4.08 Gear Install (7AT) Review

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.

jchammond · 11-28-2017, 04:33 AM

Quote:

Originally Posted by Juso

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.

I recently acquired a 13' Nismo diff with 3.69 gearing & factory vlsd; it's a direct bolt.
The stub shafts came with it & everything went right together.
No launching in 1st gear/unless rubber is heated at the dragstrip; cause once they break loose in 1st,2nd is immediately on the redline & then you're shifting to 3rd (still drifting) & then it will finally catch traction & bark the tire's going into 4th!
Couldn't imagine going lower than those,,,as mine came with the factory 3.357 gear's-but i did add a Quaife helical locker for better traction.
Phone Z1 Motorsport's & they can guide you on what you would need to perform this swap.
my rpm's at 75mph went from 2550 to 2800 cruising...fuel milage 25mpg+ on last 400mi. road trip cruising 65-75 (pending speed limit)
Good-Luck!

kcquinn49 · 02-02-2013, 09:38 AM

Quote:

Originally Posted by kmkraft12

Good review, but I have never heard of a stock 370z that can get up to 180 let alone 200.

If your car had the power, I'm sure this statement means that with the 4.08 gears you are rev limited to 180 vs 200 mph. That is the way I read it.

04-04-2017, 10:01 PM	#2 (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

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05-20-2017, 06:04 AM	#3 (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	#4 (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.