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My sons 1993 f250 4wd with 460 CID , rpm rises and speed decreases could it be the slave cyl , master , pressure plate ...???

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In this case, it can only be one, or all of the things that you mentioned. What you will want to take into consideration is how the vehicle is driven/use of the clutch, and how long/many miles since the components (clutch, pressure plate, slave cylinder and throw out bearing) have been replaced, as well as the last time that the flywheel was resurfaced. Either way, if you have to drop the tranny, you might as well just replace all of the components.
I hope that you have found this information to be useful, and if I can be of any further assistance, please let me know. Thank you for using fixya!

Posted on Aug 01, 2013

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Posted on Jan 02, 2017

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SOURCE: Removal of slave clutch master cylinder

The hydraulic cylinder is in the bell housing. When you separate the motor and tranny, you will see it as a unit with the throw-out bearing. Take the hydraulic line off before you start. You will have to bleed it when you are done.

Posted on Aug 13, 2008

  • 2 Answers

SOURCE: clutch has no pressure and i have replaced everything i know of.

did u try bleeding the lines ? if your changed every thing and still have nothing u might just have alot of air in the system

Posted on Dec 16, 2008

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SOURCE: 1990 wrangler all new slave cylinder, pressure

If you have had the flywheel cut, have a clutch with a different release height (different finger or diaphram design & height) or a remanufactured pressure plate, or all of the above, you may run into this problem.
Small differences there translate to a large difference at the pedal. On linkage type designs, there were several options including longer/shorter throwout bearing or adjustable fork pivot ball. Hydraulic systems should compensate somewhat, but if you are beyond the travel of the slave cyl, I'm not sure there is anything you can do from the outside. I would check that there are no air leaks. If you have an external slave cylinder you may be able to make a slightly longer rod that connects the slave to the clutch fork. I really can't think of anything else to do at this point.
Hope this helps a bit.

Posted on Apr 19, 2009

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Please Rate this !

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