My clutch master cylinder is causing my clutch to slip. It is a duralast clutch master cylinder.

There is zero free play within the pedal. I compared it to a buddies CMC and it seems like my rod is almost more pushed in. I’ve tried to adjust the rod to give it more free play but the rod won’t turn AT ALL. The clutch has 4K miles on it max. When I put in this CMC I made sure to give it plenty free play.

You can see the difference between the 2 CMC’s here.

 

You either have the wrong master cylinder (too long), or it's not attached to the firewall correctly.

 

An over-adjusted cmc pushrod will cause clutch slippage.

Find Soviets DIY for clutch adjustment and you’ll be set.

 

Measure the threaded rod to make sure it’s the same length. Also measure the clip that it threads into and attaches to pedal

 

not same cars in photos ?

 

Rod won't turn? Can you loosen the 12mm locknut?

Even when over adjusted, so rod has tension, you should still be able to turn rod.

Clutch slipping is not the worst of it. You're also putting constant load on your thrust washer. You can replace clutch if it now wears out sooner that it would otherwise. Thrust washer can take out your engine.