Automatic Transaxle Unit: Inspection

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT AUTOMATIC TRANSAXLE OIL PANEL SUB-ASSEMBLY
1. Remove the magnets and use them to collect any steel chips. Examine the chips and particles in the pan and on the magnet to determine what type of wear has occurred in the transaxle.
  Steel (magnetic): bearing gear and plate wear Brass (non-magnetic): bush wear
  
  Fig 1: Checking Chips And Particles In Pan
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT INPUT SHAFT END PLAY
1. Using a dial indicator, measure the input shaft end play.
  Standard end play: 0.262 to 1.249 mm (0.0103 to 0.0492 in.)
  
  Fig 2: Measuring Input Shaft End Play
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT MULTIPLE DISC CLUTCH HUB
1. Using a caliper gauge, measure the inside diameter of the forward clutch hub bushing.
  Standard inside diameter: 23.025 to 23.045 mm (0.9065 to 0.9073 in.)
  
  Maximum inside diameter: 23.09 mm (0.9091 in.)
  NOTE:
  - When the diameter is over the maximum, replace the multiple disc clutch hub with a new one.
    
    Fig 3: Measuring Inside Diameter Of Forward Clutch Hub Bushing
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - Check the contact surface of the bush in the direct clutch shaft. If any scratch or discolor is identified, replace the direct clutch subassembly with a new one.
  If the inside diameter is greater then the maximum, replace the forward clutch hub.
INSPECT NO. 2 UNDERDRIVE CLUTCH DISC
1. Check to see if the sliding surface of the disc, plate and flange are worn or burnt.
  If necessary, replace them.
  NOTE:
  - If the lining of the disc is peeling off or discolored, or even if a part of the groove is defaced, replace all discs.
  - Before assembling new discs, soak them in ATF for at least 15 minutes.
    
    Fig 4: Inspecting No. 2 Underdrive Clutch Disc
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT UNDERDRIVE BRAKE RETURN SPRING SUB-ASSEMBLY
1. Using a vernier caliper, measure the free length of the spring together with the spring seat.
  Standard free length: 14.04 mm (0.5528 in.)
  
  Fig 5: Measuring Free Length Of Spring Together With Spring Seat
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT 2ND BRAKE CLUTCH DISC
1. Check to see if the sliding surface of the disc, plate and flange are worn or burnt.
  If necessary, replace them.
  NOTE:
  - If the lining of the disc is peeling off or discolored, or even if a part of the printed number is defaced, replace all discs.
  - Before assembling new discs, soak them in ATF for at least 15 minutes.
    
    Fig 6: Inspecting 2Nd Brake Clutch Disc
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT 1ST AND REVERSE BRAKE CLUTCH DISC
1. Check to see if the sliding surface of the disc, plate and flange are worn or burnt.
  If necessary, replace them.
  NOTE:
  - If the lining of the disc is peeling off or discolored, or even if a part of the groove is defaced, replace all discs.
  - Before assembling new discs, soak them in ATF for at least 15 minutes.
    
    Fig 7: Inspecting 1St And Reverse Brake Clutch Disc
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY
1. Using a vernier caliper, measure the free length of the spring together with the spring seat.
  Standard free length: 15.51 mm (0.6106 in.)
  
  Fig 8: Measuring Free Length Of Spring Together With Spring Seat
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT UNDERDRIVE 1-WAY CLUTCH ASSEMBLY
1. Install the underdrive clutch assembly to the 1-way clutch. Rotate the underdrive clutch assembly to check the rotating direction for the lock or free operation.
  
  Fig 9: Installing Underdrive Clutch Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002