Canada - A/T - Driveline Whine/Hum/Thump Noise On Deceleration

Bulletin
0653

Publication Date
2004-04-21

Market
Canada

Reference
AT-03-005

Model
RX330

Year Range
2004

Component
AT

Subject:
DRIVELINE WHINE/HUM OR THUMP NOISE DURING DECELERATION

This TSB makes available a revised oil cooler tube sub-assembly to address the following conditions:
1. Some subject vehicles may exhibit a noise described as a drone, groan or hum when decelerating from 80 kmph (50 mph) to lower speeds. This noise is most noticeable while the gear shift lever is in the 4th gear position.
2. Other subject vehicles may exhibit a thump or clunk noise on a downshift at approximately 48 kmph (30 mph) while decelerating. This noise is also heard when coasting at 88 kmph (55 mph) and lightly applying the accelerator.

APPLICABLE VEHICLES:
- 2004 model year RX 330 vehicles produced BEFORE the Production Change Effective shown below.







PRODUCTION CHANGE INFORMATION:







PARTS INFORMATION:







WARRANTY INFORMATION:

REPAIR PROCEDURE:







1. Remove the Oil Cooler Tube Sub-assembly
a) Remove the engine undercover shield.
b) Place a container to catch the ATF leakage.
c) Using pliers or other tools, remove the 4 hose clamps.
d) Remove the 4 hoses from the oil cooler tube sub-assembly.
e) Using a 10mm wrench, loosen the 2 bolts on the oil cooler tube sub-assembly and remove it from the crossmember.

2. Install the New Oil Cooler Tube Sub-assembly to the Front Crossmember







a) Install the oil cooler tube sub-assembly to the front crossmember with the 2 bolts specified.
Tightening torque: 7.0 Nm (71 kgf-cm, 62 in-lbf)







b) Install the hose to the oil cooler tube sub-assembly. Fully insert the hose to the stopper of the oil cooler tube sub-assembly. Refer to the Fig 3.
c) Install the engine undercover assembly.

CAUTION:
Ensure hoses are straight and no twist remains after installation.

d) Add the ATF (Type: T-IV).

3. On the vehicle inspection, check the ATF level and ensure there is no ATF leakage. Fluid temperature: 70° to 80°C (158° to 176°F)







a) Park the vehicle on a level surface and set the parking brake.
b) With the engine idling and the brake pedal depressed, shift the lever into all positions from the P to the L (S1) position, and return to the P position.
c) Take out the dipstick and wipe it clean.
d) Put it back all the way into the pipe.
e) Take it out and check that the fluid level is within the HOT position.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.