David Wilkinson Posted September 21, 2016 Share Posted September 21, 2016 I've just fitted an exedy standard blue box clutch to my WRX and have noticed that in 1st or reverse it judders quite bad when the throttle is feathered. It is fine if you put a bit more throttle on, but is this normal? Thanks for your help. Quote Link to comment Share on other sites More sharing options...
Sandals Posted September 21, 2016 Share Posted September 21, 2016 It will need time to bed in... give it a few hundred miles and see how it is Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted September 21, 2016 Share Posted September 21, 2016 Judder can be caused by ridges in the flywheel that are worn in by the old clutch plates rivits or oil contamination, did you check the flywheel for flatness before bolting the new clutch on ? 1 Quote Link to comment Share on other sites More sharing options...
David Wilkinson Posted September 21, 2016 Author Share Posted September 21, 2016 I will double check with the mechanic. He did have to change the oil seal on the flywheel. Would you feel a judder in all gears if it was the flywheel? Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted September 21, 2016 Share Posted September 21, 2016 Generally it's only really noticeable on pull away if it's to do with flywheel surface flatness . As sandy said it can dissappear after a while once it beds in to the flywheel surface (if the ridges weren't exessive) I've only ever fitted 4 clutches , 1 with a new lightweight exedy flywheel and the other 3 with old oe flywheels. I never had any judder but I had the old ones I fitted skimmed ,cos they had visual "ridges" in them . Quote Link to comment Share on other sites More sharing options...
David Wilkinson Posted September 21, 2016 Author Share Posted September 21, 2016 OK thanks for the help. Will it damage the new clutch in any way? Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted September 21, 2016 Share Posted September 21, 2016 If it's just a case of bedding into the slight ridges , once the plate face has worn into the same shape as the flywheel, it will be making full contact and hopefully not judder . Quote Link to comment Share on other sites More sharing options...
David Wilkinson Posted September 21, 2016 Author Share Posted September 21, 2016 Great, thanks mate Quote Link to comment Share on other sites More sharing options...
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