So I've got a Cherokee with the 9 inch drum brakes in the back, I need a new cylinder and both times I've gone to autozone now they have given me a part that does not fit, what part do I need and where do I get it?

 

Tell the counter monkeys what you are working on, year make and model and what size brakes you have. Odds are they pulled the 10" versions. Measure the inside to make sure on size.

 

Take the old part with you, buy 2, replace both sides.

 

Yep. Do them both.

 

Yeah, they gave me a 10inch one first and then what they said was a 9 inch one. I finally gave up and went across the street to O'Riley's. Got the right part in 5 and was out the door in 5 minutes. Safe to say I'll never be using autozone again!