Torque Converter: Testing and Inspection

K41B CVT: TORQUE CONVERTER AND DRIVE PLATE: INSPECTION

1. INSPECT TORQUE CONVERTER

(a) Inspect the torque converter one-way clutch.

(1) Lightly rotate the stator by pushing the splines with a finger.





Text in Illustration





OK:

Stator rotates smoothly when turned clockwise and there is resistance when it is turned counterclockwise.

(b) Determine the condition of the torque converter.

(1) Replace the torque converter if it does not fulfill any of the standard conditions.

Standard conditions:

*During the stall test or when the shift lever is in N, no metallic sounds are emitted from the torque converter.

*The one-way clutch rotates smoothly when turned clockwise and does not rotate when turned counterclockwise.

*The amount of particulate in the fluid is not greater than the sample shown in the illustration.





Text in Illustration





HINT
The sample illustration shows approximately 0.025 liters (0.026 US qts, 0.022 Imp. qts) of fluid taken from a removed torque converter clutch.

(c) Replace the fluid in the torque converter.

(1) If the fluid is discolored and/or has a foul odor, stir the fluid in the torque converter thoroughly and drain the fluid with the torque converter facing upward.

(d) Check that the inside of the oil cooler is clean.

(1) When inspecting the torque converter and/or replacing fluid, drain the fluid with the oil cooler installation surface facing downward.

HINT
If there is a large amount of particulate in the fluid, clean the inside of the oil cooler by adding new fluid.

(2) If the fluid is cloudy or white, check the oil cooler.

(e) Check the torque converter installation bolts.

(1) All of the installation bolts must be the same length (+/- 0.5 mm (0.0197 in.)) and each must have a spring washer.

2. INSPECT DRIVE PLATE AND RING GEAR

(a) Visually check the drive plate and ring gear.

(1) Check the drive plate and ring gear for damage.

HINT
Replace the drive plate and ring gear if it is damaged.

(b) Inspect runout of drive plate and ring gear.

(1) Set up a dial indicator and measure the runout of the drive plate and ring gear at 6 places along the torque converter installation surface.





Text in Illustration





Maximum runout:

0.30 mm (0.0118 in.)

HINT
If the runout exceeds the maximum, replace the drive plate and ring gear.