1985 Toyota Pickup clutch

Tiny
GARY.GUTHRIE
  • MEMBER
  • 1985 TOYOTA PICKUP
  • 4 CYL
  • 4WD
  • MANUAL
  • 68,000 MILES
I have a new clutch, clutch master cylinder, and clutch slave cylinder in the truck. When I first drive it everything works great. The longer I drive it, it begins to slip, motor rpm's get higher but it doesn't go, but I can stop and bleed the clutch and it works great again. I thought it may be getting air somewhere but I don't know what else to do. Thanks for your help.
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Monday, November 10th, 2008 AT 8:44 PM

7 Replies

Tiny
MASTERTECHTIM
  • MEMBER
Sounds like the throw on the master cylinder is lot releasing all the way causing pressure on the slave cylinder and not releasing it thus the clutch is actually being applied. Recheck master mounting. If the problem started after clutch master replacement and it is installed correctly then the master is probably defective
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Monday, November 10th, 2008 AT 8:47 PM
Tiny
GARY.GUTHRIE
  • MEMBER
Dont know what the throw is? Is this somehting I can check or or $15 should I just try another master c
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Monday, November 10th, 2008 AT 8:55 PM
Tiny
MASTERTECHTIM
  • MEMBER
By throw I mean the rod that connects from the clutch pedal to the master cylinder. If the rod does not fully release then the fluid will not return to the master cylinder reservoir causing pressure to be applied to the clutch slave cylinder thus applying the clutch.
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Monday, November 10th, 2008 AT 9:03 PM
Tiny
MASTERTECHTIM
  • MEMBER
That is why when you bleed the system what your actually doing is relieving the pressure on the slave cylinder.
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Monday, November 10th, 2008 AT 9:05 PM
Tiny
GARY.GUTHRIE
  • MEMBER
Thanx tim I will buy another master cylinder they are fairly inexpensive and hopefully that will fix this problem that is driving me crazy. Thanx again I appreciate your time
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Monday, November 10th, 2008 AT 9:08 PM
Tiny
MASTERTECHTIM
  • MEMBER
Make sure there is some free play on the clutch pedal after installing new one. You should be able to pull up on the pedal and have a little slack or slop in the pedal thus applying no pressure to the master. If the pedal has no play then that is the issue we will need to fix. **I remember some of these has a 1/4 inch spacer behind the master cylinder that was made out of plastic and if that is not there then that would be the reason for the pressure on the pedal. It might not have had the plastic spacer but if its there make sure it stays there.
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Monday, November 10th, 2008 AT 9:15 PM
Tiny
GARY.GUTHRIE
  • MEMBER
Ok thanks alot. U have been more than helpful
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Monday, November 10th, 2008 AT 9:18 PM

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