4.08 Frontier gear swap

luigi90210 · 11-30-2012, 05:25 AM

Quote:

Originally Posted by dthem370

Based on my research, SRM will be off by like 300 RPMS for the manuals and people say they don't even realize it that much. There is no fix for that as far as I know. Also, someone reported the SRM will automatically turn off once you exceed speeds around 120MPH, but after turning the car off and back on it works fine again.

The gears (4.08s) will make you accelerate much faster. It can take off a few tenths of your quarter mile time and improve your 60' times.

You will lose top end speed, meaning you can know only go to something like 180mph instead of like 200mph. Realistically I don't think any of us will ever go that fast so that's not much of a concern for me.

You will lose some MPG because your RPMs will be higher (500RPMs higher) when cruising around, especially on the freeway. I personally don't mind it b/c if I was concerned about MPG I wouldn't have bought the Z in the first place.

The hardest thing is keeping traction with the gears from what I read. So make sure if you upgrade the gears to have a good set of tires and a good differential (stock VLSD at the minimum).

I will post more info soon when I create my review.

i definitely look forward to it, i have been toying with the idea recently but the fact that srm will shut off is kind of a downer(not enough to put it off though, it just means i have to learn how to heel and toe), im really interested in how it will increase acceleration, tbh i feel the Z takes off pretty quickly stock granted my last car was a turbo eclipse and the turbo lag on there was pretty bad(i didnt spool until 3.5K)

tranceformer · 11-30-2012, 08:57 AM

Quote:

Originally Posted by dthem370

Based on my research, SRM will be off by like 300 RPMS for the manuals and people say they don't even realize it that much. There is no fix for that as far as I know. Also, someone reported the SRM will automatically turn off once you exceed speeds around 120MPH, but after turning the car off and back on it works fine again.

The gears (4.08s) will make you accelerate much faster. It can take off a few tenths of your quarter mile time and improve your 60' times.

You will lose top end speed, meaning you can know only go to something like 180mph instead of like 200mph. Realistically I don't think any of us will ever go that fast so that's not much of a concern for me.

You will lose some MPG because your RPMs will be higher (500RPMs higher) when cruising around, especially on the freeway. I personally don't mind it b/c if I was concerned about MPG I wouldn't have bought the Z in the first place.

The hardest thing is keeping traction with the gears from what I read. So make sure if you upgrade the gears to have a good set of tires and a good differential (stock VLSD at the minimum).

I will post more info soon when I create my review.

Quote:

Originally Posted by luigi90210

i definitely look forward to it, i have been toying with the idea recently but the fact that srm will shut off is kind of a downer(not enough to put it off though, it just means i have to learn how to heel and toe), im really interested in how it will increase acceleration, tbh i feel the Z takes off pretty quickly stock granted my last car was a turbo eclipse and the turbo lag on there was pretty bad(i didnt spool until 3.5K)

SRM does shut off around 120mph. But it doesn't turn back on after a while, even after a restart.. atleast with my car that's the case.

Yes it does make the car feel faster, but IMO the 1/4 mile times is second place to the 'fun factor' of the 4.08 gears.

And yes, get some good tires!

dthem370 · 12-02-2012, 05:38 AM

Quote:

Originally Posted by Presto

Can you list what all parts you bought and from which vendor?
Are you keeping the stock vlsd or aftermarket LSD like os given or quaife?

I will list the parts and stuff I got when I create my review. I personally kept the stock VLSD but I wish I had the extra money to get a better limited slip. I should be fine though since I will be driving it mostly on the street and my car will see very little track time.

Z eliminator · 12-02-2012, 09:41 AM

your cruse control wll not work if you have a 7 AT

SPOHN · 12-03-2012, 08:45 PM

Where are most of you guys buying your 4.08 gears from? I'm always searching for best price.

