Nissan 370Z Forum  

7AT 4.08 gear swap review

I just had the 4.08 gears installed in my 7AT 2011 Z a few days ago. Seb at Specialty Z did the install and did a great job. I had

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain


Like Tree9Likes

Reply
 
LinkBack Thread Tools Display Modes
Old 08-19-2013, 03:00 PM   #1 (permalink)
A True Z Fanatic
 
brucelidat's Avatar
 
Join Date: Jun 2011
Location: temple city, ca
Posts: 2,432
Drives: 2011 370z 7AT GM Sp
Rep Power: 30
brucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond repute
Default 7AT 4.08 gear swap review

I just had the 4.08 gears installed in my 7AT 2011 Z a few days ago. Seb at Specialty Z did the install and did a great job. I had a diff sent directly to their shop so it was all ready and they just had to do a pumpkin swap when I brought my car in. That is definitely the way to do it.

So with the new gears, the engine revs much quicker and smoother. There used to be a lag and sort bogged down revving int he low RPMs until you hit the range where there's actually power. Now the car is always in or very close to that rm range so it's always ready to go. Freeway driving is much nicer now, when I want to accelerate or pass, it just happens, no more laggy revving to the 3k range. Another bonus is that the engine sounds smoother when cruising since I am in the upper 2k to 3k rpm range. I have FI resonated HFCs and CBE and there was a lot more noise when cruising before in the low RPMs. I used to put it in M to raise the RPMs sometimes for the quieter ride. Of all my mods, this is the one I feel the most after install. I had HFCs and CBE installed with a tune all at the same time and the difference in driving feel and fun was less than this.

No review would be complete without stating the negatives as well. Like everyone else has noted, cruise control no longer works (see update below, it is now working) but i rarely ever use that anyway. I'm also losing maybe 2-3 mpg in freeway driving.

A note to those with 2011 and newer models. Mine was the first one newer than 2010 that Seb installed the gears in and I had the Service Engine Soon light come on. The code was p0500 which is Speen Sensor A. Seb chekced I tout and the problem si that there is some kind of miscommunication between the sensor and the ECU. Since theya r enot getting the same reading, it si throwing the light. HOWEVER, this isn't really a problem because it doesn't affect or damage anything. Also, my speedo still works fine and gives me about the same reading as my nav for my speed. Seb can program the ecu to get rid of the light so it's no biggie since it doesn't really affect anything. If I get more info on it form him, I will update this post.

UPDATE:
My cruise control is now working. I guess whatever it was Seb did to fix my Service Engine Soon light also gave me back my cruise control. I tested it to confirm it didn't work right after I had the gears installed. I tried it again tonight for the hell of it and was surprised to find the cruise control was now working. I even turned it off and set it a second time to make sure it wasn't a fluke.

Another UPDATE
I drove from Los Angeles to San Francisco and back this past weekend. I was mostly cruising around 80 and got about 23 or 23.5 mpg for the trip.
__________________
Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

Last edited by brucelidat; 10-23-2013 at 11:09 AM. Reason: update
brucelidat is offline   Reply With Quote
Old 08-19-2013, 03:49 PM   #2 (permalink)
Enthusiast Member
 
Red_Z's Avatar
 
Join Date: May 2012
Location: California
Posts: 332
Drives: A red Z
Rep Power: 14
Red_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant futureRed_Z has a brilliant future
Default

nice I am looking to do the same in the future.

Do you need a 6MT pumpkin to do the swap? Did you find the pumpkin yourself?
Red_Z is offline   Reply With Quote
Old 08-19-2013, 04:52 PM   #3 (permalink)
A True Z Fanatic
 
brucelidat's Avatar
 
Join Date: Jun 2011
Location: temple city, ca
Posts: 2,432
Drives: 2011 370z 7AT GM Sp
Rep Power: 30
brucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond repute
Default

Yeah, you need a MT pumpkin with vlsd if you have a sport. Yeah, Seb can get the gears but not the pumpkin. I found mine on ebay from a '08 350z.
__________________
Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq
brucelidat is offline   Reply With Quote
Old 08-19-2013, 06:52 PM   #4 (permalink)
A True Z Fanatic
 
critical's Avatar
 
Join Date: Oct 2012
Location: Washington
Posts: 1,252
Drives: 09' 370z 7AT
Rep Power: 15
critical has much to be proud ofcritical has much to be proud ofcritical has much to be proud ofcritical has much to be proud ofcritical has much to be proud ofcritical has much to be proud ofcritical has much to be proud ofcritical has much to be proud ofcritical has much to be proud of
Default

First to second must be so fast for you when you launch! It's really fast for me lol.

The 3.692 swap into the 7AT is geared higher than the 4.08 in a manual, minus 5th gear, and you're 10% above that. It'd be cool to compare the two. Do you have any videos? I love the 3.692 in the 7AT. Much better gearing!
FPenvy likes this.
__________________
Quaife w/ gears |Stillen Gen 3|SOLD FI Resonated Test Pipes |SOLD FI 18'' | 25row Stillen Race | Progress 35mm/25mm sways | Swifts/Koni|Volk G25's| Stoptech SS lines||SPL Front/Rear Arms|
critical is offline   Reply With Quote
Old 08-19-2013, 07:11 PM   #5 (permalink)
A True Z Fanatic
 
brucelidat's Avatar
 
Join Date: Jun 2011
Location: temple city, ca
Posts: 2,432
Drives: 2011 370z 7AT GM Sp
Rep Power: 30
brucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond repute
Default

No videos, just had the install done Friday.
__________________
Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq
brucelidat is offline   Reply With Quote
Old 08-19-2013, 10:03 PM   #6 (permalink)
Banned
 
