how do i know which slave cylinder i need for my truck. it is a 1989 f250 351w 4x4 with a 5 speed. o'reilly's calls for this one http://www.oreillyauto.com/site/c/de...1352&ppt=C0015
and autozone calls for this one i think http://www.autozone.com/autozone/cat...&parentId=12-0
so how do i know what i need?

 

your link to O'rielly's doesn't seem to be working ..

look under your truck from the drivers side .. at the bell housing .. if you see a hyd cylinder that pushes on a fork you need an external .. if you see a hose entering the bell housing, you need internal ..

 

i know its the internal style for sure. just didnt know which one to get cause they look a little different than each other. and fixed the link

 

AutoZone.com | | Clutch Slave Cylinder | CLUTCH SLAVE CYLINDER This is the type you would need for a 5 speed.
Didn`t see your other post. Some manufacturers just supply the slave cylinder, some supply it along with the throwout bearing so they can look slightly different. Get a good make as you will not want to do it twice.

 

If you get either one of those, you will be back on this forum in six months or a year complaining that you just replaced your slave cylinder and now it's leaking again. You will probably ask for a good brand that won't leak and will last as long as the original did. So let me save you some time: go to the dealer and get a motorcraft slave cylinder. You will be glad you did when you don't have to pull the tranny to replace it again.

 

if it's internal and was leaking you probably contaminated the clutch with hyd fluid .. give it a good look over, or just replace it too, while your in there ..