3.90 Gearset

roger22 · 08-27-2008, 06:03 AM

Anybody know where to get a 3.90 gearset new these days, seems they are hard to locate???

SMB350Z · 08-27-2008, 06:06 AM

3.9 and 4.08 Final Drive Kits in Stock!

just bought a 4.08 a few minutes ago.... great seller, they also have the 3.9

roger22 · 08-27-2008, 06:08 AM

Thanks, that was fast!!!

SMB350Z · 08-27-2008, 06:21 AM

no problem!!

Fletch69z · 08-27-2008, 02:35 PM

I've heard good things about Z1 also. I bought mine for $500 shipped (central 20 3.9) from another vender on here but now I can't remember who it was. That was almost a year ago now, hmmm...

GWord256 · 08-28-2008, 12:12 PM

How difficult is it to get these installed? I've been considering a new final gear for a while and now that I have a 2nd vehicle this mod has moved up significantly on my list.

Where do you get them installed? A good transmission shop, dealer, just any mechanic?

Axelerate · 08-28-2008, 01:40 PM

I had a dealer do mine. Just find someone that is comfortable working with rear ends.

There's a lot that goes into making sure everything is to spec.

Fletch69z · 08-29-2008, 02:55 PM

I was lucky that I had a friend who works as a tech for Subaru and has had a lot of experience swapping gears in rear ends who did it for $100,

. I know, it was a hell of a deal. It took him one night and they have run like a dream ever since they were installed last December. It's completely worth $600 (even more if you have to pay more) because the difference is immediately evident.

Triple8Sol · 08-29-2008, 08:12 PM

I didn't even know there was a 4.08 available. Sounds like a good idea for NA cars.

Running the 350 Evo 3.9FD with my Vortech, and love the combo.

n1cK! · 08-29-2008, 10:13 PM

Quote:

Originally Posted by Fletch69z

I've heard good things about Z1 also. I bought mine for $500 shipped (central 20 3.9) from another vender on here but now I can't remember who it was. That was almost a year ago now, hmmm...

+1 for adam and the guys over at z1auto. you can't go wrong with them roger..top notch customer service and they really go out of their way to help you out and give you sound advice.

n1cK! · 08-29-2008, 10:16 PM

Quote:

Originally Posted by GWord256

How difficult is it to get these installed? I've been considering a new final gear for a while and now that I have a 2nd vehicle this mod has moved up significantly on my list.

Where do you get them installed? A good transmission shop, dealer, just any mechanic?

definitely take it to a very reputable rear end mechanic. these things are pretty tricky to shim right (sometimes you get lucky), and if you're off even a couple of thousandths, you risk the life of the ring gear and pinion.

there's a couple of DIY's here on the forums, but if you don't know what you're doin' or don't have the proper tools, i would definitely take it somewhere.

skk72 · 09-02-2008, 04:39 PM

are you guys familiar with tomei 3.9 final gear?

Fletch69z · 09-04-2008, 11:59 AM

Quote:

Originally Posted by Triple8Sol

I didn't even know there was a 4.08 available. Sounds like a good idea for NA cars.

Running the 350 Evo 3.9FD with my Vortech, and love the combo.

I'm glad to hear that you like the 3.9 gears with the Vortech. I have a buddy that has a G35 coupe and had a Vortech on it but said tha tif he had dones gears it would have been way to short to be a good thing. I had already done my gears at that point and I was thinking "Crap, should I take them out or what." I'm planning on going Vortech this winter so I can't wait to see what the combo is like. My biggest fear is traction so I'm definitely going to have to upgrade the tires,

.

08-27-2008, 06:03 AM	#1
roger22 Registered User Join Date: Oct 2007 Location: SOCAL Posts: 118 iTrader: (1)	3.90 Gearset Anybody know where to get a 3.90 gearset new these days, seems they are hard to locate???

