4.08 Gear Install (7AT) Review

NickD · 05-30-2014, 08:42 AM

Quote:

Originally Posted by 1slow370

You will also need the bearings and seals and crushwasher and all the other little pieces for installing the gears.

I wish we could just sticky "Rear-ends are precision gear assemblies and NOTHING inside them is drop in. You will need bearings, seals, lots of shims, crush washers and other stuff, as well as significant labor time at a shop that specializes in this work. You CAN do it yourself but you will probably screw it up and turn everything you just bought into expensive paperweights"

All of that stuff comes with the gear (or at least it did when I purchased from Z1). The only thing I needed was shims but you wont really know which ones you need (theres like 12 different ones) until the installer measures with a dialer for lashback. Let the shop deal with that headache lol

NickD · 05-30-2014, 08:43 AM

Quote:

Originally Posted by DjSquall

I have a 7AT into which I just swapped in the quaife diff in place of the factory VLSD. does anyone know if I can fit the 4.08 gears on it?

Did you see my post a few back? lol I did the same thing already.

NickD · 05-30-2014, 08:45 AM

IMPORTANT NOTE FOR 7AT GEAR SWAP WITH QUAIFE DIFFS

YOU NEED TO GET THE QUAIFE DIFF FOR A MANUAL TRANSMISSION OR YOU WILL NOT BE ABLE TO INSTALL THE 4.08 GEAR.

THE QUAIFE DIFF FOR AUTOMATIC TRANSMISSION WILL NOT WORK WITH 4.08s

Taylortoons · 05-30-2014, 01:24 PM

Quote:

Originally Posted by 1slow370

You will also need the bearings and seals and crushwasher and all the other little pieces for installing the gears.

I wish we could just sticky "Rear-ends are precision gear assemblies and NOTHING inside them is drop in. You will need bearings, seals, lots of shims, crush washers and other stuff, as well as significant labor time at a shop that specializes in this work. You CAN do it yourself but you will probably screw it up and turn everything you just bought into expensive paperweights"

Thanks for the advice. Def not doing it myself and didn't want to buy a sport manual pumpkin if it isn't necessary. Sounds like you're saying that if I have the correct install kit (bearings, seals, washers, shims, etc.), the manual quaife lsd and 4.08 would fit the open diff on a base 7AT. Is that right?

1slow370 · 05-30-2014, 01:32 PM

you will want to get a quaife for a manual , base car and whatever gear set you choose (except 3.333) and then you can use your 7at non-sport case and stub shafts with a lot of shimming at that point i would take it to a shop and let them buy everything else you will need

binary0x01 · 06-19-2014, 02:23 PM

Review:

The Quaife diff + 4.08 gears with whiteline bushings and redline gear oil = awesome

L33T Z34 · 08-02-2014, 08:13 PM

I've got a 38301-EH53D for sale.

370Z JT · 02-11-2015, 01:43 AM

I have a 09 370Z auto with VLSD. I want to have 4.08 final with an aftermarket LSD.

Do I need to purchase a manual non-VLSD pumpkin from a base model or a manual VLSD pumpkin from sport package to make this work?

G37Sam · 02-11-2015, 11:24 AM

Both will work, I'd get the Sport just to be safe. If you get non sport you'll need to order the aftermarket LSD with stub axles I believe. Someone correct me if I'm wrong please.

jchammond · 03-22-2015, 06:47 PM

your fuel milage is terrible! i get 25+ with my 370/7at & drive aggressive at times.

robway · 04-04-2017, 09:31 PM

i may be reviving dead thread, but some of the terms used in these kind of threads are unclear to me. when people talk about swapping pumpkins(differentials?)are they simply referring to carrier assembly, or are there other parts necessary? can i simply swap my base auto carrier with the mt vlsd carrier and then install the gears

jchammond · 04-04-2017, 09:57 PM

Quote:

Originally Posted by robway

i may be reviving dead thread, but some of the terms used in these kind of threads are unclear to me. when people talk about swapping pumpkins(differentials?)are they simply referring to carrier assembly, or are there other parts necessary? can i simply swap my base auto carrier with the mt vlsd carrier and then install the gears

on the a/t model's...not many gear ratio's to choose from,,,the "pumpkin"is the center section...unbolt c/v axles,drive shaft,2 speed sensor's,2 mounting bolts & 1 nut from stud through crossmember.
drop it down & you can buy a second one & have it built.
pumpkin's from manual trans. Z's offer gear ratio's from 3.54....up to 4.36:1.
you may have to swap one of the stub shaft's for it to bolt in.
Newer Z's...15' & up...came with a 3.69:1 in some A/T models & 3.92:1 in manual Nismo models.
I swapped the open carrier in my 11' A/T & added a Quaife ATB helical locker....but no lower gears were available at that time...haven't checked in a while.

