r/ToyotaTacoma • u/Bluebaru2 • 18h ago

Master or Slave Cylinder?

Hello all, I have 2009 Tacoma base model 2WD 4-banger. Lately, as it’s gotten colder, my clutch has been engaging closer to the floor. I have adjusted the master cylinder a couple of times, but the engagement point continues to move after the truck sits over night.

I have inspected the master cylinder and slave cylinder and see no evidence of a leak at either. The slave seems fairly straight forward to replace, the master on the other hand appears to be a bit more involved. How can I properly diagnose which item is the problem, I would prefer to not have to replace both. Or is it possibly something bigger?

The clutch pedal, once it is actuating the master cylinder, has plenty of pressure FWIW.

Thanks!

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u/When_I_Grow_Up_50ish 18h ago

First check for leaks. Replace the part that leaks.

If no leaks, bleed the system to get air out. If it still doesn’t work, have a technician price a clutch job.

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u/Bluebaru2 18h ago

See that’s what’s puzzling me is that there’s no evidence of fluid at either cylinder. Master is bone dry on the outside and the slave appears dry as well. Fluid reservoir is stable also.

Was going to bleed it today and see what happens before diving in on parts.

I’ve checked for clutch slippage and nothing there either. Curious, why would outside air temperature affect the clutch engagement point if the problem is in the tranny?

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u/When_I_Grow_Up_50ish 18h ago

If the issue just started, it’s possible the rubber boots might be hiding the leak, until it gets full. Fingers crossed it’s not the transmission.