noise in auto transmission

• bmwf1kin

  26 Dec 04, 10:42

  Hi there
  
  Sometimes when my friend's toyota vios was packed with 4 passengers and engage reverse from parking. There is a knocking sound and jurking from his car.
  Can someone explain why is this happening or is there something wrong with the auto transmission?
  
  Thanks a lot
• Ah Wei

  26 Dec 04, 17:12

  Frankly speaking, it really sounds like there's a problem with the AT. If its still under warranty, get BM to check and replace one!
  
  Btw, how old is his Vios and what's his mileage like? Another possibility could be the ATF (auto trans fluid). Maybe its time to replace that.