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1988 GMC C3500 Clutch

Tiny
VANDYMANSR
  • MEMBER
  • 1988 GMC C3500
  • 5.8L
  • V8
  • RWD
  • MANUAL
  • 56,000 MILES
I am having trouble finding any information on how to adjust the clutch on my 88 GMC C3500 dually. I've replaced the master cylinder, the slave cylinder, bled the system, and there is only one quarter of an inch of clutch fork travel. I am not sure what the problem is. The pedal pushes all the way to the floor with no pressure or resistance. Can You explain to me if there is an adjustment and if so how it is accomplished?
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Saturday, January 11th, 2014 AT 8:49 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There is no adjustment to the hydraulic clutch see if you have bled it correctly. Here is how
Fill reservoir with clean DOT 3 brake fluid. Disconnect slave cylinder from bellhousing, leaving line attached. Hold slave cylinder at a 45 degree angle with bleeder screw facing up.
Have an assistant depress clutch pedal while you open bleeder. Close bleeder and release pedal. Repeat sequence until all air is removed from system. Make sure master cylinder reservoir stays full during bleeding process.
Also you might check for a bent release arm or a bad clutch as well.
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Saturday, January 11th, 2014 AT 10:17 AM

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