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11-08-2017, 12:00 PM | #29 |
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I don't know you or how you really drive and have not been in your car. That said, in my 13k miles on my '15 BRZ the transmission has behaved just fine. Now, it does NOT like to be hurried and you have to give the synchros time to get their work done, particularly when the car's cold. But if I shift deliberately and firmly it will do exactly what I want, every time. Now, mine may take a dump on me tomorrow, but I don't think your experience is the norm.
For the money an LS swap will cost, and the aggravation and heartache it will probably cause, I recommend selling the BRZ and finding a low mileage Cayman. If you fit in them (I don't) I think you'll be ahead in both money and happiness.
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11-08-2017, 12:16 PM | #30 | |
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I'm not sure what you mean give the synchros time to get their work done, when you're in neutral, they are not working until you make a move to get into gear. If you're shifting fast and deliberately even after waiting for a moment in neutral you are not giving them time to get their work done, at best the primary of your transmission is slowed down by mechanical friction and the viscosity of the oil making for an easier shift, but that is also the purpose of double clutching, to force that processes hand a little bit. That's been the best for me to make it behave. And we all definitely know not to waste our time getting into gear, because that's how you surely get any transmission to grind. I can try shifting a little slower. I've had mixed results with that. I'm not exactly shifting like speed racer though. I have noticed some of the same things you did though, it's 1. /significantly/ happier warm and 2. seems to like being shifted briskly and with a lively force. It still bangs a little bit going in but its much less severe. I still fear premature wear. |
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11-08-2017, 12:27 PM | #31 | |
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11-08-2017, 03:00 PM | #32 |
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With the old transmission, I had to double clutch every single gear, up or down, and I'm pretty good at it too. With the broken trans if I was off by like 1% it would still grind for 4th, the others were slightly more forgiving.
With the new trans I'm trying to give it a chance to see if it behaves right on a single clutch because that's what synchros are supposed to let you do, but I might end up just always double clutching. I am double clutching on downshifts always, I do that even in perfectly working cars. When I do double clutch with the new transmission, it obviously behaves perfect like you would expect. We're just talking about single clutch for the roughness. I guess there's no law that it has to be smooth for single clutching, I'm just shocked that it isn't given how many great transmissions there are out there that do not suffer from this problem, complicated though it may be. If it isn't behaving when it warms up outside next year, I'm just going to go back to double clutching all the time. There's really nothing else for it at that point short of an engine swap. Who knows... maybe I am just spoil't on BMW/honda/porsche transmissions, never had to replace one ever. My E39 at like 250k miles has finally started to get a kind of grumpy 2nd gear, but that's pretty normal for a manual of that mileage, and even then it's still working better than the BRZ. |
11-08-2017, 03:06 PM | #33 | |
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I drive mine year round, in Canada, at sub zero temperatures and have never had a single grind (that wasn't my own fault). Are you blipping on the double clutched up shifts?
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11-08-2017, 03:12 PM | #34 | |
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I always blip the right amount, and then usually after I get the gear selected I'll blip a second time to get it back for releasing the clutch (if it's necessary, hard to explain I do it by feel sound and intuition mostly, you know how it is). If I happen to be braking and need to down shift, I will do a full heel-toe blip, but I'm not a very agressive driver, and very rarely need to do that on the street. I never never never downshift without matching the RPM on the primary and then let the clutch jerk the car to slow down, hate it when people do that. |
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11-08-2017, 03:14 PM | #35 | |
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@Tcoat will attest to my clutch setup. I have my pedal lowered but I also have a corresponding mod to increase the throw at the clutch fork. The two changes cancel each other out to maintain effective disengagement. When your clutch pedal is fully released, where does it sit relative to the brake pedal? If clutch and brake pedals are about even, the PO lowered it in vain attempt to gain some feel. Also, in my sig is a a link to the manuals graciously served by a fellow owner. In there are instructions to adjust the clutch pedal to factory spec. Try that before you wear out your new transmission.
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11-08-2017, 03:17 PM | #36 |
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Actually I had another question for you-- There's been some talk about the perrin transmission support. Is this somehow supposed to do something about this problem? They claim it helps with the 'notchiness' which I'm trying to determine if that's the uneducated way of saying slight grind as banging it into gear, or something totally different. Perhaps that's worth looking into? idk.
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11-08-2017, 03:21 PM | #37 | |
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Just off the top of my head I feel like the clutch and the brake pedal are dead even when it's just sitting, and I can bottom the clutch pedal against the floor (at least that's what it feels like, never got down on my hands and knees to check) and that's what I'm considering the fully disengaged position. But that would make me very happy if adjusting the clutch would fix this because that is kind of what I had originally thought as well. Way too weird for the gears to be this cranky across the board. But It's been to three dealerships and none of them said a word about it after driving it on the interstate no less, so I guess I naively was considering that data point as well. |
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11-08-2017, 03:28 PM | #38 | |
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Make sense?
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11-08-2017, 03:37 PM | #39 | |
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It's no theory. I've adjusted my travel not to just simple disengagement but enough to be able to shift easily. I actually raised my pedal some after learning about the effect. It made quite a difference. And I'm an older fart who thought he'd seen it all. I learned about it in a discussion here with @Stang70Fastback.
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11-08-2017, 03:46 PM | #40 | ||
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11-08-2017, 04:11 PM | #41 | |
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Sorry. I can see how my post read that way.
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11-08-2017, 04:17 PM | #42 |
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It is cheap and effective enough to give it a shot though.
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