Boolean doesn't become true

I have this script, and it makes a car go forward and backwards.
When i press w and it goes forward, and i release a car it checks a boolean called slowDown, and it works.

When i press s and it goes backward and release the key it does not check slowDownB
Can someone see what i did wrong?

#pragma strict

var spin = 3;
var topSpeed = 20;
var speed : float = 0.0;
var slowDown = false;
var topSpeedB = -10;
var slowDownB = false;
function Update () 
{
//This to the next comment will be the car going forward.
if(Input.GetButton("FORWARD"))
{

speed = speed+0.2;

transform.Translate(Vector3(0,0,speed)   * Time.deltaTime);

}
if (Input.GetButtonUp("FORWARD"))
{
slowDown = true;
}

if(speed > topSpeed)

  {
    speed = topSpeed; 
    
    
    }
  
    if(slowDown == true)  
     {
     speed = speed-0.2;
     transform.Translate(Vector3(0,0,speed)   * Time.deltaTime);
     
     if(speed < 0)
     {
     speed = 0;
     
     slowDown = false;
     }
     
       
         }
         
         //This will be the car going backwards.
         
         if(Input.GetButton("BACKWARD"))
         {
         speed = speed-0.2;
         
         transform.Translate(Vector3(0,0,speed)   * Time.deltaTime);
         }
         
         if (Input.GetButtonUp("BACKWARD"))
         {
           slowDownB = true;
         }
         
         
         if(speed < topSpeedB)
         {
         speed = topSpeedB;
         }
         
         if(slowDownB == true)
         {
         speed = speed+0.2;
         
         
          transform.Translate(Vector3(0,0,speed)   * Time.deltaTime);
          
          if(speed > 0)
          speed = 0;
          slowDownB = false;
          
          }
         
       
         

    }

Missing closing brace on line 75. Learn how to use the Debug.Log() statement. :wink:

Your speed should be less than 0 not greater

         if(slowDownB == true)
         {
                 speed = speed+0.2;
                transform.Translate(Vector3(0,0,speed)   * Time.deltaTime);
 
                if(speed < 0)
                {
                      speed = 0;
                      slowDownB = false;
                }
 
          }