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hard shifting

1.3K views 5 replies 3 participants last post by  Bill Threlkel  
#1 ·
Hi,
I have an '86 F250 diesel with the four speed manual transmission (hydraulic clutch). I have a decently hard time shifting when cold, which is expected to a certain degree. But I have a very tough time getting into reverse, warm or cold. Anyone experienced this before? It's almost as if the clutch isn't disengaging completely. I checked for the obvious things, and all seems to be in working order. Is there a bleeder valve on the slave cylinder for the clutch that needs to be bled out?

Thanks

Jason
 
#2 ·
Have someone push the clutch pedal while you watch the clutch master cylinder, if it moves you have a cracked firewall. It is a common problem, let us know what you find and we can offer some help.

Welcome to the site.
 
#3 ·
Joe,

Thanks for the quick reply. Just went out and had my wife push on the clutch a few times. The master isn't moving at all from where its mounted on the wall. I also stuck my head under the body and saw the slave cylinder was moving the arm properly too. Any thing else I should be checking? Thanks again,


Jason
 
#4 ·
The shop manual says that the slave plunger should extend at least 0.53 inches when the pedal is pushed if the hydraulic system is working right.

I have seen 2 styles of slave cylinders, one has a standard bleeder valve on top of the slave. The other has a Allen screw in the front top corner of the slave, makes a real mess when the fluid shoots out. /ubbthreads/images/graemlins/grin.gif

Having the front of the truck higher helps in bleeding and compressing the slave rod into the cylinder by hand just before you close the bleeder also helps. Keep a close eye on the fluid level in the master as it drains fast.

The 1st time I bled mine I used over a quart of fluid, now it usually takes 2 tries. /ubbthreads/images/graemlins/smokin.gif
 
#6 ·
What I did to make my truck shift easy was to grease the throwout bearing shaft. To do this remove the slave cylinder{wire slave to keep it from coming a part} and then the shifting fork then clean shaft as well as you can not getting any thing on the throwout bearing. then put some grease on the shaft and move the throwout bearing bsck and forth untill it moves freely. Then reinstall the shifting fork then the slave cyclinder. This is what I found when reading the service manual but in fine print,not on maintance chart.
Bill