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SEAL-EXTENSION HOUSING REMOVAL 1. Raise vehicle. 2. Mark propeller shaft and axle yoke for alignment reference. 3. Disconnect and remove propeller shaft. 4. Remove old seal with a screw mounted in a slide hammer. INSTALLATION 1. Place seal in position on overdrive housing. 2. Drive seal into overdrive housing with Seal Installer 9037 (1) and Handle C-4171. 3. Carefully guide propeller shaft slip yoke into hous- ing and onto output shaft splines. Align marks FLUID AND FILTER DIAGNOSIS AND TESTING EFFECTS OF INCORRECT FLUID LEVEL A low fluid level allows the pump to take in air along with the fluid. Air in the fluid will cause fluid pressures to be CAUSES OF BURNT FLUID Burnt, discolored fluid is a result of overheating which has two primary causes. 1. A result of restricted fluid flow through the main and/or auxiliary cooler. This condition is usually the result of a faulty or improperly installed drainback valve, a damaged oil cooler, or severe restrictions in the coolers and lines 2. Heavy duty operation with a vehicle not properly equipped for this type of operation. Trailer towing or similar high load operation will overheat the transmission fluid if the vehicle is improperly equipped. Such vehicles should FLUID CONTAMINATION Transmission fluid contamination is generally a result of: • adding incorrect fluid • failure to clean dipstick and fill tube when checking level • engine coolant entering the fluid • internal failure that generates debris • overheat that generates sludge (fluid breakdown) • failure to replace contaminated converter after repair 21 - 1052 AUTOMATIC TRANSMISSION - 48RE - SERVICE INFORMATION DR/DH |