7AT 3.692 Gear Review

1slow370 · 03-25-2014, 04:16 PM

g37 sedan pumpikins do not work only the coupes. the sedans have 3bolt driveshafts

Felix 808 · 03-25-2014, 11:59 PM

Quote:

Originally Posted by DjSquall

Where can I get just the gears? My z is up on a hoist with an open pumpkin waiting for a new axle stub... Quaife diff going in

If you have an Auto, you can't put the lower gears in because Nissan decide to use a wacky pumpkin scheme instead of going with a typical carrier split that most other manufactures use.

Quote:

Originally Posted by 1slow370

g37 sedan pumpikins do not work only the coupes. the sedans have 3bolt driveshafts

All you have to do is change the flange. Yes you will need to ensure you put proper pre-load on the bearings, but it's not that big of a deal, especially if you are changing the differential (inside part). it would be a good idea to freshen it up with new bearings anyway, so as stated earlier, the pinion drive flange difference is not a problem, just swap it with the one you have.

1slow370 · 03-26-2014, 04:13 AM

It is when most guys expect to just bolt it on, swapping the flange requires a new crush sleeve which means setting the pinion preload and most guys doing this swap dont want to mess with setting the pinion too loose or tight and burning up the bearings and gears. And the layout on the inside of an automatic pumpkin is the exact same as the manual pumpkin just some stuff is shifted a little and i believe the id of the ring gear is a little smaller.

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Felix 808 · 03-26-2014, 09:52 AM

Quote:

Originally Posted by 1slow370

It is when most guys expect to just bolt it on, swapping the flange requires a new crush sleeve which means setting the pinion preload and most guys doing this swap dont want to mess with setting the pinion too loose or tight and burning up the bearings and gears. HTCONE using Tapatalk

True, but I was answering in the question in the aspect that you could use the pumpkin, but yes it would not be a direct swap

Quote:

Originally Posted by 1slow370

And the layout on the inside of an automatic pumpkin is the exact same as the manual pumpkin just some stuff is shifted a little and i believe the id of the ring gear is a little smaller.

Sent from my HTCONE using Tapatalk

Of course it looks the same inside, but when setting up gears, those .001's " make a big differnce in longevity & noise/whine (or lack there of). I don't see you installing 4:08's in an auto pumpkin with out grinding the gears to make them set up correctly. $.02 YMMV

1slow370 · 03-26-2014, 11:37 AM

I know its different its just when you said wonky i was just saying the auto and the manual imploy the same design just different clearances.

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Felix 808 · 03-26-2014, 11:48 AM

Quote:

Originally Posted by 1slow370

I know its different its just when you said wonky i was just saying the auto and the manual imploy the same design just different clearances.

Sent from my HTCONE using Tapatalk

It's wacky, because they don't use carrier splits like the majority of differnetal manufactures do

1slow370 · 03-26-2014, 12:01 PM

If you mean majority by murican solid axles then sure the rest of the world makes diffs like this now.

camaro diff

toyota/lexus/subaru diff

new 5.0 differential

now the gear splits
Ford 9" circa 1960

nissan h233b (made until about 2003)

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jchammond · 02-21-2015, 03:45 AM

Looks like a little quicker out the hole,,,don't know ️if you can post on here but you should be able to hit speed limiter closer to 7500

jchammond · 02-21-2015, 03:49 AM

My stock 336 diff goes 0-limiter in 30sec,,, speedo shows 158, but I know it suppose to be 155,,,, just quits pulling @7000rpm 5th

Roca_PR · 02-03-2016, 10:29 AM

Going to install 3.69's on my 7AT today

xavier · 12-02-2018, 02:03 PM

Hi,

Lot of people, with 7AT 370z, change the final drive (9,97% --> 47/14 to 48/13) … I am interesting but …
The 7 automatic 370z gearbox have "downshift rev matching" - DRM , it permit synchro between engine and gear box during downshift.

Does pumpkin is from a 370z, 350z, manual transmission... ?
on the pumpkin, there are 2 sensors for ABS and speed.
on 350z there are 46 teeth for ABS.
on 370z there are 48 teeth for ABS.
I don't know if thoots number needed, and is respect for 370z ABS.
the only problem can come from final drive (9,97% --> 47/14 to 48/13).

Does "downshift rev matching" function change or run or not?
any problem, impact or not ?
all is ok to 7500 rpm for change gear?
do you make ecu reflash for solve "downshift rev matching" problem ?
at how many prm, what RPM value it not run?
what happen?
any gear box problem ?
Else, all is ok..

Thanks
Best regards
Xavier

Felix 808 · 12-02-2018, 02:23 PM

Q: Does pumpkin is from a 370z, 350z, manual transmission... ?

A: Yes Either 350/ 370 Manual diff will work, but only the 370 have the 3.69, I believe 350 = 3.55 gears

Q: on the pumpkin, there are 2 sensors for ABS and speed.
on 350z there are 46 teeth for ABS.
on 370z there are 48 teeth for ABS.

A: I would get the 370 axles as the computer is set up to read the tone rings already.

Q: Does "downshift rev matching" function change or run or not?
any problem, impact or not ?

A: No impact, continues to work. You maybe able to reset your ECU to get Cruise control to work again, I was.

