A/T - ATF+4 Fluid Usage

NUMBER: 21-021-05

GROUP: Transmission

DATE: October 20, 2005

THIS BULLETIN SUPERSEDES SERVICE BULLETIN 21-003-02, DATED JULY 29, 2002, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE ADDITIONAL MODEL YEARS, REVISED DISCUSSION AND REVISED PARTS REQUIRED SECTION.

SUBJECT:
ATF+4 Usage

OVERVIEW:
This bulletin provides information about ATF+4 usage in ST22 models.

MODELS:

2001 - **2005** (ST) Sebring/Stratus Coupe

DISCUSSION:

ATF+4 (type 9602) is approved for use in Sebring/Stratus Coupe power steering and automatic transaxles. The fluid is fully compatible in power steering systems and no additional maintenance information is required. When using ATF+4 in automatic transaxles, the following information is required for proper service and maintenance.

SCHEDULED MAINTENANCE

When using ATF+4 as a complete fill in Sebring/Stratus Coupe models, the maintenance for schedule A is changed to a 60,000 mile fluid replacement interval. Schedule B remains the same as listed in the owners manual. The owner should be notified about this schedule change when ATF+4 is used as a complete fill.

NOTE:
Using ATF+4 for top off will not change the original characteristics of the factory fill or original maintenance schedule.

GENERAL SERVICE FILL

ATF+4 is fully compatible for top off or for any transaxle service procedures that would require fluid fill or fluid replacement. Special considerations are required if a new torque converter is installed.

TORQUE CONVERTER REPLACEMENT

If a new torque converter is installed, ATF+4 can be used however, green torque converter shudder MAY be experienced. If green torque converter shudder is experienced, it will be eliminated over time as the torque converter clutches wear or burnish in. If shudder occurs, the vehicle can be driven (in torque converter partial lockup) until the condition is eliminated. **The table below lists the speeds to drive the vehicle to achieve torque converter partial lock up. If customer concerns arise due to green torque converter shudder and will not accept the normal burnishing procedure, use the following procedure.**

NOTE:
**To eliminate any concerns of green torque converter shudder, the transaxle can be filled with Diamond SPIII fluid during the initial fill**.

1. Drain and refill the transaxle with a minimum of 80% Diamond SPIII Transmission Fluid.

NOTE:
**Diamond SPIll fluid is available from Mitsubishi dealers.**

2. Warm the transaxle (by driving) to a minimum of 40° C (104° F).





3. Drive the vehicle for 50 kilometers (30 miles) in a speed range to keep the transaxle torque converter in partial lock up.





PARTS REQUIRED:

POLICY:
Information Only

Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.