ATSG

  • 2003-2011 Ford Ranger and 2003-2010 Mazda B-2300 with the 2.3L 4 cylinder interference designed engines and 4R44/5R55 series transmission may incur engine damage after transmission R&R.
  • On occasions, solenoids that appear to be similar may be mistaken as identical. Toyota’s U150 series transmission is a good example of this.
  • Through many years of experience diagnosing transmission concerns in shops and on ATSG’s technical help line, a general diagnostic approach has been developed to find that silver bullet as quickly as possible. The list begins with Information. 
  • It is not unusual for a 2000-2004 Honda or Acura vehicle using a 5 speed 3 shaft style automatic transmission to come in to the shop with the third clutches destroyed. Many times rotational damage of the piston, return spring and spring retainer accompanies the third clutch burn out.
  • The March 2015 article called “The Seven Sisters” made reference to this weekly newsletter. Subaru vehicles using the 4EAT Phase 2 Version 2 transmission experience wheel hop during tight corner turning maneuvers due to a failed Transfer Clutch Solenoid.
  • With the cold weather hitting many areas of the country nearing an end, spring time fever outweighs a cold headache anytime. Some things are designed to work well in the cold and some are not, especially when they get old.
  • Transfer clutch burn out is not uncommon with Subaru transmissions. Normal wear and tear, sealing ring failure or molded piston failure (especially with glycol intrusion) would be a few items on the list. 
  • Today, Subaru has committed its entire vehicle line to a CVT transmission called the Subaru Lineartronic CVT.