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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 02-21-2008, 11:07 AM   #1
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Transmission strength??

Hey guys, I recently bought a new turbo upgrade kit....turbo, fuel pump, injectors, tune, spark plugs(performance), forged pistons, stg. 3 clutch, alum flywheel.

Do I have to worry about the transmission being able to handle the load?

If so, what else do I need to get?

Made me curious because my friend has a 300awhp scooby wrx(yes i know our cars are completely dif) but he was talking about how he can't really upgrade more unless he wants to replace to whole tranny. just got me wondering.
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Old 02-21-2008, 11:20 AM   #2
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If you can afford it there is a verys strong gearset made by Quaife, sold by Maptun.

There are several people making 500+bhp on stock gearboxes. How long it lasts all depends on how you drive.
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Old 02-21-2008, 11:22 AM   #3
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Quote:
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How long it lasts all depends on how you drive.
x2

The trans in my 9k has held up fine to 15,000 miles of stage 4 and my 900 has held up fine so far while I've owned it.

Remember stuff like cv joints, inner drivers, etc will suffer as well...
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Old 02-21-2008, 11:29 AM   #4
 
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x2 too...

There are people on here who have gone through several trannies with mildly upgraded power, and other who are pushing 400+ ft/lbs wtq on stock boxes....

If you like to drag, or dig the rush of downshifting from 4th to 2nd a lot, then start the NTF (new tranny fund) now...
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Old 02-21-2008, 11:30 AM   #5
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There are some simple changes you can make inside if you have it apart to make it more durable. The biggest saving is a Quaife lsd so you don't get the shock loads when spinning the tires. On my Vig with 400 at the wheels it is fine. More than that and maybe you reduce the life. Also use the factory 0063 fluid. It is best.
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2.0 GOOSE 500whp + 8500rpm = 11.06 @125 E85
Viggen 439whp / 447tq 12.43 @114 on Gt2871.64, (Now 511whp Gt3076)
Nordic E85 9-3 SS Aero 320hp / 350ftlbs
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Old 02-21-2008, 11:37 AM   #6
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There are some simple changes you can make inside if you have it apart to make it more durable. The biggest saving is a Quaife lsd so you don't get the shock loads when spinning the tires. On my Vig with 400 at the wheels it is fine. More than that and maybe you reduce the life. Also use the factory 0063 fluid. It is best.
I will soon be making 400whp but I'm in the middle of rebuilding my transmission with LSD. Out of all the products that are out their you still think OEM fluid is that best? What about to break in the LSD, I know redline has LSD break in fluid (Limited Slip Friction Modifier). Did you even bother with this?
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Old 02-21-2008, 11:38 AM   #7
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i don't plan on going further than 400bhp.

i do like the 4th to 2nd drop but i double clutch whenever i do that, so should i be okay?
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Old 02-21-2008, 11:47 AM   #8
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i have stg 3 and i've beat the shit out of mine for 25k miles and it shifts like it was brand new, car has 140k on it to. But i do go threw engine/tranny mounts about every year.
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Old 02-21-2008, 11:52 AM   #9
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What about to break in the LSD, I know redline has LSD break in fluid (Limited Slip Friction Modifier). Did you even bother with this?
I believe that the friction modifier additive is for clutch type LSD's. And it's not a break in fluid. It's required for normal use.
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Old 02-21-2008, 11:58 AM   #10
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i have stg 3 and i've beat the shit out of mine for 25k miles and it shifts like it was brand new, car has 140k on it to. But i do go threw engine/tranny mounts about every year.
I can assure you of this chris kills his tranny, i'm surprised it lasted this long.

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I believe that the friction modifier additive is for clutch type LSD's. And it's not a break in fluid. It's required for normal use.
ahh noted. I still wonder about the OEM fluid vs other brands though.
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Old 02-21-2008, 01:55 PM   #11
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Good lord. i met taht feels like heaven

what kind of turbo are you running nick?

GT2871R?

Quote:
Originally Posted by GenuineSaab View Post
There are some simple changes you can make inside if you have it apart to make it more durable. The biggest saving is a Quaife lsd so you don't get the shock loads when spinning the tires. On my Vig with 400 at the wheels it is fine. More than that and maybe you reduce the life. Also use the factory 0063 fluid. It is best.
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Old 02-21-2008, 02:20 PM   #12
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You don't need special fluid with the quaife it is a gear type. Not friction clutch type.

Call me I have a few cars on Gt2871 and others.. 5 customer Viggens here in the workshop. baby one is step3 that the swedes are playing with now in the dyno.
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2.0 GOOSE 500whp + 8500rpm = 11.06 @125 E85
Viggen 439whp / 447tq 12.43 @114 on Gt2871.64, (Now 511whp Gt3076)
Nordic E85 9-3 SS Aero 320hp / 350ftlbs
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Old 02-21-2008, 05:04 PM   #13
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Quote:
Originally Posted by GenuineSaab View Post
There are some simple changes you can make inside if you have it apart to make it more durable. The biggest saving is a Quaife lsd so you don't get the shock loads when spinning the tires. On my Vig with 400 at the wheels it is fine. More than that and maybe you reduce the life. Also use the factory 0063 fluid. It is best.
what is the difference between 0063 fluid and the normal fluid....http://www.elkparts.com/product_info...oducts_id/1900
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Old 02-22-2008, 01:13 PM   #14
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Quote:
Originally Posted by GenuineSaab View Post
You don't need special fluid with the quaife it is a gear type. Not friction clutch type.

Call me I have a few cars on Gt2871 and others.. 5 customer Viggens here in the workshop. baby one is step3 that the swedes are playing with now in the dyno.
Damnit i wanna move to Springfield...

I about to go stage 4 (plans are by summer so i have time) But i was thinking about getting a rebuild to make sure that thing is fresh and durable.
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Old 02-22-2008, 07:57 PM   #15
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I've heard the new style crush sleeve makes a big difference. Making sure the gear teeth are line up properly and bearing preload is set correctly are critical. A lot of the trannies actually fail by differential failure so that's one reason to upgrade to a Quaife or Sellhom.
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