B&W_Evader · 12-04-2012, 10:33 AM

Just saw this thread for the first time... I love this stuff

I swear I smelled gear oil when looking at those pictures with the diff torn appart.

luigi90210 · 12-05-2012, 02:14 AM

Quote:

Originally Posted by SPOHN

Where are most of you guys buying your 4.08 gears from? I'm always searching for best price.

i think nissan has the cheapest gears, they are off the frontier 2.5 i believe, dont quote me on that though

SPOHN · 12-05-2012, 06:56 AM

^ thanks. I'll look it up.

atx370z · 12-08-2012, 04:53 PM

Just to add my .02 to this thread... I've been running 4.08 gears in my Z for about 6 months now and love them. Acceleration is GREATLY improved. I don't notice it much now since I've had them for a while, but I'm sure if I were to take a spin in a Z with stock rear end, I would notice.

My gas mileage dropped 2mpg... But I do have a little bit of a lead foot shifting at around 4-5k each gear.

SRM works, but not as good as with the stock rear end. Downshifting while decelerating is smooth.. Anything else is a little "jerky" until you get used to it. Also during high speed runs (120-130mph+) the SRM will shut itself completely off and won't come back on until you turn the car off for a bit then turn it back on. Not sure why... Not a big deal.

Top speed is hardly affected... I can still hit 140mph easily (and quickly) with room to go. I don't have big enough balls to see what the speed is at red line in 6th gear... But I know it's FAST.

Traction was definitely an issue with the OEM Bridgestone RE050's... Even with 305's in the rear. Since I upgraded to the RE-11's... I hardly have any traction problems and the car pulls like a freight train. Best tires, in my opinion, hands down.

That is all...

dthem370 · 12-08-2012, 04:59 PM

Quote:

Originally Posted by atx370z

Just to add my .02 to this thread... I've been running 4.08 gears in my Z for about 6 months now and love them. Acceleration is GREATLY improved. I don't notice it much now since I've had them for a while, but I'm sure if I were to take a spin in a Z with stock rear end, I would notice.

My gas mileage dropped 2mpg... But I do have a little bit of a lead foot shifting at around 4-5k each gear.

SRM works, but not as good as with the stock rear end. Downshifting while decelerating is smooth.. Anything else is a little "jerky" until you get used to it. Also during high speed runs (120-130mph+) the SRM will shut itself completely off and won't come back on until you turn the car off for a bit then turn it back on. Not sure why... Not a big deal.

Top speed is hardly affected... I can still hit 140mph easily (and quickly) with room to go. I don't have big enough balls to see what the speed is at red line in 6th gear... But I know it's FAST.

Traction was definitely an issue with the OEM Bridgestone RE050's... Even with 305's in the rear. Since I upgraded to the RE-11's... I hardly have any traction problems and the car pulls like a freight train. Best tires, in my opinion, hands down.

That is all...

Glad to hear that man. I'm putting my RE-11s on next week and I just got the gears yesterday. Good to know that the traction will be better.

atx370z · 12-08-2012, 04:59 PM

Quote:

Originally Posted by SPOHN

Where are most of you guys buying your 4.08 gears from? I'm always searching for best price.

Just get the gear and install kit from Z1... You'll pay a little more vs piecing it together yourself, but at least you'll know you're getting everything you need for a successful install.

gtabaz · 01-26-2013, 02:59 PM

Can someone list the parts needed for these mods and maybe where to get them =] Thanks!

Dwnshift · 01-26-2013, 09:48 PM

We have hit well over 170...but we rev a little higher with ours

You should be able to purchase the set through Nissan Motorsports parts as well.

G37Sam · 04-08-2013, 07:55 AM

Quote:

Originally Posted by gtabaz

Can someone list the parts needed for these mods and maybe where to get them =] Thanks!

+1 I'd really appreciate that

blumango · 11-09-2013, 10:34 PM

Hi,

Thanks for the part numbers here!

Do you happen to know the part number for a sport manual pumpkin too?

