4.08 Frontier gear swap

jnaut · 10-05-2011, 10:04 PM

Aggie you have a pm

One_Quick_Z · 10-11-2011, 12:03 AM

Anyone do this to the 7AT yet? I really havent seen anyting about it with the auto tranny...

DAN

b1adesofcha0s · 10-12-2011, 08:38 PM

Quote:

Originally Posted by One_Quick_Z

Anyone do this to the 7AT yet? I really havent seen anyting about it with the auto tranny...

DAN

Z_eliminator has it done on a 7AT

oreoleo · 10-11-2011, 12:45 AM

Im considering shipping my diff and gears to a specialist - since i have been unable to find someone good around philadelphia. any suggestions around the east coast?

gbrettin · 10-12-2011, 03:36 PM

I'm interested in doing this on my 7AT too. Information on that would be helpful.

THanks

T_K · 10-12-2011, 08:26 PM

Quote:

Originally Posted by gbrettin

I'm interested in doing this on my 7AT too. Information on that would be helpful.

THanks

7AT
4.924
3.194
2.043
1.412
1.000
0.862
0.771
3.357 (Final Drive)

6MT
3.794
2.324
1.624
1.271
1.000
0.794
3.692 (Final Drive)

Multiply gears by FD.

7AT
16.530
10.722
6.859
4.740
3.357
2.894
2.588

6MT
14.007
8.580
5.996
4.693
3.692
2.931

6MT (w/ 4.083 FD)
15.491
9.562
6.631
5.189
4.083
3.241

Now look at 7AT vs 6MT w/4.083:
7AT 6MT
16.530 15.491
10.722 9.562
6.859 6.631
4.740 5.189
3.357 4.083
2.894 3.241
2.588

The first 3 gears in a 7AT w/ OEM FD is geared more aggressively than a 6MT even with a 4.083 gear. The top 3 gears favor the 6MT, even without a final drive, the gears are closer. Up to 3rd gear the numerical values favor the 7AT, but the 6MT spans the 4-6 in what the 7AT spans with just 4-5.

jdonadio · 10-22-2011, 02:01 PM

did you find info for the gear swap for your 7AT, I'm interested as well....

370Zfeeler · 02-24-2012, 06:28 PM

Quote:

Originally Posted by jdonadio

did you find info for the gear swap for your 7AT, I'm interested as well....

Back from the death!!

Would Also like to know about this gears on 7AT
Anyone would chime in???

Methodical4u · 10-12-2011, 09:01 PM

so for those with the M/T does the sychro rev match still work the same?

esfourteen · 10-12-2011, 09:14 PM

Quote:

Originally Posted by Methodical4u

so for those with the M/T does the sychro rev match still work the same?

if you bothered to read or search the thread you would know that SRM is off by a few hundred RPM as the system is pre-calculated with the factory final drive. With the stock clutch its not very noticeable at all and you wont have any problems*, with a stiffer aftermarket clutch you will likely be so annoyed that you disable it.

*the one issue is going over ~130MPH will cause SRM warning's to appear and the system will disable itself until you turn off the car.

Methodical4u · 10-12-2011, 09:37 PM

Quote:

Originally Posted by esfourteen

if you bothered to read or search the thread you would know that SRM is off by a few hundred RPM as the system is pre-calculated with the factory final drive. With the stock clutch its not very noticeable at all and you wont have any problems*, with a stiffer aftermarket clutch you will likely be so annoyed that you disable it.

*the one issue is going over ~130MPH will cause SRM warning's to appear and the system will disable itself until you turn off the car.

well, I didn't bother to search through the forum... thank you for the answer however.

b1adesofcha0s · 10-12-2011, 09:37 PM

Quote:

Originally Posted by Methodical4u

well, I didn't bother to search through the forum... thank you for the answer however.

Actually it was in the earlier part of this thread....

Methodical4u · 10-12-2011, 10:36 PM

Quote:

Originally Posted by b1adesofcha0s

Actually it was in the earlier part of this thread....

I had just seen on a forum before that it affected the SRM, so I didn't even bother to consider it as a mod.

jdonadio · 10-22-2011, 01:59 PM

Has anyone does this on an AT, and where can you find them?

e30cabrio · 04-21-2012, 08:24 AM

Quote:

Originally Posted by AggieAv8r

agreed - I'm still technically "breaking them in" but I have access to a runway where I'll soon test 'em out. But practically speaking, no, no noticeable difference. The car just feels like it needs to keep going .... so fun to drive now.

