VEHICLE DESCRIPTION: PICKUP TRUCKS EQUIPPED WITH MANUAL TRANSMISSION, V10 ENGINES AND FOUR-WHEEL-DRIVE TRANSFER CASES. UNDER SUSTAINED MAXIMUM RATED VEHICLE LOAD, WHILE DRIVING UP A STEEP GRADE IN FOUR-WHEEL-DRIVE LOW RANGE IN HOT AMBIENT CONDITIONS, THE LOCAL EXHAUST TEMPERATURE PROXIMATE TO THE HYDRAULIC CLUTCH LINE CAN GENERATE LINE TEMPERATURES THAT EXCEED THE TEMPERATURE LIMIT OF THE CLUTCH LINE MATERIAL. IF THIS CONDITION OCCURS AND THE CLUTCH IS DEPRESSED, THE LINE COULD RUPTURE.