4.08 Gear Install (7AT) Review

visconti · 05-15-2013, 07:59 AM

Quote:

Originally Posted by Z eliminator

When you drive the 7AT with the 4.08 gears. does the car bog a little during the gear changes after it changes gears ?
let me know , as i think that mine is closing the trottle bodies as it changes gears.
Its driving me nuts .

Z

Never heard of that.

Where are you located ?

binary0x01 · 06-04-2013, 01:35 PM

To OP:

I'm gonna do the same, at the same place in a few days

brucelidat · 07-15-2013, 03:54 PM

OP, was Specialty Z able to do it all in one day? id you find the manual diff yourself, or did Seb help on that front? I am pretty interested in this, but would really like to do it all in one shot and not have to leave the car overnight so it can be incognito without the GF fiance knowing I dropped 2k for a new mod...

brucelidat · 07-15-2013, 03:54 PM

Also, did you get a tune after this or do we need it?

brucelidat · 07-15-2013, 04:07 PM

If a manual diff was hard to come by and I decided to drop a Quaife LSD in there along with the gears, would I get the one for the manual, auto, or vlsd? I have a 7at with sport package. Just wondering if I would need one for manuals since the gears need a manual diff for install.

G37Sam · 07-15-2013, 04:09 PM

A tune is not needed for this, if you send an MT pumpkin and the gears there in advance you'll save a lot of time.

NickD · 07-15-2013, 05:07 PM

Quote:

Originally Posted by brucelidat

If a manual diff was hard to come by and I decided to drop a Quaife LSD in there along with the gears, would I get the one for the manual, auto, or vlsd? I have a 7at with sport package. Just wondering if I would need one for manuals since the gears need a manual diff for install.

I have a 7AT non sport (so open diffs) I had to do a manual quaife with gears and about 6 shims

brucelidat · 07-15-2013, 08:00 PM

about how much of a hit are taking in mpg in normal driving?

Red_Z · 07-15-2013, 09:39 PM

I have a 7AT base Z, so if I am going to do the gear and LSD the same time. I should be able to to use my own pumpkin, but I need to purchase a Manual LSD + the 4.08 gears?

NickD · 07-16-2013, 08:51 AM

Quote:

Originally Posted by Red_Z

I have a 7AT base Z, so if I am going to do the gear and LSD the same time. I should be able to to use my own pumpkin, but I need to purchase a Manual LSD + the 4.08 gears?

If you have a base 7AT (non sport) then all you need is the manual Quaife Differential and 4.08 Gears (yes you use your pumpkin). When its in the pumpkin they will have to measure lash back to determine the shims needed for proper fitment. My car needed about 6 shims at the price of $20 each. FML

NickD · 07-16-2013, 08:52 AM

Quote:

Originally Posted by brucelidat

about how much of a hit are taking in mpg in normal driving?

I dont feel a difference in gas mileage, but with the boost in acceleration i tend to hit the pedal harder so that lowers my MPG lol

chuckie311 · 07-16-2013, 10:23 AM

i was talking to Seb about this when i got tuned a few weeks ago..he says he needs 3 or 4 days to do the job..
he can gets the gears and install kit but you need to get the Diff yourself..
any question just call and talk to him..

Quote:

Originally Posted by brucelidat

OP, was Specialty Z able to do it all in one day? id you find the manual diff yourself, or did Seb help on that front? I am pretty interested in this, but would really like to do it all in one shot and not have to leave the car overnight so it can be incognito without the GF fiance knowing I dropped 2k for a new mod...

dthem370 · 07-16-2013, 10:37 AM

Quote:

Originally Posted by brucelidat

OP, was Specialty Z able to do it all in one day? id you find the manual diff yourself, or did Seb help on that front? I am pretty interested in this, but would really like to do it all in one shot and not have to leave the car overnight so it can be incognito without the GF fiance knowing I dropped 2k for a new mod...

I had dropped off all my stuff when I got them in and he was able to do the gear swap during his own time. Then when I had my appt with him he pretty much just swapped out the entire differential. Swapping up the differentials doesn't take that long to do but the gear swap is time consuming. Drop of your parts to him and just schedule an appt for a different day.

Quote:

Originally Posted by brucelidat

about how much of a hit are taking in mpg in normal driving?

Street drivingI actually think I am getting better MPG, but on the freeway I went from like 27-29MPG to like 24ish MPG. It's not that big of difference at all. Check out the videos I posted to see the RPM's comparison from before and after the gears.

1slow370 · 07-26-2013, 03:13 AM

i have a 6mt rear pumpkin with quaife installed in the for sale section if anyone has an lsd auto pumpkin it's a straight trade.

megalapagas · 07-26-2013, 04:16 AM

Can this work if I later FI my Z? Or its strictly N/A? I have a 7AT touring with sport package?

06-04-2013, 01:35 PM	#47 (permalink)
binary0x01 Track Member Join Date: Jun 2012 Location: Idaho Posts: 892 Drives: 2012 6-SPEED 3.7L Z Rep Power: 15	To OP: I'm gonna do the same, at the same place in a few days __________________ Tune (by Seb@SpecialtyZ) -- Upgraded Parts List : When in doubt, use brute force; if it doesn't work, you aren't using enough.

07-15-2013, 03:54 PM	#48 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	OP, was Specialty Z able to do it all in one day? id you find the manual diff yourself, or did Seb help on that front? I am pretty interested in this, but would really like to do it all in one shot and not have to leave the car overnight so it can be incognito without the GF fiance knowing I dropped 2k for a new mod... __________________ 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

07-15-2013, 03:54 PM	#49 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	Also, did you get a tune after this or do we need it? __________________ 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

07-15-2013, 04:07 PM	#50 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	If a manual diff was hard to come by and I decided to drop a Quaife LSD in there along with the gears, would I get the one for the manual, auto, or vlsd? I have a 7at with sport package. Just wondering if I would need one for manuals since the gears need a manual diff for install. __________________ 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

07-15-2013, 04:09 PM	#51 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 21	A tune is not needed for this, if you send an MT pumpkin and the gears there in advance you'll save a lot of time. __________________ '14 Viper GTS '08 RB'd G37S - Sold

07-15-2013, 08:00 PM	#53 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	about how much of a hit are taking in mpg in normal driving? __________________ 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

07-15-2013, 09:39 PM	#54 (permalink)
Red_Z Enthusiast Member Join Date: May 2012 Location: California Posts: 332 Drives: A red Z Rep Power: 16	I have a 7AT base Z, so if I am going to do the gear and LSD the same time. I should be able to to use my own pumpkin, but I need to purchase a Manual LSD + the 4.08 gears?

07-26-2013, 03:13 AM	#59 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	i have a 6mt rear pumpkin with quaife installed in the for sale section if anyone has an lsd auto pumpkin it's a straight trade. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

07-26-2013, 04:16 AM	#60 (permalink)
megalapagas Enthusiast Member Join Date: May 2013 Location: McAllen,TX Posts: 457 Drives: '10 370Z Tour A/T Rep Power: 13	Can this work if I later FI my Z? Or its strictly N/A? I have a 7AT touring with sport package?

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