Forced Induction & 7AT 370z Info
 

There seems to be a lot of people wanting to discuss the 7AT and forced induction and now there is a dedicated thread for Q&A, info, build links, etc.

Factory Transmission:
Nissan/Infiniti JATCO JR710E 7 Speed Automatic transmission: Link

Torque Rating:
RE7R01A: 400Nm (295lb)
RE7R01B: 600Nm (442lb)

Wider gear ratio range, increased gear steps:
http://www.jatco.co.jp/ENGLISH/image...trait01_en.gif

Improved fuel efficiency:
http://www.jatco.co.jp/ENGLISH/image...trait02_en.gif

Transmission Details:
http://upload.wikimedia.org/wikipedi...tco_JR710E.jpg
http://www.transakpp.ru/images/akpp/NI_RE7R01A_1.jpg
http://www.transakpp.ru/images/manuals/JR710_shem.jpg
http://www.transakpp.ru/images/manuals/JR710_sol.jpg

Ratio Charts:
https://lh3.googleusercontent.com/-p...2520Charts.JPG

Technician Guide: Link
Technical Service Information: PDF Link
GTM Automatic Transmission: PDF Link

Current vehicles used in:
-Nissan Skyline Coupe (Infiniti G37 coupe)
-Nissan Skyline Crossover (Infiniti EX)
-Nissan Fairlady Z (370z)
-Nissan Fuga (Infiniti M)
-Nissan Skyline Sedan (Infiniti G37 sedan)

Nissan:

7 Speed Automatic Transmission (310C0-Z34002) - $8,085.49

Fast Intentions: Know details of upgrade so far - Upgrades include: Excedy Clutch Packs & our Billet Aluminum Flex Plate (SFI approved.)

Level10: Please contact them directly as their website only lists 350z transmission, but have completed multiple built 370z transmissions.

Level10 Built from Scratch - Details

Build details: The BulletProof Transmission upgrade is rated to 750hp. Once upgraded all gears will be capable of performing under boost, the upgrade includes the Level 10 High energy internals, Super pump upgrade, BulletProof ValveBody and BulletProof Torque Converter upgrade. Price: $6,596 + $1,000 Refundable Core Charge

Level10 Send Yours In - Details

Build details: The BulletProof Transmission upgrade is rated to 750hp. Once upgraded all gears will be capable of performing under boost, the upgrade includes the Level 10 High energy internals, Super pump upgrade, BulletProof ValveBody and BulletProof Torque Converter upgrade. The turnaround time is 3-5 business days. Price: $3,995




Known finished builds Turbo (TT & T):

Tao168:

2009 370z 7AT GTM Stage 1 TT at 6PSI - 310kw (416HP) More Info

Rod Saraiva:

2010 370z 7AT Greddy TT at 7.5PSI - 480HP & TQ More Info

Beastz:

2010 370z 7AT GTM Stage 2 TT 4.2L Stroker at 7.5PSI - 456HP & 398TQ More Info Build Thread

Unknown Owner:

2xxx 370z 7AT GTM Stage 2 TT at 11 PSI - 558HP & 452TQ More Info

G37sHKS:

2009 G37s 7AT GTM Stage 1 TT at 8.8PSI - 448HP & 382TQ More Info

Wattles:

2012 G37 IPL 7AT GTM Stage 1 TT at 13PSI - 556HP & 418TQ More Info

Blue370tt:

2009 370zz 7AT GTM Stage 2 TT at 9.5PSI - 456HP & 380TQ More Info

neveucd:

2009 370z 7AT GTM Stage 2 TT at 9.4PSI - 460HP & 370TQ More Info

Cycy89:

2011 370z 7AT Fast Intentions Stage 4 TT at 13.8PSI - 620HP & 557TQ More Info

Blueranger:

2010 370z Roadster 7AT Fast Intentions TT at 14.9PSI - 663HP & 575TQ More Info

Known finished builds Supercharger (Single & Dual):

OKC370Z:

2009 370z 7AT Stillen SC at 8PSI - 389HP & 290TQ More Info Additional

Zuperman_370:

2009 370z 7AT GTM Stage 2 SC at 8PSI - 460HP & 348TQ More Info

JWillis72:

2009 370z 7AT Stillen SC at 8PSI - 406HP & 302TQ More Info

Jamaica:

2009 370z 7AT GTM Stage 2 SC at 10PSI - 504HP & 362TQ More Info

Perf.Des:

2009 370z 7AT Stillen SC at 9PSI - 419HP & xTQ More Info Journal

future370zzz:

2010 370z 7AT Stillen SC at 9.8PSI - 436HP & 344TQ More Info

Chuy:

2009 370z 7AT Stillen SC at 7.2PSI - 400HP & 320TQ More Info

Ramirez_751:

2010 370z 7AT Stillen SC at 12 PSI - 469HP & 357TQ More Info

__________________________________________________ _____________
OUT OF BUSINESS:

GTM: The GTM transmission upgrade takes advantage of better friction discs from OEM D-0530-31 to GTM D-0880-88 which allows for a better heat capacity resistance (35% over stock). Clutch friction plate surface area by increasing the number of clutches from 32 to 44, increased torque holding capacity by up to 40%, and separator plates specifically made from high-quality steel to ensure durability.

