What kind of clutch fluid do I use for an 88 f150

if the reservoir isn't completely empty just refill it but find out why your fluid is low

CHECK THE CLUTCH FLUID IF IT IS ON A MAXIMUM OR MINIMUM LEVEL.IF NO FLUID CHECK WHETHER THE LEAK IS FROM MASTER OR SLAVE CLUTCH CYLINDER.

You have a hydarulic clutch, if this condition came on slowly you may just need an adjustment, some models have adjustments available down by the clutch pedal area. otherwise you could have a fluid leak or component failure. check to see if the clutch fluid resevoir is full, if not, fill it with the proper fluid and see if you can bleed the air out of the system. if it is full then you probably will need to replace the clutch master cylinder or slave cylinder.

Your truck has a hydraulic clutch, check to see fluid is full in the clutch master cylinder, and see if fluid is leaking at the line or the slave cylinder, line could have broke, or master/slave cylinder needs replaced.

sounds like the master cylinder reservoir is empty of fluid. re-fill with fluid and bleed all air out of system all the way to the slave cylinder,,, this will / should restore the system.
also,, check to make sure there is not fluid dripping from under the truck when you press in on the clutch pedal ( could be a leak or bad slave cylinder (?) ),, but I would say that the system just needs to be bled.

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Have you checked the clutch master cylinder? If it is low on fluid it means you may have a leak possibly at the slave cylinder. Add fluid if needed and see if it improves.

Could be clutch is worn. Check shift fork. Also the throw out bearing should be replaced.

Right above the line at the bellhousing.

Check under the dash to see if the bushing that connects the clutch pedal to the clutch master cylinder is wore out. They get wore and fall out.

The switch is located at the top of the clutch pedal assembly, above your feet. Its a little cramped, but its a simple dc two wire switch, you should be able to check it with a meter for power and to see if the switch does indeed need replacement. If thats the problem, when you see the new switch, you'll know it goes in, very easy. good luck

It dextron/mercon trans. fluid commonly used in automatic transmissions.