Measurement Of Transmission Fluid Levels (44/01/98/NAS)

Publication date: 1998-03-06
Reference number: 44/01/98/NAS

MEASUREMENT OF TRANSMISSION FLUID LEVELS

TECHNICAL SERVICE BULLETIN

Reference Number(s): 44/01/98/NAS, Date of Issue: March 6, 1998

LAND ROVER:	Defender (LD); Discovery (LJ); Range Rover Classic (LH); Range Rover (LP)
ISSUE:	1
SECTION:	Gearbox
AFFECTED VEHICLES:	Defender (LD); Discovery (LJ); Range Rover Classic (LH); Range Rover (LP) - ALL AUTOMATIC EQUIPPED

SITUATION

REQUIREMENT TO CHECK FLUID LEVELS IN HOT AUTOMATIC TRANSMISSIONS

In the shop environment, particularly when vehicles are undergoing routine service, it is not always possible to check the automatic transmission fluid levels at the optimum "cold" condition.

RESOLUTION

ALTERNATIVE HOT CONDITION MEASURING METHOD

When "cold" measurement of automatic transmission fluids is not possible and an accurate indicator of fluid level is required, utilize the alternative measuring method outlined below. For a HOT transmission the MAXIMUM oil level indication is 19 mm (0.750 in.) above the MAXIMUM COLD indictor on the dipstick.

PARTS INFORMATION

No parts are required.

WARRANTY CLAIMS

Information only

REPAIR PROCEDURE

CAUTION: The HOT measurement level specified in this TIB is the MAXIMUM level allowable with a fully hot engine/gearbox.

Always check the transmission fluid level under either fully HOT conditions or fully COLD conditions.
DO NOT OVERFILL

AUTOMATIC TRANSMISSION FLUID LEVEL MEASUREMENT PROCEDURE

Position the vehicle on a level surface with the parking brake applied and the transmission in Park.
Apply the foot brake and start the engine.
WARNING: Ensure that the foot brake is firmly applied during the following procedure.

NOTE: Pause briefly (two to three seconds) in each gear position.
With the foot brake still applied, move the shift lever slowly through each gear position starting from Park. (P, R, N, D, 3, 2, 1).
Return the shift level to Neutral (N) and leave the engine running.
Remove the transmission dipstick and wipe clean.
Insert the clean dipstick into the gearbox and ensure that it is pushed in completely.
CAUTION: If the engine is HOT the MAXIMUM oil level is at 19mm (0.750 in.) above the upper maximum cold indicator hole/marking in the dipstick. This location indicates the MAXIMUM HOT transmission oil level.
Remove the dipstick immediately and observe the fluid level (Fig 1 ).
- If the engine is HOT, fill transmission fluid to a level 19mm (0.750 in.) above the MAXIMUM cold marking.
- If the engine is COLD, fill transmission fluid to the MAXIMUM cold marking.

Fig 1: Fluid Fill Levels