GTM Automatic 7AT Press Release
http://www.the370z.com/forced-induct...rbo-build.html

TRANSMISSION COOLER - $400
GTM Stage 3 Transmission Upgrade - $5,397
GTM Stage 4 Transmission Upgrade - $6,773

Add core charge: $2,000-$2,500

7.5PSI too

Thanks, will add that to this and the finished builds thread.

Just as a heads up 310 kW is 416 HP for us dumb Americans

I know I had you cross mine off the list but it was 481hp and 427tq on an 7AT at 9.5 psi.
Only saying that to show the tranny CAN handle the hp & tq. I know a lot have said I didn't "drive" the car but those around KC know better:tup:.
I put the kit on my car at 2600miles on the car and I'm taking it off right now at 20,800miles.
Before the tranny was tuned (somewhat) I noticed I was slipping between 3rd and 4th. It was actually upreving before shifting into 4th gear. After some tweeking to the shift points I never had a problem again. I also never drove the car hard in the automatic side.

My question to the ones that had their tranny blow up on them..Was it tuned? If so how long did it last after the tune?

How did they tune it ? what was different in the tune ?

thanks

Z

Hmm. Definitely curious to learn more about the apparent failure rate and failure vs power/torque levels.

Today I'm up the presure to 0.8, and at night I'm going to test it :D

Does G37 with 7AT count as well?

Subed. I'm f. I. As well with auto. 490whp 400wtq. Uprev tune and uped line pressure. 6000 miles with no problems.

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[QUOTE=Z eliminator;2139712]How did they tune it ? what was different in the tune ?

I was sent emails (tunes) until I felt it was better. Noticed a lot of the tunes had really hard shift points but as we went along those issues disappeared. No slipping or the engine revving up before it would shift to the next gear. Uprev can and does do these and your tuner should be able to do this as well.

Could you post all your details in this thread for me, will add you to the list so others known. :tup:
http://www.the370z.com/forced-induct...ed-builds.html

how hard have you pushed yours with the 7AT that its still holding up good with no transmission mods besides line pressure?

I hammer on it multiple times every time I drive it. So far so good. Trans cooler is only mod.

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That's good to know. Some of these performance places say otherwise lol

My goal of I go FI is 500-550whp

Never had the Trans cooler on my AT7. I would try to allow the boost to build before putting the hammer down. Was able to break it loose on dry pavement at 50mph in 3rd almost all the time. At the same I was always worried about blowing up the tranny running it hard but the old girl held up.

When it is below 40 degrees my car will do this at 65 70 mph

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Hey you for got me.

390 HP 285TQ 6.5 PSI one failed trans. Getting a stage 4 build trans from GTM and an aluminum drive shaft. Trans cooler with temp bypass vale also installed since new

just wait till you drive the built tranny, its different from the stock unit, you will love it.

Z

Ur tranny failed at 285tq?????

Is it honestly worth dumping 20k into a TT kit and a transmission? For that 20k plus selling my Z I can have a decent down payment on a gtr lol

He probably had a bum tranny from the start.

Well im hoping to go 12.01 or 11.99's all motor with the built tranny. present time is 12.342. and the built GTM is going to give me at least 3 to 4 th's in the 1/4 mile and ive only tested the first 2 shifts under full throtle. 11.9s are just as fast as a 09 GTR,
with the stage 2 giving me around 500 rwhp low 11'1s for sure. the stage 3 with meth on my built motor 550 +. going to be a great drag race with a GTR. up here they cost 127,000 dollars with tax in.

Z

Less talk more action.

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I can get a 2013 GTR with 100 miles on it for under 90k from a dealer I know right now lol plus exhaust, intake, tune on a gtr is major HP instantly

I'm still greatly impressed with what you've done so far with your Z. Those times are awesome for all motor.

There was a reason....:stirthepot:

So with a good tune and a Trans cooler, the Trans should hold up pretty well?

Just from my experience seems to be yes. I got 6000 miles on mine with no issues. But I also take good care of my car. I don't beat the hell out of it. But I do red line her on a regular basis. Just stay out of 5th through 7th gears in boost and you should be fine.

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Can I ask this 7AT Boosted group... In your honest opinion is a proper tune, tranny cooler and possibly a VB upgrade good enough for AT to hold the boost?

Again just your opinion based on personal experience :tiphat:

I'll let u know when I boost mine lol.

Yes

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is it safe to take a stock trans on a drag strip? lol

I have

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Just make sure they tune your tranny as well. It helps out a ton. It might be the reason mine lasted as long as what it did, when I had it. They are still fun to drive.

Uprev?

tuner used my uprev last week to adjust my transmission.

Sweet. I live an hour and a half away from uprev HQ I'll just pay a visit there.

Trust me it was worth doing it. The shifting (in the manual side) became more responsive and the shifts were a lot stiffer.

I have just rebuilt the first 2 posts, and have added a bunch of new information. Mostly about the factory transmission and a link to a PDF file & a link to a technician book.