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Modifying the 5spd; Can it be done?
Topic Started: Aug 3 2009, 10:34 AM (397 Views)
20vLevin
Stage 4
Hey guys,
Is it possible to modify the 5spd by changing the ratio's on the 5th gear? I hate going along the motorway at 4k all the time, if i could get a 6spd then i would go down that route, was just wondering if its possible to change the 5th gear to a higher ratio and leave the rest?

Cheers, Scott
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mike ae111
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new ae111 coming soon
you should be doing it at just over 3 lad at 120kph
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20vLevin
Stage 4
3k is about 100kph in my car, when the speedo is on 130kph or 80mph its at 4k which is about the speed i go on the motorway.
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DreadAngel
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Han Lue
Issue is that if you change your ratios, you may stretch it too far and being a small 1.6L engine, you'll have trouble accelerating...
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20vLevin
Stage 4
Yeah its not the final drive i would want to change just the 5 gear ratio, so would accelerate normally and just rev real low in 5th, don't even know if its possible just wondered.
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DreadAngel
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Han Lue
I "think" its still possible to purchase for the C56 GBox a close ratio set but not a wide ratio lol =P

But you could ask a transmission specialist like PPG or Pfinzer, somebody along those lines but you've gotta have $$$
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AceSniper
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Global Moderator

you can use 5th gear off a ee90? or some old starlets with small engines and cynos's? they have a .7? 5th vs the .81? in ours and from a c series box.

If your interested let me know Ill try find my files as I did work it all out.
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AceSniper
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.725 5th vs std .81

c51, c53, c57, c58, c151, c153, c155
http://en.wikipedia.org/wiki/Toyota_C_transmission
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Levin BZR
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Ace I want some TRD close ratio set!! Where can I find one? For me c56 gearbox!
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20vLevin
Stage 4
Mmm cool, the c153 is the gt turbo starlet so hopefully there will be one lying around in the uk.

I notice the ratio is the same as the 6th gear in the c160 box, could the 6th gear be used to replace my 5th gear?

Also what rpm is the engine doing at say 130kph/80mph in the 6th gear on a bzr etc? I know the final drive is slighty different on the six speed. Is the higher number the faster it will accelerate?

Cheers for all your advice so far.
Scott
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Levin BZR
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20vLevin
Aug 4 2009, 10:31 AM
Mmm cool, the c153 is the gt turbo starlet so hopefully there will be one lying around in the uk.

I notice the ratio is the same as the 6th gear in the c160 box, could the 6th gear be used to replace my 5th gear?

Also what rpm is the engine doing at say 130kph/80mph in the 6th gear on a bzr etc? I know the final drive is slighty different on the six speed. Is the higher number the faster it will accelerate?

Cheers for all your advice so far.
Scott
3500rpm
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mike ae111
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new ae111 coming soon
mine does 3300 at 120kph and 4000 at 140kph
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twincam 20
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pwr hngry
Aug 4 2009, 10:49 PM
mine does 3300 at 120kph and 4000 at 140kph
what?? you should go to spec savers, 3300 @ 100kmh, and 4000rpm @ 120km ive been in your car
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