Hey guys i was drivin it earlier today and i was about to go into 2nd gear and the clutch wouldn't disengage it did outta first but not lettin me go into 2nd. my friend had this problem with his nissan and it was the master cylinder (i believe). all he did was bleed the lines and replace the cylinder. i'm assuming its either that or the slave cylinder. it feels like it takes no effort to depress the clutch now like i could press it down with my pinky basically. has this happened to anyone else? what could i do?

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1991 Ford Ranger 4 cyl 2.3l 5 speed