8HP70 Automatic Transmission Oil Leak 15-16MY (SSM72901)

8HP70 AUTOMATIC TRANSMISSION OIL LEAK 15-16MY

TECHNICAL SERVICE BULLETIN

ISSUE

Oil leaking between the automatic transmission and transfer case which is currently being misdiagnosed leading to repeat repairs, i.e. leaks incorrectly being identified as coming from the rear transmission oil seal or sump.

Oil weeps through the aluminium of the casing in the base of the pocket around where the steel D clutch tube is embedded, refer to attached file.

CAUSE

Internal porosity in the area of the extension casing allows oil to reach the end of the small pocket under the tube where it is prone to casting skin damage during casting. Oil then drips from the drain hole in the space between the transmission and transfer box.

ACTION

Remove the transfer case and inspect the area as shown in the attached file. If a leak is confirmed in this area, submit a FRED for an automatic transmission replacement attaching clear photos confirming the issue.

Affected Vin Range 

(LG) Range Rover - 197043 - 279179 

(LW) Range Rover Sport - 504511 - 577765 

(LW) Range Rover Sport - 601763 - 648339 

(LA) Discovery 4/LR4 - 731301 - 812783 

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1 = Poor - Basic information provided - The SSM does not help me resolve the customer concern.