What are some of the 2005 Lexus ls430 transmission problems?

One of the most commonly reported problems regarding the transmission in the 2005 Lexus LS430 is poor shift quality when driving at lower speeds. Most customers reported speeds were around 5 to 10 miles per hour. The transmission either shifts hard into another gear or shifts from one to another too early. Some mechanics have said the issue is in the transmission itself which has a replacement cost of several thousand dollars but others believe the issue can be fixed with either a replacement ECU or a software update. The estimated cost to replace the ECU is around $200 to $250 for labor and $1600 to $1800 for parts. Additional costs and repairs may sometimes be necessary.