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The mkiv Supra Owners Club

Problem getting into 2nd gear on hard shift


Guest kwiktoy

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Guest kwiktoy

Hope someone can help. I have a MkIV turbo 6 speed, 61 mm single conversion. I recently changed out the stock clutch to a Stage 3 clutch and since then I have problems getting into 2nd gear during a hard high revving shift. It's impossible to get a decent launch at the strip. No problems whatsoever in normal driving, even in fairly enthusiastic mode. I also find it difficult to get into reverse sometimes and occasionally have to stop the engine and then put it in gear and then restart it. Friends of mine say it's the syncros but the box never grates and I never had any problems before I changed the clutch. The shop that sold me the Stage 3 also resurfaced the flywheel (yes, they know what they're doing). They said they took off about as much as they would do before recommending a new flywheel. I am wondering if this might have anything to do with my problem. Any advice would be much appreciated. Thanks!

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I've tried adjusting the clutch at the pedal. I don't think the problem is there. There is no creep of the car with the pedal down in gear and the engagement distance is within Toyota spec. I agree that it seems that the clutch is not disengaging but why only upon drag starts at high revs? On normal spirited road shifts, it's fine. Anyone else got any ideas? Thanks.

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If you were to dismantle the clutch and check the pressure plate thickness, and the geo of the diaphragm spring you'll probably find it's all to pot, hence you have clutch drag, even with the pedal mashed into the carpet. I have found a lot of these "super clutches" are built around used cores, with re ground pressure plate castings. I only use brand new parts in the covers of my clutch, as it saves this sort of problem. There are ways around it, but the cost of implementing them will be more than buying another clutch that actually works properly. If you adjust the pedal pushrod to attempt a fix you may find the release bearing soon fails, as it is then under a permanent thrust, or the clutch starts to slip, as full load is lost off the diaphragm.

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Thanks Chris. The shop that sold me the bits is a specialist clutch shop. They're called South Bend clutches in Indiana, US and are quite well known in the Supra community in the US http://www.dxdracingclutches.com/home.html I was there when they made it up. They used a brand new Toyota pressure plate and made up a custom disc (Stage 3 OFE). A concern they had was warp on the flywheel and they said that it was right at the max of what they would resurface. The problem I have started right after I installed the clutch. South Bend said that it was probably a case of wearing it in and making some clutch pedal adjustments but that was a year ago now and it's not gone away. It's fine on the road, even spirited gear changes, just useless on the strip to get a really good 60' time and low quarter. Could a deep skim off the flywheel (say 100 thou) be causing my problem somehow? Thanks.

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