997TT Manual Transmission and Differential strength
#1
997TT Manual Transmission and Differential strength
In the 996tt gearbox everyone knew that after 700wtq or so shearing 3rd gear was basically a matter of time along with some other issues that plagued that gearbox such as 2nd gear pop out, 5th gear synchro and wearing of the 4 point bearing into the retaining plate. I know a handful of people who broke every tooth off the 3rd gear in a 996TT including myself. Most people use the 997 GT2 parts or GT parts from Matt to upgrade the 996tt boxes. None of those parts fit in the 997tt box. My 997 is making power in range where 996tt gearboxes were beginning to show fatigue so I am wondering what issues (if any) some other have ran into.
I have also seen a lot of talk about the cast 997 spider gears in the Diff being weaker than the 996 and an inferior design.
Has anyone broken the 997tt manual gearbox ( gears or busted cases) OR the differential?
I have also seen a lot of talk about the cast 997 spider gears in the Diff being weaker than the 996 and an inferior design.
Has anyone broken the 997tt manual gearbox ( gears or busted cases) OR the differential?
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997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#3
GT2 gears do not fit in a 997TT box, they only fit in a 996TT box. In order to do that one would have to use a whole 996TT box. When I had the 997 box out it looks like it has stronger cases tho.
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#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#5
if you have a 6spd 997.1TT and its been running hard on stock gear box with big power you are certainly welcome to come in and say he i got 800hp and my gearbox still hold. I know Enzo just went 196 1/2 mile on a stock drivetrain car.
even the 996tt boxes are hit or miss too, my 3rd gear broke when i was making 900rwhp and i drove that car hard. one thing i learned is its MUCH cheaper and easier to upgrade before stuff breaks, because instead of just replacing the weak links you will be replacing a ton of other stuff that got taken out by the failure.
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#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#6
I am curious on this too.
The thing I find with drivetrains is it is SO dependent on the driver and tires (grip).
Dont put TOO sticky of a tire on it, dont launch it every time you drive it.. and granny shift a little when you dont need every bit of the car.. makes a huge difference.
My stock Z06 trans and clutch was still holding strong after 30K miles (~70K total) even with 625rw. Most people said I wouldnt make 70K miles on a stock clutch with that power.
The only time it was an issue was at the track. Launching it was just too much. as long as it was a 1st gear roll, clutch never slipped. And I only WOT shifted it if I needed to (racing people)... which wasn't all that much in comparison to the daily grind on the car.
The thing I find with drivetrains is it is SO dependent on the driver and tires (grip).
Dont put TOO sticky of a tire on it, dont launch it every time you drive it.. and granny shift a little when you dont need every bit of the car.. makes a huge difference.
My stock Z06 trans and clutch was still holding strong after 30K miles (~70K total) even with 625rw. Most people said I wouldnt make 70K miles on a stock clutch with that power.
The only time it was an issue was at the track. Launching it was just too much. as long as it was a 1st gear roll, clutch never slipped. And I only WOT shifted it if I needed to (racing people)... which wasn't all that much in comparison to the daily grind on the car.
#7
Stock gear box, not a problem with 4k miles over 8xxrwhp. 2 step launchs and brake boosting never had an issue, knock on wood. I havent put a stick tire on the car but, she hooks pretty well on the Invo's. I was going to do the 996tt but why change a working gearbox.
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#8
Stock gear box, not a problem with 4k miles over 8xxrwhp. 2 step launchs and brake boosting never had an issue, knock on wood. I havent put a stick tire on the car but, she hooks pretty well on the Invo's. I was going to do the 996tt but why change a working gearbox.
does your car have the LSD or an open diff?
