2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Making a N/A trans stronger?

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Old Jul 28, 2002 | 01:42 PM
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Talking Making a N/A trans stronger?

Does anyone know where i could get my N/A transmission rebuilt but made to handle more HP. Want to get a t2 transmission but not a the other stuff needed to swap it out.
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Old Jul 28, 2002 | 01:46 PM
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If your just worried about your clutch slipping with basic intake, exhaust, ported engine, etc.. - then just put in a stronger clutch.

If your planning for boost, then I wouldn't go above 185ft-lbs of torque for a daily driver.
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Old Jul 28, 2002 | 01:48 PM
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no i plan on a turbo and porting hopefully over 200 hp
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Old Jul 28, 2002 | 01:57 PM
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easiest thing to do (if you really REALLY don't want to swap the TII rear end...) would be to fit a TII transmission and a custom/modified propshaft
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Old Jul 28, 2002 | 01:58 PM
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Or u could always do the whole swap....
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Old Jul 28, 2002 | 02:17 PM
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unless the TII internals fit inside the n/a casing, probably not.

swap to TII tranny. You'll be better off in the long run if making alot of torque.
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Old Jul 28, 2002 | 02:19 PM
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NA trans is not as weak as everyone thinks. Right now my problem is a clutch that slips everytime I get on the fun pedal. That is the weak point in the stock NA drivetrain.
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Old Jul 28, 2002 | 03:04 PM
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so get the t2 trans and driveshaft get that fabbed to work with my GXL diff and it should be good.
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Old Jul 28, 2002 | 03:06 PM
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so arron cake do you think you have over 200 hp, because everyone is telling me the N/A trans wont handle over that.
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Old Jul 28, 2002 | 03:17 PM
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Trust me it's weak
broke 3 N/A trans in period of 3 months
with my TII engine in the NA drivetrain GXL
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Old Jul 28, 2002 | 04:15 PM
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so kabooski are you still using the GXL diff and halfshafts what did you convert driveline wise
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Old Jul 28, 2002 | 07:58 PM
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kabooski runs GXL driveline with a TII engine... (so, N/A flywheel (I think), N/A tranny, N/A diff and halfshafts)

kabooski: If i got this wrong... sorry
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Old Jul 28, 2002 | 09:34 PM
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so I dont need the t2 flywheel or clutch p plate just the trans and driveshaft and it will work fine?
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Old Jul 28, 2002 | 09:51 PM
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autocrash
thats correct

Unfortunaly The GXL has seen her last days
she was a GREAT car tho
Soon to see junk yard heaven

But The Engine that was in her, is now in a TII Body I'm building with all the stronger driveline
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Old Jul 29, 2002 | 12:12 AM
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You mean that you can actually put a T2 tranny into an N/A?
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Old Jul 29, 2002 | 12:14 AM
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Ive heard from a shop <rotory motorsports> that the TII tranny will bolt up to the NA engine but something about the pilot shaft will not fit into the NA. Just what Ive heard. I really was concidering a full swap, but buying a TII is a lot more feasable. well for me.
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Old Jul 29, 2002 | 11:42 AM
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Originally posted by Eric Henry
You mean that you can actually put a T2 tranny into an N/A?
Yup, but it'll slow you down.... unless you are running a turbo motor (or an N/A that breaks trannies on a normal basis... )

Originally posted by speederx7@yahoo.com Ive heard from a shop <rotory motorsports> that the TII tranny will bolt up to the NA engine but something about the pilot shaft will not fit into the NA
It'll fit assuming you use the TII flywheel... the engine blocks are basically the same...
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Old Jul 29, 2002 | 12:36 PM
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Rebuild your stock tranny, use quality bearings, have the internals Barrier coated and Cryo'd.
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Old Jul 29, 2002 | 12:38 PM
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Don't use a mega-clutch. If the clutch is weak it can't shock the trans and cause it go blow.

(which I suspect is why aaron's turbo hasn't spewed a tranny yet...)
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Old Jul 29, 2002 | 03:02 PM
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Originally posted by suprfast7
so arron cake do you think you have over 200 hp, because everyone is telling me the N/A trans wont handle over that.
I refuse to make any power-related claims until I put the 3" exhaust on and dyno the car. However, the answer is most likely yes. Note: I currently have a clogged cat, and am only boosting to like 5PSI. Before the cat clogged, I could get 10PSI which was enough to cause serious clutch slipping and traction problems.

(which I suspect is why aaron's turbo hasn't spewed a tranny yet...)
Ah, how little you know. I plan to make a "Tina Status" post pretty soon and explain all...
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Old Jul 29, 2002 | 09:02 PM
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UH-oh.......

I prefer to make the weak link in the chain something replaceable.... better to smoke clutches and eat up tires, than to have the weak link be the trans. Trannies are more expensive than clutches or tires...
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Old Jul 29, 2002 | 10:54 PM
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Is the TII tranny a hell of alot heavier or what? I have future plans of some serious power and if the motor goes, I want to move to a turbocharged engine. Why spend alot of money on a transmission that i won't always be able to use.
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Old Jul 29, 2002 | 11:59 PM
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Quote:
Yup, but it'll slow you down.... unless you are running a turbo motor (or an N/A that breaks trannies on a normal basis... )

Quote:
Is the TII tranny a hell of alot heavier or what? I have future plans of some serious power and if the motor goes, I want to move to a turbocharged engine. Why spend alot of money on a transmission that i won't always be able to use.

The TII tranny won't slow you down. Although it is a bit heavier it is a close ratio 5 speed so you have a 5th gear that is useful for performance not just MPG.

TII tranny ratios:
1st- 3.483
2nd- 2.015
3rd- 1.391
4th- 1.000
5th- 0.762

NA tranny ratios:
1st- 3.475
2nd- 2.002
3rd- 1.366
4th- 1.000
5th- 0.697
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Old Jul 31, 2002 | 04:28 PM
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Okay, so I guess I stand corrected on that one... I've always heard it would slow you down (I didn't mean it would slow you down significantly though... )
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Old Jul 31, 2002 | 04:35 PM
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I am not positive on this but I thought the N/A trannies had a .711 ratio. Could you show me the source of your info. I would think the tubo you have the taller 5th gear.
Thanks
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