jchammond · 04-04-2017, 10:01 PM

Mine sitting on jack, about to go back in. "Pumpkin"

Sent from my iPhone using Tapatalk

Ryan998 · 05-20-2017, 06:04 AM

seems good for me because my car have drone at cruising RPM

Juso · 11-27-2017, 09:37 PM

sorry to kinda resurrect this thread, but do i need to buy a manual pumpkin/carrier, or can i just get the diff itself and swap that into my sport auto? because im trying to do the 4.08 FD but im a little confused as to what i need exactly.

05-30-2014, 08:45 AM	#138 (permalink)
NickD A True Z Fanatic Join Date: Mar 2012 Location: Babylon, NY Posts: 1,321 Drives: 10 Z34 Touring Vert Rep Power: 16	*IMPORTANT NOTE FOR 7AT GEAR SWAP WITH QUAIFE DIFFS* YOU NEED TO GET THE QUAIFE DIFF FOR A MANUAL TRANSMISSION OR YOU WILL NOT BE ABLE TO INSTALL THE 4.08 GEAR. THE QUAIFE DIFF FOR AUTOMATIC TRANSMISSION WILL NOT WORK WITH 4.08s __________________ 2010 370z Touring Roadster Monterey Blue My Z Photo Library

05-30-2014, 01:32 PM	#140 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	you will want to get a quaife for a manual , base car and whatever gear set you choose (except 3.333) and then you can use your 7at non-sport case and stub shafts with a lot of shimming at that point i would take it to a shop and let them buy everything else you will need __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

06-19-2014, 02:23 PM	#141 (permalink)
binary0x01 Track Member Join Date: Jun 2012 Location: Idaho Posts: 892 Drives: 2012 6-SPEED 3.7L Z Rep Power: 15	Review: The Quaife diff + 4.08 gears with whiteline bushings and redline gear oil = awesome __________________ Tune (by Seb@SpecialtyZ) -- Upgraded Parts List : When in doubt, use brute force; if it doesn't work, you aren't using enough.

02-11-2015, 01:43 AM	#143 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 379	I have a 09 370Z auto with VLSD. I want to have 4.08 final with an aftermarket LSD. Do I need to purchase a manual non-VLSD pumpkin from a base model or a manual VLSD pumpkin from sport package to make this work? __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

02-11-2015, 11:24 AM	#144 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 21	Both will work, I'd get the Sport just to be safe. If you get non sport you'll need to order the aftermarket LSD with stub axles I believe. Someone correct me if I'm wrong please. __________________ '14 Viper GTS '08 RB'd G37S - Sold

08-02-2014, 08:13 PM	#142 (permalink)
L33T Z34 Banned Join Date: Jun 2010 Location: Ahnald, MO Age: 47 Posts: 387 Drives: 09 K51 G C Bw/S 6MT Rep Power: 0	I've got a 38301-EH53D for sale.

03-22-2015, 06:47 PM	#145 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684395	your fuel milage is terrible! i get 25+ with my 370/7at & drive aggressive at times.

04-04-2017, 09:31 PM	#146 (permalink)
robway Base Member Join Date: Aug 2016 Location: Little Rock Posts: 2 Drives: 2012 370z Touring AT Rep Power: 9	i may be reviving dead thread, but some of the terms used in these kind of threads are unclear to me. when people talk about swapping pumpkins(differentials?)are they simply referring to carrier assembly, or are there other parts necessary? can i simply swap my base auto carrier with the mt vlsd carrier and then install the gears

04-04-2017, 10:01 PM	#148 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684395	Mine sitting on jack, about to go back in. "Pumpkin" Sent from my iPhone using Tapatalk __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

05-20-2017, 06:04 AM	#149 (permalink)
Ryan998 Base Member Join Date: Mar 2016 Location: Edmonton Posts: 48 Drives: 16 370z G41 7At Rep Power: 10	seems good for me because my car have drone at cruising RPM

11-27-2017, 09:37 PM	#150 (permalink)
Juso Base Member Join Date: Apr 2017 Location: Texas Posts: 120 Drives: 12 Nissan 370z GM 7A Rep Power: 9	sorry to kinda resurrect this thread, but do i need to buy a manual pumpkin/carrier, or can i just get the diff itself and swap that into my sport auto? because im trying to do the 4.08 FD but im a little confused as to what i need exactly.

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