So first off I'm not a mechanic and I don't know hardy anything about cars after having issues with my transmission in my 2000 neon ES all week I decided to bring it into a shop to see where it was leaking from.

They told me it was coming from the cooler lines and they needed replaced but that would be $200. So i decided why not just do it my self. It's two hoses and couldn't be that hard.

After putting the new hoses on I started it up and let it idle for a while to get the fluid going back through. Then i started running it through gears with the parking brake on. Whenever I put it into reverse it makes this horrible loud vacuum noise almost like you're putting your hand against a vacuum hose. Does anyone know what i may have done wrong?

Thanks

 

Welcome to the 2nd Gen Neon forum.

I see you don't have any replies yet, so I'll see if I can get things started.

Did you have this noise Before the line work?

EDIT: Did you remove & replace the lines one at a time, so as not to get them cross connected?

Have you topped the tranny fluid level up after the repair, if so, where is it reading on the tranny dipstick, with the vehicle level, at warm idle, after having shifted into All gears, including "R", ending in "P"???