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Jerkiness from 1st to 2nd (FIXED).

Old May 17, 2008 | 01:06 AM
  #1  
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Jerkiness from 1st to 2nd (FIXED).

I had to solve this issue, it bothered me at like no tomorrow! I decided to drive the car until it was smooth (trying different ideas/techniques)! When going from first to second (any gear at that) before full release of the clutch, apply a small or large (speed depending) amount of gas creating a seamless shift! The clutch was being overloaded and bogging down for those of you who first complained about this issue. I hope this helps as I'm driving seamlessly now, smoother than my CVT when paying complete attention lol. Take care guys, goodnight!
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Old May 17, 2008 | 05:12 AM
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..
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Old May 17, 2008 | 05:21 AM
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That's called double clutching, and when you do that you are doing the synchros job... Which is where the problem is, so of course it will be seamless. That doesn't correct the problem either, it just works around it.
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Old May 17, 2008 | 09:31 AM
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^That's not double clutching, that's just blipping the throttle while the clutch is pressed in, kind of like rev matching for downshifts. Double clutching is a technique that involves pushing the clutch in, moving the shifter into neutral, letting the clutch out, pushing the clutch back in, selecting the next gear, and then blipping the throttle before letting the clutch back out. This matches the layshaft speed so the gears can mesh without the use of synchros. The clutch is in and out twice instead of once, hence the term "double clutch."

This is a techique used for race cars with dog box trannies that don't have synchros and old trucks that don't have synchros. Completely unnecessary on a modern transmission with synchros. Now on the other hand, basic rev matching and heel/toe for downshifts is definitely necessary for smooth downshifts without overweighting the front end of the car, but that only involves pressing the clutch in once, and as you downshift you blip the throttle to match the rpms before letting the clutch out. Rant over.

Last edited by STi2EvoX; May 17, 2008 at 10:15 AM.
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Old May 17, 2008 | 09:39 AM
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^well said
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Old May 17, 2008 | 09:40 AM
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Originally Posted by Resist the syst
I had to solve this issue, it bothered me at like no tomorrow! I decided to drive the car until it was smooth (trying different ideas/techniques)! When going from first to second (any gear at that) before full release of the clutch, apply a small or large (speed depending) amount of gas creating a seamless shift! The clutch was being overloaded and bogging down for those of you who first complained about this issue. I hope this helps as I'm driving seamlessly now, smoother than my CVT when paying complete attention lol. Take care guys, goodnight!
I wouldn't call that a fix. You should not have to do that period
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Old May 17, 2008 | 10:18 AM
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^There is nothing wrong with the car kobi. Every manual transmission car is a little lurchy going into 2nd if you let the rpms drop while the clutch is pressed in. All that he is doing is blipping the throttle to make up for the dropped rpms between the 1st to 2nd shift. The same result can be had from shifting quicker and letting the clutch out a bit more slowly.
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Old May 17, 2008 | 11:41 AM
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The 1st --> 2nd shift can't be worse that that in a Subaru... Took me quite a good amount of time to find the right technique for a smooth 1st --> 2nd shift in my Subie. Maybe a current X and former WRX / STi owner can chime in. I would be interested to see.
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Old May 17, 2008 | 01:34 PM
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Am I the only person who actually likes the tranny on the X?
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Old May 17, 2008 | 01:39 PM
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Originally Posted by J5isalive2
Am I the only person who actually likes the tranny on the X?

No...I have no issues. The box is fine it just needs breaking. You want try a gearbox with issues you should drive one of the old 1st gen DSM GSXs with the cable linkage.
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Old May 17, 2008 | 01:46 PM
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Originally Posted by EEVOH
The 1st --> 2nd shift can't be worse that that in a Subaru... Took me quite a good amount of time to find the right technique for a smooth 1st --> 2nd shift in my Subie. Maybe a current X and former WRX / STi owner can chime in. I would be interested to see.
Former STi owner and current X owner right here. The suby was much worse about this but the reasons are a bit different. The sti would drop revs quickly from 1st to 2nd just like the X, but the gears were so short in that car that it was like driving a tractor. The car held so little boost at high rpms that the turbo had to spool all over again once the gears were upshifted and the rpms would drop. Hence the dreaded "subaru bog."

Granted the EVO drops boost a lot as it hits redline it isn't as severe as the sti with it's baby turbo. The mains issue is just short gearing and the high load seen in all cars in 1st gear causes the revs to drop quickly when the load is released and the clutch is pressed in. An old technique to get around this is to blip the throttle while the clutch is pressed during the gear change or just shift quicker and let the clutch out slower.
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Old May 17, 2008 | 02:34 PM
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took me awhile to figure this one out. still learning and almost seamless.
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Old May 17, 2008 | 04:13 PM
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I never said I didn't like the transmission, I think it's great just took a little getting used to. And since I drive it that way now it's 110 percent smooth. If I don't then the car jerks no matter how fast you shift or how slow u let the clutch out!
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Old May 17, 2008 | 05:00 PM
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Originally Posted by Resist the syst
I never said I didn't like the transmission, I think it's great just took a little getting used to. And since I drive it that way now it's 110 percent smooth. If I don't then the car jerks no matter how fast you shift or how slow u let the clutch out!
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Old May 17, 2008 | 06:59 PM
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From: VEGAS!
Just got back from my first test drive of an Apex Silver GSR SSS and I don't see what everyone is complaining about! I've been driving an automatic for the last 6+ months and I hopped in thinking it was going to be all "notchy"...not one bit! Seriously, this is WAY better than the tranny on my old Evo IV (stock that is). Plus, it's just as nice as any Evo 7 or 8s I've driven. BTW, I had a nice long test drive (about 10 miles), never went over 4k rpm, but I left with a huge grin on my face. I think I'm about to give up on the MR and just buy a GSR...FTW!!
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