Quote:

Originally Posted by jnaut

the diff housing are the same between, the difference is inside , the carrier ( where the ring gear bolts up). you would need to change that carrier plus the stub shaft and axle if yourgoing to run lsd or get a manual rear end out of a 350,g35,g37,370z. then do the gear swap. now if you dont want to go as agressive you can put in the stock gears out of a manual 370z, as the auto 370z has 3.3 axle ratio and the manual has 3.6.in the f.s. section there a stock lsd with gears. he prolly has everything you need to do 3.6 ratio swap for minimal money.

1. Both lsd and non-lsd manual 370z take the same gears. no mod needed to do the 4.08 ratio swap. straight install.

get parts from 2006 nissan frontier xe 2.5l manual trans

1. 38100-0c760 ring/pinion
2. 38165-0c020 pinion crush sleeve
3. 43262-01p1a pinion nut
4. 38154-0c000 spacer between pinion bearing and drive gear
5. 38120-ec000 pinion bearing
6.gasket maker
7.gear oil

optional parts( i did not use these but the installer might request that you repalce them)
8. 38140-0c000 pinion bearing
9. input shaft seal

12-02-2012, 09:41 AM	#139 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	your cruse control wll not work if you have a 7 AT __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

12-03-2012, 08:45 PM	#140 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	Where are most of you guys buying your 4.08 gears from? I'm always searching for best price. __________________

12-04-2012, 10:33 AM	#141 (permalink)
B&W_Evader Track Member Join Date: Aug 2011 Location: CA Posts: 972 Drives: slower than before Rep Power: 387	Just saw this thread for the first time... I love this stuff I swear I smelled gear oil when looking at those pictures with the diff torn appart. __________________ \|RIP\|6spd-sport\|OSG-LSD\|XP8\|RBF600\|Eibach Sways\|RE-71R\|FI-34Row\|Gen3-CAI\|Yaw P.S.\|

12-05-2012, 06:56 AM	#143 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	^ thanks. I'll look it up. __________________

12-08-2012, 04:53 PM	#144 (permalink)
atx370z Track Member Join Date: Aug 2010 Location: Austin, TX Posts: 637 Drives: 10 370Z T/S M6 Rep Power: 16	Just to add my .02 to this thread... I've been running 4.08 gears in my Z for about 6 months now and love them. Acceleration is GREATLY improved. I don't notice it much now since I've had them for a while, but I'm sure if I were to take a spin in a Z with stock rear end, I would notice. My gas mileage dropped 2mpg... But I do have a little bit of a lead foot shifting at around 4-5k each gear. SRM works, but not as good as with the stock rear end. Downshifting while decelerating is smooth.. Anything else is a little "jerky" until you get used to it. Also during high speed runs (120-130mph+) the SRM will shut itself completely off and won't come back on until you turn the car off for a bit then turn it back on. Not sure why... Not a big deal. Top speed is hardly affected... I can still hit 140mph easily (and quickly) with room to go. I don't have big enough balls to see what the speed is at red line in 6th gear... But I know it's FAST. Traction was definitely an issue with the OEM Bridgestone RE050's... Even with 305's in the rear. Since I upgraded to the RE-11's... I hardly have any traction problems and the car pulls like a freight train. Best tires, in my opinion, hands down. That is all... __________________ Berk HFC & CBE, Stillen G3's, AMS Crank Pulley, JWT Flywheel, 4.08 Gears, UpRev, H&R Springs and 20mm Spacers, JDM Rear Fog, EVO-R Front Lip and CF Upper Cover, 305's

01-26-2013, 02:59 PM	#147 (permalink)
gtabaz Base Member Join Date: Jan 2012 Location: New York Posts: 171 Drives: 2011 370z GunMetal S Rep Power: 13	Can someone list the parts needed for these mods and maybe where to get them =] Thanks!

01-26-2013, 09:48 PM	#148 (permalink)
Dwnshift Track Member Join Date: Feb 2012 Location: Cincy Posts: 717 Drives: NISMO 370Z RC Rep Power: 14	We have hit well over 170...but we rev a little higher with ours You should be able to purchase the set through Nissan Motorsports parts as well.

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