On the downside, and I'm hoping maybe jnaut and tranceformer will chime in, I talked to the shop that put em in today. Told him about the whine under light acceleration, just enough drive input to maintain speed, and he acted like there was nothing more he could do - he said the mesh pattern was perfect, and then gave me the dreaded "some gear sets just whine ... can't tune em out"

Told me to drive it for awhile and let everything "seat" and see if it changes any. I'm also going to switch to Redline 75W90 to see if it helps any. But I don't think it will. Any reason to believe that this may work itself out after break in ???? That just doesn't make sense to me ....

So I'm hoping you guys can give me some ammo to go back with ... as far as specific adjustments. Anyone else see this? Any experience with pinion preload adjustments? Mesh patterns that work better than others i.e. more toe, or more heel patterns? Anything that will convince him to break into it again and make an adjustment.

I found this thread (and forum) via a search trying to find if the pinion sleeve and nut came with the gear set.

I have had these and a quaife in my 06 350Z for over a year/10k and just started whining horribly. It started as you described.

My differential was assembled by a shop that had no clue and is now out of business. They did not replace anything but the ring and pinion and apparently did not properly set the preload. It is currently at a shop that only deals in diffs, transfer cases and transmissions.

As I did not want to lose my car I swapped the open base diff back in. WHAT A DIFFERENCE.

Luckily it looks like there was no damage.

282.02 (with a discount) in differential rebuild parts.

10-05-2011, 10:04 PM	#1 (permalink)
jnaut A True Z Fanatic Join Date: Dec 2009 Location: wpb, fl Posts: 1,146 Drives: 09 370z Rep Power: 18	Aggie you have a pm __________________ Best 1/4 mile 12.24 Best mph 114.5_______

10-11-2011, 12:03 AM	#2 (permalink)
One_Quick_Z A True Z Fanatic Join Date: May 2009 Location: Seneca Il Posts: 1,374 Drives: 10 Civic EX Sedan Rep Power: 219	Anyone do this to the 7AT yet? I really havent seen anyting about it with the auto tranny... DAN __________________ -My BRZ with exhaust will decimate all if we overnight parts from Japan- 10 Civic EX Sedan- Current Daily

10-11-2011, 12:45 AM	#4 (permalink)
oreoleo Base Member Join Date: Jan 2010 Location: Philadelphia PA Posts: 54 Drives: 09 Infiniti G37S 6MT Rep Power: 16	Im considering shipping my diff and gears to a specialist - since i have been unable to find someone good around philadelphia. any suggestions around the east coast? __________________ '09 6mtS OB Coupe\|KW V3\|SPC\|Stillen 3G\|Invidia Gemini CB+HFC\|Nismo S/S\|Hotchkis

10-22-2011, 01:59 PM	#14 (permalink)
jdonadio Base Member Join Date: Feb 2011 Location: arizona Posts: 6 Drives: 370z Rep Power: 15	4.08 gears for AT Has anyone does this on an AT, and where can you find them?

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

10-12-2011, 03:36 PM	#5 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,294 Drives: Tricycle Rep Power: 589151	I'm interested in doing this on my 7AT too. Information on that would be helpful. THanks

10-22-2011, 02:01 PM	#7 (permalink)
jdonadio Base Member Join Date: Feb 2011 Location: arizona Posts: 6 Drives: 370z Rep Power: 15	did you find info for the gear swap for your 7AT, I'm interested as well....

10-12-2011, 09:01 PM	#9 (permalink)
Methodical4u A True Z Fanatic Join Date: Jun 2011 Location: Maryland Posts: 1,393 Drives: 11 370 6mt pw w/sp Rep Power: 16	so for those with the M/T does the sychro rev match still work the same?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Anyone here own a Nissan Frontier?	kannibul	Other Vehicles	12	12-08-2009 01:53 PM
Wheel swap question	Z-WHIZ	Wheels & Tires	1	11-16-2009 02:54 PM
Swap 7AT for 6MT	Gabriel77	Nissan 370Z General Discussions	34	08-26-2009 10:09 AM
Just for kicks! R8 exhaust swap	Theatrix	The Lounge (Off Topic)	6	03-03-2009 11:05 PM
Touring Pedal Swap	FairmanZ	Exterior & Interior	12	02-19-2009 04:34 PM