Canada - A/T - A/T Fluid Information

Bulletin
TSB0635R

Issue Date
November 12, 2003

Market
Canada

Title
INTRODUCTION OF NEW AUTOMATIC TRANSMISSION FLUID

Component
AUTOMATIC TRANSMISSION & TRANSAXLE

Models
'04 - '05 GX 470, LS 430 & LX 470

TSB REVISION NOTICE:
- December 20, 2004: TSB content has been expanded; 2005 model year added to Applicable Vehicles.
The previous TSB should be discarded.

INTRODUCTION:
The new automatic transmission fluid (ATF) "WS" has been introduced on the 2004 - 2005 model year GX 470, LS 430 and LX 470 vehicles. The following will provide information regarding service precautions and identification methods for vehicles which use ATF "WS."

NOTE:
ATF "WS" is NOT compatible with any other type of transmission fluid.

APPLICABLE VEHICLES:
- 2004 - 2005 model year GX 470, LS 430 and LX 470 vehicles.







PARTS INFORMATION:







WARRANTY INFORMATION:

IDENTIFICATION PROCEDURE:
The following symptoms will occur if non-WS ATF is put into a WS compatible automatic transmission:
- Non-WS ATF has a higher viscosity. Because of this, response to changes in fluid pressure decreases, lengthening shift time, causing shift flare.
- When the fluid temperature is low, (approximately -40°F (-40°C), air can enter the oil pump causing cavitation resulting in low fluid pressure.
- Fuel consumption increases.

The following symptoms will occur if ATF WS is put into a non-WS compatible automatic transmission:
- ATF WS has a lower viscosity than other ATFs. Because of this, response to changes in fluid pressure increases, shortening shift time, causing shift shock.
- If WS is filled into a non-WS automatic transmission, the fluid could leak out under high temperatures (approximately 284°F (140°C).

Vehicles that use ATF WS can be identified by:
a) The ATF dipstick, or level gauge is no longer installed.
b) "WS" is stamped on the refill plug.

Fluid level inspection:
Check the fluid level by inspecting for leakage. If there are no leaks present at time of inspection, the fluid level is correct.

For details about the ATF WS filling procedures, refer to the ETAS for applicable model year GX 40, LS 430 or LX 470 Repair Manual:

Section: Automatic Transmission / Trans;
Sub-section: Automatic Transmission Fluid (A750E/A750F).