Join Date: Jun 2013
Location: SoCal
Posts: 28
Drives: Slowly :p
Rep Power: 0
7AT_Z is on a distinguished road
Default

How much did he charge to do that if I may ask. PM me if you don't want to say it private. Thanks!
7AT_Z is offline   Reply With Quote
Old 08-19-2013, 11:04 PM   #7 (permalink)
A True Z Fanatic
 
Wonka2581's Avatar
 
Join Date: Nov 2012
Location: Chattanooga, TN
Posts: 3,083
Drives: MY WIFE CRAZY....
Rep Power: 2611
Wonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond reputeWonka2581 has a reputation beyond repute
Default

Subd.....
__________________
"I have nothing to offer but blood, toil, tears and sweat""Winston Churchill"
Wonka2581 is offline   Reply With Quote
Old 08-20-2013, 10:36 AM   #8 (permalink)
A True Z Fanatic
 
ANMVQ's Avatar
 
Join Date: Mar 2011
Location: Framingham MA
Posts: 2,732
Drives: 2014 Q50 AWD
Rep Power: 19
ANMVQ will become famous soon enoughANMVQ will become famous soon enough
Default

is the CEL still on , or can it be recailbrated not to come on. Inspection issues ? No?
__________________
14 Q50 AWD, ARK, ECUTEK (SEB), Takda,
ANMVQ is offline   Reply With Quote
Old 08-20-2013, 12:20 PM   #9 (permalink)
A True Z Fanatic
 
brucelidat's Avatar
 
Join Date: Jun 2011
Location: temple city, ca
Posts: 2,432
Drives: 2011 370z 7AT GM Sp
Rep Power: 30
brucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond repute
Default

Seb turned the light off after confirming it wasn't a real problem and programmed the ECU to not have the light come back on for that reason.
__________________
Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq
brucelidat is offline   Reply With Quote
Old 08-23-2013, 01:31 AM   #10 (permalink)
A True Z Fanatic
 
brucelidat's Avatar
 
Join Date: Jun 2011
Location: temple city, ca
Posts: 2,432
Drives: 2011 370z 7AT GM Sp
Rep Power: 30
brucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond repute
Default

updated my review regarding cruise control for anyone sub'd and interested
__________________
Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq
brucelidat is offline   Reply With Quote
Old 08-23-2013, 03:44 PM   #11 (permalink)
Base Member
 
dthem370's Avatar
 
Join Date: Sep 2009
Location: San Diego
Posts: 163
Drives: Nissan 370Z
Rep Power: 15
dthem370 is on a distinguished road
Default

just talked to Seb, going to go there tomrw and see if he can fix my cruise control problem too. Will update you all on what happens.
dthem370 is offline   Reply With Quote
Old 08-23-2013, 06:52 PM   #12 (permalink)
A True Z Fanatic
 
brucelidat's Avatar
 
Join Date: Jun 2011
Location: temple city, ca
Posts: 2,432
Drives: 2011 370z 7AT GM Sp
Rep Power: 30
brucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond repute
Default

Cool, hope it works out for you too.
__________________
Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq
brucelidat is offline   Reply With Quote
Old 08-24-2013, 12:47 PM   #13 (permalink)
Base Member
 
Join Date: Dec 2011
Location: Indiana
Posts: 86
Drives: 2011 370Z Coupe
Rep Power: 249
kcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond repute
Default

[QUOTE/]The 3.692 swap into the 7AT is geared higher than the 4.08 in a manual, minus 5th gear, and you're 10% above that. It'd be cool to compare the two. Do you have any videos? I love the 3.692 in the 7AT. Much better gearing![/QUOTE]

Do you need to find a used 3.692 gear or can you buy new? I also have the 7AT. I am more interested in the 3.692 than the 4.08 swap. Does it need the same pumpkin from a MT?

Does the 3.692 also cause cruise control to not work?

Thanks.
kcquinn49 is offline   Reply With Quote
Old 08-24-2013, 12:54 PM   #14 (permalink)
A True Z Fanatic
 
brucelidat's Avatar
 
Join Date: Jun 2011
Location: temple city, ca
Posts: 2,432
Drives: 2011 370z 7AT GM Sp
Rep Power: 30
brucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond reputebrucelidat has a reputation beyond repute
Default

If you want the 3.692 gears from a manual, then you will need a manual pumpkin 350z ones work just the same as 370s). I am not sure if you can find them new. You'd have to ask Nissan. Everyone gets them used. If you're not swapping out gears then it'll probably be a straight pumpkin swap. As for cruise control, we got mine to work even with the 4.08 gears so I can't imagine it would be a problem having it work with 3.692.
__________________
Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq
brucelidat is offline   Reply With Quote
Old 08-24-2013, 01:07 PM   #15 (permalink)
Base Member
 
Join Date: Dec 2011
Location: Indiana
Posts: 86
Drives: 2011 370Z Coupe
Rep Power: 249
kcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond reputekcquinn49 has a reputation beyond repute
Default

So if I get a 370z MT pumpkin, it already has the 3.692 gear, I can just swamp pumpkins?
kcquinn49 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
4.08 Gear Install (7AT) Review dthem370 Engine & Drivetrain 150 11-28-2017 04:33 AM
4.08 Frontier gear swap jnaut Engine & Drivetrain 157 01-23-2015 01:47 AM
3.54 Final Drive Swap Review KusoSama Engine & Drivetrain 26 09-26-2014 06:07 PM
3.3 gear swap LafitteZ Engine & Drivetrain 8 02-09-2012 10:22 AM
New Top Gear Review fuzzywuzzy Nissan 370Z General Discussions 28 08-25-2011 09:22 AM


All times are GMT -5. The time now is 04:02 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2