how to achieve firmer shifting?
whats a good way to achieve firmer shifting while on "M" mode or D...
i know for SC3/4 you would shim the valve body to increase pressure? what about the 2GS's tranny? |
i wouldnt mind firming up the shifts in my gs430
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Originally Posted by vwynn
(Post 5399070)
whats a good way to achieve firmer shifting while on "M" mode or D...
i know for SC3/4 you would shim the valve body to increase pressure? what about the 2GS's tranny? This mod would be GREAT if the car is NOT a daily driver.:thumbup: Also, the ONLY other way to make the shifts feel firmer is bring your car to the dealer (or any shop) and have them replace the springs and other WEAR components in the tranny with OEM Lexus parts. I am SURE that our cars shifted A LOT quicker when they were new...~10 years ago. GL!:thumbup: |
The main point when lexus engineers designed our cars is for luxury and comfort. There are ways to make the transmission shift firmer. The hack way is to shim it and increase valve body pressure. But properly modifying the shift solenoids and drilling key areas in the valve body and replacing it with O-rings will provide the best of both worlds.
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hmm i like Rock's idea of replacing the wear items haha.
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If you want to shift a little firmer, all you have to do is replace the accumulator springs with slightly stiffer ones. On mine, I replaced the with solid rods so there's no dampening at all. After that, mod the VB to raise the line pressure. There are different stages that you can do it and it will vary the shifting harshness. You don't have to go full out when tweaking the vb, most people do it because the turbo cars need to shift fast to prevent bouncing the limiter.
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Originally Posted by JeffTsai
(Post 5445910)
If you want to shift a little firmer, all you have to do is replace the accumulator springs with slightly stiffer ones. On mine, I replaced the with solid rods so there's no dampening at all. After that, mod the VB to raise the line pressure. There are different stages that you can do it and it will vary the shifting harshness. You don't have to go full out when tweaking the vb, most people do it because the turbo cars need to shift fast to prevent bouncing the limiter.
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I use solid rods, no springs in my accumulators. I make it so the accumulators have about 1/4 inch of play from the top. That's all you really have to do. I don't have the lengths off the top of my head right now, I'll post them up in 1-2 weeks when I pull out my trans again to do some tweaking.
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Originally Posted by JeffTsai
(Post 5446995)
I use solid rods, no springs in my accumulators. I make it so the accumulators have about 1/4 inch of play from the top. That's all you really have to do. I don't have the lengths off the top of my head right now, I'll post them up in 1-2 weeks when I pull out my trans again to do some tweaking.
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