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Tranny ? #68989 Dec 16, 10:32pm Dec 16, 10:32pm
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Tranny ?
Ok, I blew my GT 5 SPD transmission. And I was wondering since I'm hoping to have turbo by end of summer. How hard would it be to swap in a 6 spd tranny from GTS or stick with another 5 spd?


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Re: Tranny ? [Re: CeLi702] #68990 Dec 16, 10:34pm Dec 16, 10:34pm
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It won't be hard, but it will cost you a pretty penny wave

Re: Tranny ? [Re: CeLi702] #68991 Dec 16, 10:39pm Dec 16, 10:39pm
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Originally Posted by CeLi702
Ok, I blew my GT 5 SPD transmission. And I was wondering since I'm hoping to have turbo by end of summer. How hard would it be to swap in a 6 spd tranny from GTS or stick with another 5 spd?


How did you manage that? I have a friend that downshifted from 5th to second @ 90mph, and bent 14 valves and spun bearings on 3 cylinders... and his tranny wasn't effected at all... I thought that the 5spd in the GT was virtually indestructable.

I would stick with the 5spd, because there have been some cases of the early generation 6spd trannies (2000- 2002) shredding themselves when subjected to more than 280 HP. This could especially be a concern of yours, because I think that the GT motor is capable of producing more torque than the GTS with a forced induction system. (correct me if i'm wrong people)


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Re: Tranny ? [Re: carbon_blue_gt] #68992 Dec 16, 10:42pm Dec 16, 10:42pm
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Originally Posted by carbon_blue_gt
Originally Posted by CeLi702
Ok, I blew my GT 5 SPD transmission. And I was wondering since I'm hoping to have turbo by end of summer. How hard would it be to swap in a 6 spd tranny from GTS or stick with another 5 spd?


How did you manage that? I have a friend that downshifted from 5th to second @ 90mph, and bent 14 valves and spun bearings on 3 cylinders... and his tranny wasn't effected at all... I thought that the 5spd in the GT was virtually indestructable.

I would stick with the 5spd, because there have been some cases of the early generation 6spd trannies (2000- 2002) shredding themselves when subjected to more than 280 HP. This could especially be a concern of yours, because I think that the GT motor is capable of producing more torque than the GTS with a forced induction system. (correct me if i'm wrong people)


interesting about the 6-spd..anyone else here that?

not sure about the gt/gts torque though. to me..its all about displacment and they are the same 1.8L

Re: Tranny ? [Re: CeLi702] #68993 Dec 16, 10:45pm Dec 16, 10:45pm
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I was under the impression that the bore/stroke ratio determined the torque capability of an engine, which, while the 1zz and 2zz have the same displacement, they have a different bore/stroke ratio. I could be wrong, this is now my field of extreme expertise.


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Re: Tranny ? [Re: carbon_blue_gt] #68994 Dec 16, 11:12pm Dec 16, 11:12pm
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Originally Posted by carbon_blue_gt
I was under the impression that the bore/stroke ratio determined the torque capability of an engine, which, while the 1zz and 2zz have the same displacement, they have a different bore/stroke ratio. I could be wrong, this is now my field of extreme expertise.


or you could be right and i could be wrong. not exactly my area of expertise either...but as a rule of thumb displacement is a good place to start when you want to guess on torque.

Re: Tranny ? [Re: CeLi702] #68995 Dec 17, 3:00am Dec 17, 3:00am
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Originally Posted by CeLi702
Ok, I blew my GT 5 SPD transmission. And I was wondering since I'm hoping to have turbo by end of summer. How hard would it be to swap in a 6 spd tranny from GTS or stick with another 5 spd?

The europe & jap spec celica GT have a 6 speed tranny. But I don't know if it is the same as the GTS one. But if it is, it will be easy to fit a 6 speed. Don't know about problems with the 6 speed??? Haven't had any problems so far wink

Re: Tranny ? [Re: CeLi702] #68996 Dec 17, 9:36am Dec 17, 9:36am
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Hmm I've not heard of any 6spd trannys taking a dive because of turbos.from what I understand they are good for 300hp or so.

Re: Tranny ? [Re: Mike00] #68997 Dec 17, 12:16pm Dec 17, 12:16pm
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Originally Posted by Mike00
Hmm I've not heard of any 6spd trannys taking a dive because of turbos.from what I understand they are good for 300hp or so.


i think its how fast the power (hp/torque) is applied. if it is applied to fast..then yes it may break. if the powerband is wider though...its just a matter of not spinning past redline for too long.

Re: Tranny ? [Re: CeLi702] #68998 Dec 17, 10:07pm Dec 17, 10:07pm
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well I been looking at the turbo kits and I might go for internals as well. Which would more than likely put me at 300+ hp. I was also kind of hoping for a 2003-2004 GTS to break down and I get lucky and buy his tranny smile. Anyone done the 5-6spd tranny swap? While keeping the 1zz?


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Re: Tranny ? [Re: CeLi702] #68999 Dec 18, 6:05am Dec 18, 6:05am
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Originally Posted by CeLi702
well I been looking at the turbo kits and I might go for internals as well. Which would more than likely put me at 300+ hp. I was also kind of hoping for a 2003-2004 GTS to break down and I get lucky and buy his tranny smile. Anyone done the 5-6spd tranny swap? While keeping the 1zz?


maybe this doesnt apply..but rod millen had a hard time putting a 6-speed tranny in the original 5-speed is300. just an opinion..but if rod millen said it was difficult..good luck thumbsup

also good luck on getting 300 horses out of a gt with a turbo...what internals are you planning? that is very, VERY difficult to do. (but yeah..its possible)

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