I have a question about the clutch in my 91 truck. How much do I need to do to my 2WD Toyota reg cab pick-up? The clutch slips in 4th and 5th if I get on it hard after the clutch is engaged. I adjusted the clutch in the cab near the pedal and this helped reduce the slipping. I bled the clutch on 3 different occasions with new fluid. A week after each bleed the fluid is dirty again. I'm thinking it needs a new clutch, but why is the fluid dirty? Do I need to replace the clutch master cylinder and slave cylinder as well? If I do the clutch this fall I think the flywheel needs to be resurfaced and maybe a new rear main seal put in on the engine. Any advice is appreciated.