HTH

jchammond · 12-02-2018, 09:42 PM

I swapped a pumpkin from a 13' Sport 3.69 to an 11' base touring 3.36 & everything worked great....except the cruise would not allow you to go above 3k in 7th gear.
Unsure your mods; but be prepared to roast some tires

jchammond · 12-02-2018, 09:45 PM

I was told that pending year model; that some had threaded stub shafts & some had threaded cv axles,,,heard a few people having to drill them out. Un-sure year model's

Felix 808 · 12-03-2018, 10:16 AM

Quote:

Originally Posted by jchammond

I was told that pending year model; that some had threaded stub shafts & some had threaded cv axles,,,heard a few people having to drill them out. Un-sure year model's

No need to drill them out, just get the right bolts. Mine had theaded axles, but the one I changed out had not threaded axels. Nuts & bolts solved the issue.

03-25-2014, 04:16 PM	#46 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	g37 sedan pumpikins do not work only the coupes. the sedans have 3bolt driveshafts __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

03-26-2014, 04:13 AM	#48 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	It is when most guys expect to just bolt it on, swapping the flange requires a new crush sleeve which means setting the pinion preload and most guys doing this swap dont want to mess with setting the pinion too loose or tight and burning up the bearings and gears. And the layout on the inside of an automatic pumpkin is the exact same as the manual pumpkin just some stuff is shifted a little and i believe the id of the ring gear is a little smaller. Sent from my HTCONE using Tapatalk __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50 Last edited by 1slow370; 03-26-2014 at 04:17 AM.

03-26-2014, 11:37 AM	#50 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	I know its different its just when you said wonky i was just saying the auto and the manual imploy the same design just different clearances. Sent from my HTCONE using Tapatalk __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

03-26-2014, 12:01 PM	#52 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	If you mean majority by murican solid axles then sure the rest of the world makes diffs like this now. camaro diff toyota/lexus/subaru diff new 5.0 differential now the gear splits Ford 9" circa 1960 nissan h233b (made until about 2003) Sent from my HTCONE using Tapatalk __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50 Last edited by 1slow370; 03-29-2014 at 01:27 AM.

02-03-2016, 10:29 AM	#55 (permalink)
Roca_PR Base Member Join Date: Dec 2015 Location: Puerto Rico Posts: 16 Drives: 10 370Z Gray Aut. Rep Power: 9	Going to install 3.69's on my 7AT today blueranger and OMYG37S like this.

02-21-2015, 03:45 AM	#53 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 57 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684394	Looks like a little quicker out the hole,,,don't know ️if you can post on here but you should be able to hit speed limiter closer to 7500

02-21-2015, 03:49 AM	#54 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 57 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684394	My stock 336 diff goes 0-limiter in 30sec,,, speedo shows 158, but I know it suppose to be 155,,,, just quits pulling @7000rpm 5th

12-02-2018, 02:03 PM	#56 (permalink)
xavier Base Member Join Date: Aug 2018 Location: france Posts: 10 Drives: 370Z 7AT Rep Power: 3361	Hi, Lot of people, with 7AT 370z, change the final drive (9,97% --> 47/14 to 48/13) … I am interesting but … The 7 automatic 370z gearbox have "downshift rev matching" - DRM , it permit synchro between engine and gear box during downshift. Does pumpkin is from a 370z, 350z, manual transmission... ? on the pumpkin, there are 2 sensors for ABS and speed. on 350z there are 46 teeth for ABS. on 370z there are 48 teeth for ABS. I don't know if thoots number needed, and is respect for 370z ABS. the only problem can come from final drive (9,97% --> 47/14 to 48/13). Does "downshift rev matching" function change or run or not? any problem, impact or not ? all is ok to 7500 rpm for change gear? do you make ecu reflash for solve "downshift rev matching" problem ? at how many prm, what RPM value it not run? what happen? any gear box problem ? Else, all is ok.. Thanks Best regards Xavier

12-02-2018, 02:23 PM	#57 (permalink)
Felix 808 A True Z Fanatic Join Date: Oct 2011 Location: Camarillo, CA Posts: 1,063 Drives: 2011 PW/Grey T/S 7AT Rep Power: 2806	Q: Does pumpkin is from a 370z, 350z, manual transmission... ? A: Yes Either 350/ 370 Manual diff will work, but only the 370 have the 3.69, I believe 350 = 3.55 gears Q: on the pumpkin, there are 2 sensors for ABS and speed. on 350z there are 46 teeth for ABS. on 370z there are 48 teeth for ABS. A: I would get the 370 axles as the computer is set up to read the tone rings already. Q: Does "downshift rev matching" function change or run or not? any problem, impact or not ? A: No impact, continues to work. You maybe able to reset your ECU to get Cruise control to work again, I was. HTH Memphis370Z likes this. __________________ Semper Fi Μολὼν λαβέ

12-02-2018, 09:42 PM	#58 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 57 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684394	I swapped a pumpkin from a 13' Sport 3.69 to an 11' base touring 3.36 & everything worked great....except the cruise would not allow you to go above 3k in 7th gear. Unsure your mods; but be prepared to roast some tires __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

12-02-2018, 09:45 PM	#59 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 57 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684394	I was told that pending year model; that some had threaded stub shafts & some had threaded cv axles,,,heard a few people having to drill them out. Un-sure year model's __________________ 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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