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Been gone a bit, interesting site overhaul…
Anyhow, friend of mine suddenly found herself unable to shift while the engine was running. Called me, got her to shift while off in a few positions, car would move with clutch depressed, got her to try again after verifying slave/master fluid levels, after cycling through a few gears, worked ok again, got it to my place and replaced her blackened DOT3 fluid(I assume it was never changed), topping and bleeding slave at it’s bleeder valve until it was all new fluid. Seems to be fine now relatively, but she is stating the clutch was replaced not but a few years ago, and the clutch doesn’t start to engage until nearly all the way up in it’s travel.
I obviously suspect the slave cylinder, but she could simply be burning out the clutch, in addition to shifting I noticed her carpeted mat hindering it’s travel by at least a quarter inch, so I just don’t have anything definitive to tell her. Other than keeping the mat out from underneath, and if it fails again to let me know, and hopefully someone nearby can push in the clutch to see if the slave cylinder is then doing it’s job..
Is there a set of logical steps to diagnose the issue other than tearing out the trans to look without the original issue being present anymore?
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see if this helps.
http://www.ericthecarguy.com/faq/solving-transmission-problems
Yeah, went through that already, not telling me anything new I’m afraid. No leaking fluid that I can find, and none under slave’s boot. At this point my only conclusion is the slave was failing, likely at least partially due to the old fluid. If I can’t find any other means besides tearing it apart to find out, then I’ll have to go with my original recommendation to her, to just replace the slave when she can.
I think there are 2 problems there and you are on track with that but if the clutch does not engage until it’s almost at the top leads me to believe the clutch disc is almost worn out.
Yeah, was afraid of that. I let her know that was likely if it’s now shifting properly, and just to give it a week and see if anything further crops up. If not it’s replace the cylinder when possible, then clutch later when possible. Preferrably both at the same time, as it’d likely save some time and money.
Honestly, it sounds like you’ve covered the bases. Given the clutch position and the recent replacement of the clutch, it could be her driving habits or perhaps they didn’t install the clutch correctly. You wouldn’t know that until you removed the transmission however. I would look to the clutch hydraulics as you suggest first. It’s much easier to deal with those than the entire transmission.
Keep us posted.
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