ATR/ATM Unit Repair — Overdrive Planetary Gear and Overdrive Direct Clutch Inspection, page 194

AT-48

A340E(Others) AUTOMATIC TRANSMISSION - OVERDRIVE DIRECT CLUTCH

AT05D-06

OVERDRIVE PLANETARY GEAR AND
OVERDRIVE DIRECT CLUTCH INSPECTION

1. INSPECT DISC, PLATE AND FLANGE
Check to see 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 is peeling off or discolored, or
  even if a part of the printed numbers are defaced, re-
  place discs.
★ Before assembling new discs, soak them in ATF for
  at least 15 minutes.

Printed
Number

AT6455

2. CHECK OVERDRIVE DIRECT CLUTCH PISTON
(a) Check that the check ball is free by shaking the piston.
(b) Check that the valve does not leak by applying low-pres-
  sure compressed air.

AT8150

3. CHECK OVERDRIVE DIRECT CLUTCH DRUM BUSH-
INGS
Using a dial indicator, measure the inside diameter of the
clutch drum bushings.
Maximum inside diameter:
  27.11 mm (1.0673 in.)
If the inside diameter is greater than the maximum, re-
place the clutch drum.

AT8035

4. CHECK OVERDRIVE PLANETARY GEAR BUSHING
Using a dial indicator, measure the inside diameter of the
planetary gear bushing.
Maximum inside diameter:
  11.27 mm (0.4437 in.)
If the inside diameter is greater than the maximum, re-
place the planetary gear.

AT8143