08-27-2008, 06:06 AM	#2
SMB350Z DontTazeMeBro Join Date: Feb 2008 Location: Augusta, GA Posts: 248 iTrader: (7)	3.9 and 4.08 Final Drive Kits in Stock! just bought a 4.08 a few minutes ago.... great seller, they also have the 3.9 __________________ -2007 SMB Base- Berk\|AAM\|JWT\|Racing Hart\|Toyo\|Tanabe\|Cusco\|Eibach\|Quaife\|TK\|NRG\|4.08 Gears(Coming Soon)

08-27-2008, 06:21 AM	#4
SMB350Z DontTazeMeBro Join Date: Feb 2008 Location: Augusta, GA Posts: 248 iTrader: (7)	no problem!! __________________ -2007 SMB Base- Berk\|AAM\|JWT\|Racing Hart\|Toyo\|Tanabe\|Cusco\|Eibach\|Quaife\|TK\|NRG\|4.08 Gears(Coming Soon)

08-27-2008, 02:35 PM	#5
Fletch69z Registered User Join Date: Jun 2005 Location: Indiana Posts: 3,754 iTrader: (41)	I've heard good things about Z1 also. I bought mine for $500 shipped (central 20 3.9) from another vender on here but now I can't remember who it was. That was almost a year ago now, hmmm... __________________ JWT Popcharger/3/8ths" Motordyne Plenum Spacer/Cat Delete/CNR Billet Lightweight Pulleys/JWT Lightweight Flywheel/Custom Vibrant Muffled Exhaust/Tanabe GF210 Springs/Tanabe Chromoly Anti-Sway Bars/GT Spec Ladder Brace/Billet Antenna/Debadged/Whited out Lights and Reflectors/Nismo Shift Knob/Sparco 3" 4 Point Harness/BF Goodrich T/A KDW2's/Slotted Rotors/Hawk HPS Pads/SS Braided Brake Lines/ My videos at cardomain: http://video.cardomain.com/Fletch350z

08-28-2008, 12:12 PM	#6
GWord256 Registered User Join Date: Aug 2007 Location: Comanche Peak, TX Posts: 47 iTrader: (0)	How difficult is it to get these installed? I've been considering a new final gear for a while and now that I have a 2nd vehicle this mod has moved up significantly on my list. Where do you get them installed? A good transmission shop, dealer, just any mechanic? __________________ I gots a G!

08-27-2008, 06:08 AM	#3
roger22 Registered User Join Date: Oct 2007 Location: SOCAL Posts: 118 iTrader: (1)	Thanks, that was fast!!!

08-28-2008, 01:40 PM	#7
Axelerate Registered User Join Date: Apr 2003 Location: Virginia Beach, VA Posts: 597 iTrader: (11)	I had a dealer do mine. Just find someone that is comfortable working with rear ends. There's a lot that goes into making sure everything is to spec. __________________ 03 SS Track-Nismo/TC Kline/SPL/Cusco/every bolt on.

08-29-2008, 02:55 PM	#8
Fletch69z Registered User Join Date: Jun 2005 Location: Indiana Posts: 3,754 iTrader: (41)	I was lucky that I had a friend who works as a tech for Subaru and has had a lot of experience swapping gears in rear ends who did it for $100, . I know, it was a hell of a deal. It took him one night and they have run like a dream ever since they were installed last December. It's completely worth $600 (even more if you have to pay more) because the difference is immediately evident. __________________ JWT Popcharger/3/8ths" Motordyne Plenum Spacer/Cat Delete/CNR Billet Lightweight Pulleys/JWT Lightweight Flywheel/Custom Vibrant Muffled Exhaust/Tanabe GF210 Springs/Tanabe Chromoly Anti-Sway Bars/GT Spec Ladder Brace/Billet Antenna/Debadged/Whited out Lights and Reflectors/Nismo Shift Knob/Sparco 3" 4 Point Harness/BF Goodrich T/A KDW2's/Slotted Rotors/Hawk HPS Pads/SS Braided Brake Lines/ My videos at cardomain: http://video.cardomain.com/Fletch350z

08-29-2008, 08:12 PM	#9
Triple8Sol Registered User Join Date: Aug 2004 Location: Seattle, WA Posts: 4,766 iTrader: (214)	I didn't even know there was a 4.08 available. Sounds like a good idea for NA cars. Running the 350 Evo 3.9FD with my Vortech, and love the combo. __________________ STILLEN Stage IV-->VORTECH DG Zenki G35c 6MT on Junction Produce 11's

09-02-2008, 04:39 PM	#12
skk72 Registered User Join Date: Feb 2005 Location: los angeles Posts: 20 iTrader: (1)	are you guys familiar with tomei 3.9 final gear?