Toyota Sienna Quiz
U151e automatic transaxle

Inspection

In this manual: U151e automatic transaxle
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
~1min read

1. INSPECT UNDERDRIVE PACK CLEARANCE

INSPECT UNDERDRIVE PACK CLEARANCE

(a) Install the underdrive clutch to the transaxle case.

NOTICE: Be careful not to damage the oil seal rings.

(b) Install a dial indicator as shown in the illustration.

(c) 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 flanges in different thickness.

Flange thickness: mm (in.)

2. INSPECT UNDERDRIVE CLUTCH DISC NO.1

INSPECT UNDERDRIVE CLUTCH DISC NO.1

(a) Check if the sliding surface of the disc, plate and flange are worn or burnt. If necessary, replace them.

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.

3. INSPECT UNDERDRIVE CLUTCH DRUM SUBASSEMBLY

INSPECT UNDERDRIVE CLUTCH DRUM SUBASSEMBLY

(a) Using a dial indicator, measure the inside diameter of the underdrive clutch drum bushing.

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.

4. INSPECT UNDERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY

INSPECT UNDERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY

(a) Using a vernier calipers, measure the free length of the spring together with the spring seat.

Standard free length: 17.14 mm (0.6752 in.)

Test yourself

A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.