A/T - Special Oil Requirements

Group 24
Automatic Transmission

Bulletin Number
24 11 92 (3666)

Woodcliff Lake, NJ
November 1993
Product Engineering

This Service Information bulletin supersedes S.I. 24 11 92 (3666) dated October 1992.

Please remove and discard S.I. 24 11 92 (3666) dated October 1992 from your S.I. binder.

SUBJECT:
A5S 560Z Oil Requirements

MODELS:
540iA, 740iA/iL

Situation:

The A5S 560Z automatic transmission used in the above models is filled at the factory with a new semi-synthetic ATF. The new oil, Shell LA 2634, is capable of a lifetime service interval and no subsequent oil changes are necessary on this transmission. Refer to Technical Reference Information bulletin 24 01 92 (2127) for additional information on this oil.

Action:

Shell LA 2634 is currently the only oil approved for use in this transmission. Mixing this oil with other grades of ATF will cause the automatic transmission to malfunction and is not permitted.

Fluid level checking procedure

The oil level in replacement transmissions is correct and need not be checked, nor is it necessary to check the oil level during the Quality Certification services (QC I and QC II).

In the event of a complaint, checking the oil level may be useful if there is evidence of leakage or if it is suspected that work has already been undertaken on the transmission.

The following procedure supersedes any previously published procedure on oil level checking for the A5S 560Z and must be followed carefully to ensure a proper oil level.

1. The vehicle must be without load and standing on a flat, level surface.

With the engine running switch on the low-beam headlights or the air conditioning. This will increase the idling speed and ensure that the transmission's oil pump supplies a sufficient volume of oil to reliably maintain all oil passages filled with oil.

2. The transmission temperature must be between 20~C and 30~C before beginning the checking procedure. Use the Service Tester or MoDiC to determine the transmission oil temperature.

3. Step on brake firmly, apply parking brake fully and move the gear selector lever several times in succession through each gear position, pausing briefly in each gear.

4. With the engine running and the selector lever in PARK or NEUTRAL position, remove the filler plug located in the bottom of the oil sump. Note that some oil will always be trapped above the plug and run out when the plug is removed: this is not an indication of proper filling or overfilling.

5. Add the specified oil until it starts to overflow.

6. With the engine running, reinstall oil filler plug (tightening torque = 100 N-m).

SPECIAL NOTES ON OIL LEVEL CHECKING

It is preferred to begin checking with an oil temperature of 20~C and be prepared to reinstall the oil filler plug at 30~C. The transmission will hold an extra 0.6 liter of oil this way versus topping up at 50~C.

If the oil temperature rises above 50~C during the checking procedure, the resulting oil level will be too low.

If there is a suction sound during the fill-up procedure air is being sucked in at the oil pick-up. This must be avoided as it will cause oil foaming resulting in a reduced oil level. If oil foaming is suspected, shut-off the vehicle and repeat the fill-up procedure after waiting a few hours for the oil to settle down.

Adding oil (ATE) after repair

1. With the engine stopped, add oil to the transmission until it overflows.

2. Insert and tighten the filler screw, select PARK position and start the engine.

3. Remove oil filler plug and add oil until it overflows.

4. Check the oil level as detailed above.