Luxluc Posted February 4, 2012 Share Posted February 4, 2012 (edited) Good afternoon, I planned to go on the dyno with a friend's single turbo Supra in Luxembourg. 3 weeks ago, he had wheelspin on the rollers at 6000 rpm (recorded 664 bhp before it began to spin). Therefore, we planned to go back today and put my 115kg in the trunk, together with some more straps to keep it firm against the rollers. We took the car out of the garage, had it running in front of my mate's house for a couple of minutes. When we wanted to start, he couldn't put any gear. We waited a bit (with the car standing outside), and tried again. Same problem : we couldn't engage a gear. We cancelled our appointment with the dyno guy, and pushed the car back in the garage. Is it possible that the clutch didn't like the cold temps (-8°C)???? Thanks for your help Luc P.S. Car is running a GT42 turbo, stock cams, aftermarked intake, E85, unknown clutch. Edited February 7, 2013 by Luxluc (see edit history) Quote Link to comment Share on other sites More sharing options...
Attero Posted February 4, 2012 Share Posted February 4, 2012 I'm wandering if the temperature can be the cause of difficult gear changing aswell. Since it got freezing, I've found it harder to hit it into first gear. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted February 4, 2012 Author Share Posted February 4, 2012 Well, it's the first time I hear of such a problem. My Supra isn't driven during winter, so I can't really comment. I know that when the gearbox oil is cold, 1st and 2nd gear are less smother than when the oil is warm. Today though, it was impossible to get any gear engaged. When taking the car out of the garage, it was OK. But then, after around 10 minutes, impossible to hit a gear. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 4, 2012 Share Posted February 4, 2012 Considering Toyota would have tested it at over 120 Fahrenheit and in Arctic temps I very much doubt a piddling minus 8 would affect things. Did the pedal stay firm and feel as if was was compressing the clutch diaphragm spring, or flop to the floor? Excess free travel/ we need MUCH more info to diagnose. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted February 4, 2012 Author Share Posted February 4, 2012 The pedal was light for the 1st third of the way down. Then it became firmer for the rest of the pedal way- I had the impression that there was no release noise of the clutch. Normally, the clutch rattles slightly when released, as ceases when pushed. There didn't seem to be any difference though. Additional comment : the guy had problems engaging 5th and 6th during last summer. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 4, 2012 Share Posted February 4, 2012 Sounds like a hydraulic issue, I would either renew master and slave cylinders, or at least thoroughly strip, clean, pressurised air blow, and reassemble with new seal kits. Check for obvious mechanical problems first though, like loose slave cylinder, or maladjusted pedal push rod. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted February 5, 2012 Author Share Posted February 5, 2012 Thanks for the info Chris. An info I forgot to mention is that when the engine was shut, I tried to change the gears without the engine running. 1st-4th went fine; 5th, 6th and reverse didn't pass. Quote Link to comment Share on other sites More sharing options...
Hellstrom Posted February 5, 2012 Share Posted February 5, 2012 Thanks for the info Chris. An info I forgot to mention is that when the engine was shut, I tried to change the gears without the engine running. 1st-4th went fine; 5th, 6th and reverse didn't pass. Thats totally normal as the gears are beefy. Sounds like either the PP is burnt or hydralics like chris said. --- I am here: http://maps.google.com/maps?ll=57.729234,11.785991 Quote Link to comment Share on other sites More sharing options...
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