the 4.083 gears the clearances and backlash must be better than factory specs or you will get a small amount of gear whine. Compare the factory specs on a frontier with 4.083 gears, 350Z with 3.5 gears and our 370Z's with 3.7 gears and look at the differences. But since you trust your shop and seem to be happy with their work, I really don't see why you are complaining if your leaving out imortant info and are satisfied with what you have. __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD Last edited by Zat_Zuma; 02-04-2011 at 02:54 PM.

02-05-2011, 01:50 AM	#7 (permalink)
chuckd05 A True Z Fanatic Join Date: Oct 2009 Location: NY Posts: 2,391 Drives: No longer a Z Rep Power: 20	Well it was bad at first. Than they opened it and it improved to a large degree. I am not a genius on rear ends or proper backlash specs. I am always learning and will run it by the shop again. __________________ 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 :-)

02-01-2011, 06:13 AM	#2 (permalink)
L33T Z34 Banned Join Date: Jun 2010 Location: Ahnald, MO Age: 47 Posts: 387 Drives: 09 K51 G C Bw/S 6MT Rep Power: 0	I forgot to mention this in my last post. When I upgraded my final drive I had to buy another left side flange for the OS Giken (D-NB102061405-S) super lock LSD. The Nissan OEM part is 38220-1NC1B. This flange is longer and has a C-clip on it.

02-15-2012, 10:49 AM	#8 (permalink)
L33T Z34 Banned Join Date: Jun 2010 Location: Ahnald, MO Age: 47 Posts: 387 Drives: 09 K51 G C Bw/S 6MT Rep Power: 0	JDM R200(V) part numbers For future reference... What to look for in JDM salvage importer stock if buying used. JDM whole rear differential, R200(V), with lower final drive gears! 2005-2006 Skyline sedan w/VQ35DE and CVT JDM part number: 38301-2C807 (4.363 final drive; has the 350Z/G35 axle flanges) 2007-2012 Skyline sedan w/VQ25HR JDM part number: 38301-EH64A (3.916 final drive) fuct likes this.

04-08-2013, 06:53 AM	#10 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 21	Hey Leet, Where'd you buy the 4.363 ring and pinion from? __________________ '14 Viper GTS '08 RB'd G37S - Sold

04-09-2013, 03:54 PM	#11 (permalink)
Wonka2581 A True Z Fanatic Join Date: Nov 2012 Location: Chattanooga, TN Posts: 3,083 Drives: MY WIFE CRAZY.... Rep Power: 2612	Sub'd for future reference. __________________ "I have nothing to offer but blood, toil, tears and sweat""Winston Churchill"

08-27-2013, 03:19 PM	#13 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 21	Better late than never I guess haha __________________ '14 Viper GTS '08 RB'd G37S - Sold

10-31-2013, 05:17 PM	#14 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 19	What is this? Better late than never at all Sorry, but I've been trapped in a time warp That was written in 2011, Feb Where the frick have you been??? __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD Last edited by Zat_Zuma; 10-31-2013 at 05:19 PM.

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