inside the transmission theres something that pushes the fluid to move gears right ,whats it called.my other beater car is going through tranny problems and when its cold it drives fine but when it warms up it gets messed up,going 20mph with rpms higher than normal,the mechanic told me it was a part gone bad but i couldnt understand him cuz his english isnt that good.

 

Valve body.

 

yup!

 

is that expensive to fix ,how much is this pos car gonna run me

 

I'm not sure of replacment costs but you could search for "Don's VB mod" here on the org. Many people have done this mod and is quite appreciated!