ATSG

  • Shortly after a fluid and sump filter change, whether part of a service or overhaul, the transmission begins to exhibit delayed engagements or a no move condition.
  • A June POWERTRAIN PRO Newsletter entitled “Adding up Pump and Input Shaft Usage” covered parts transitions that took place with the 4L60-E transmission when an Input Shaft Speed Sensor was added.
  • Back in the day when transmissions had governors, it was easy to diagnose a wrong gear start problems. There was either a governor regulation issue or a stuck shift valve.
  • Owners of 2011 to 2012 Dodge and Jeep vehicles equipped with an RFE transmission might complain of a harsh/audible shift from Drive to Neutral predominately with elevated ambient and transmission and driveline temperatures.
  • Do you shy away from customers that come to you with a transmission complaint? Today, nearly everything on the car is electronically controlled, and the transmission is no exception.
  • This little piece of history becomes interesting when we consider the similarities seen with transmissions being used in Mitsubishi, Hyundai and Kia vehicles. 
  • Rather than a gear and crescent type of pump, General Motors uses a vein type pump (figure 1 – 4L60-E Pump) in many of their transmissions. 
  • GM vehicles equipped with the 6L80/90 transmission, built prior to December of 2008 may exhibit a complaint of a flared 2-3 up-shift.