UNDERDRIVE Clutch: Inspection: Inspection

WARNING: This page is about a different variant/trim than selected.

INSPECT UNDERDRIVE PACK CLEARANCE

Install the underdrive clutch to the transaxle case.

Fig 1: Identifying Underdrive Clutch Component Pack Clearance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:
Be careful not to damage the oil seal rings.
Install a dial indicator as shown in the illustration.

Measure the underdrive clutch pack clearance while applying and releasing compressed air (392 kPa, 4.0 kgf/cm² , 57 psi).

Pack clearance

1.51 to 1.71 mm (0.0594 to 0.0673 in.)

If the pack clearance is not as specified, inspect the discs, plates, and flange.

HINT:

There are 5 different thicknesses of flanges available.

FLANGE THICKNESS: MM (IN.)

Mark	Thickness	Mark	Thickness
1	3.0 (0.118)	4	3.6 (0.141)
2	3.2 (0.126)	5	3.8 (0.150)
3	3.4 (0.134)	-	-

INSPECT NO. 1 UNDERDRIVE CLUTCH DISC
1. Check if the sliding surface of the disc, plate, and flange are worn or burnt. If necessary, replace them.
  
  Fig 2: Identifying Underdrive Clutch Disc No. 1 Component
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  - If the lining of the disc comes off or discolors, or if a part of the groove is worn, replace all discs.
  - Before installing new discs, immerse them in ATF for at least 15 minutes.
INSPECT UNDERDRIVE CLUTCH DRUM SUB-ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the underdrive clutch drum bushing.
  
  Fig 3: Identifying Inside Diameter Of Underdrive Clutch Drum Bushing Component
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard drum bushing
  
  37.06 to 37.08 mm (1.4591 to 1.4598 in.)
  
  Maximum drum bushing
  
  37.13 mm (1.4618 in.)
  
  If the inside diameter is greater than the maximum, replace the underdrive clutch drum.
INSPECT UNDERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY
1. Using vernier calipers, measure the free length of the spring together with the spring seat.
  
  Fig 4: Identifying Free Length Of Spring Component
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard free length
  
  17.14 mm (0.6748 in.)