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#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#9
The weakest link on a high power manual is the clutch and the driver dropping said clutch. If you upgrade it, which most people do, you are reducing wear on the tranny. In other cars with high RWHP guys stay stock till it breaks then change it if its required. There is a guy in AZ that can beef up your tranny if you want. He does work on 997s and 996s
#10
The weakest link on a high power manual is the clutch and the driver dropping said clutch. If you upgrade it, which most people do, you are reducing wear on the tranny. In other cars with high RWHP guys stay stock till it breaks then change it if its required. There is a guy in AZ that can beef up your tranny if you want. He does work on 997s and 996s
staying stock until it breaks is only an option if nothing is currently available but if there are stronger parts available that is a stupid option since when a weak link breaks in the tranny it takes out a bunch more stuff with it. instead of spending 3-4 upgrading you spend 3-4k just to repair and another 3-4k to beef up the parts.
__________________
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#11
yes obviously a stock clutch is the weakest point. i'm talking about 800+ hp cars which have the clutch upgraded or it wouldnt be possible to make that power in the first place...
staying stock until it breaks is only an option if nothing is currently available but if there are stronger parts available that is a stupid option since when a weak link breaks in the tranny it takes out a bunch more stuff with it. instead of spending 3-4 upgrading you spend 3-4k just to repair and another 3-4k to beef up the parts.
staying stock until it breaks is only an option if nothing is currently available but if there are stronger parts available that is a stupid option since when a weak link breaks in the tranny it takes out a bunch more stuff with it. instead of spending 3-4 upgrading you spend 3-4k just to repair and another 3-4k to beef up the parts.
Which is interesting because I think the C4s and Turbo have the same part number on the tranny
#12
Here is the link. I don't mind doing a little research for you. Its about helping someone out
http://californiamotorsports.net/
http://californiamotorsports.net/
#13
yeah so am I.... that doesn't mean it will last. just means it doesnt break right away. my 996tt tranny lasted for thousands of miles at 900whp before 3rd gear broke.
a guy in arizona? never heard .
that doesn't mean the car doesn't need it. you are worried a loose vacuum line is going to blow your motor on stock turbos but think tranny is OK at 800+ hp.....
that is incorrect the C4s tranny is completely different.
99730001050 is the 997TT for non LSD cars. Change the 1050 to 2050 for LSD cars. the N/A cars p/n ends on 01 or 31 rest is the same. it cost about $5k less
honestly i don't need you to do any research for me especially after your hissy fit in that other thread, because unlike you i am aware of using a search function and google. i also know all the major Porsche tranny rebuilders like Roger at CMS (californiamotorsports), Matt at Guard, Bill Rader at BRM, Brian Copans at BMC&G. Guard who makes aftermarket gears for Porsche used by most reputable builders doesn't make them for 997tt yet.
im looking to hear from guys that have done it and like Swole Powell say yeah mines good after such miles at x hp OR the flip side yeah mine failed after so many miles and here is what broke.
a guy in arizona? never heard .
99730001050 is the 997TT for non LSD cars. Change the 1050 to 2050 for LSD cars. the N/A cars p/n ends on 01 or 31 rest is the same. it cost about $5k less
Here is the link. I don't mind doing a little research for you. Its about helping someone out
http://californiamotorsports.net/
http://californiamotorsports.net/
im looking to hear from guys that have done it and like Swole Powell say yeah mines good after such miles at x hp OR the flip side yeah mine failed after so many miles and here is what broke.
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#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
Last edited by Mark @ AIM Performance; 02-03-2015 at 09:00 AM.
#14
I have no Intention of modding to 900+ I'm done having one of the fastest cars in its class.
I wanted light mods. So not understanding your point.
Your lost 3rd gear? Humm. Given your power when where you shifting?
What rpm and speed?
I wanted light mods. So not understanding your point.
Your lost 3rd gear? Humm. Given your power when where you shifting?
What rpm and speed?
#15
You ever talk to Roger? He said he would do my 997. I didnt throw a hissy fit you did. You couldnt grasp that I was asking about the newer tuners. In your world no one would dare to post a new thread after a " compare Dinan vs JimC's Shark" for BMWs. Even though things change.