Originally Posted by 5.0 Mustang Man

I personally have had nothing but problems with clutches. I had the biggest single that valair made when I first built my truck. It held everything I threw at it for about 1500 miles. Then started slipping. Took it out and it was destroyed. I expected that though with the setup I put together and a single disk. Put a SB 3600 in there. Took everything thrown at it for about 2000 miles. Then it started slipping in 3-5 gear. I broke a countershaft in 5 speed and when we pulled trans to fix we also pulled clutch. Material on disks is not horrible but several spots of missing material and the flywheel looks absolutely horrid. All cracked up. It is still currently in there and slips horribly. Now it has about 3000 miles on it. I know my truck does not make more that 650hp and Im pretty sure the 3600 is rated for 800. That in my opinion is junk. Maybe I got a lemon clutch? The valair single was abused way more than the SB and lasted almost as long. So a Valair single is as strong as a SX DD I guess. Trying to figure out what to do now.