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INSTALLATION (1) Place seal in position on overdrive housing. Installer C-3995-A (Fig. 80). (3) Carefully guide propeller shaft slip yoke into housing and onto output shaft splines. Align marks FLUID AND FILTER DIAGNOSIS AND TESTING - EFFECTS OF A low fluid level allows the pump to take in air along with the fluid. Air in the fluid will cause fluid DIAGNOSIS AND TESTING - CAUSES OF 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 usu- (2) Heavy duty operation with a vehicle not prop- erly equipped for this type of operation. Trailer tow- fluid if the vehicle is improperly equipped. Such vehicles should have an auxiliary DIAGNOSIS AND TESTING - FLUID 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 break- down) • failure to reverse flush cooler and lines after repair • failure to replace contaminated converter after repair The use of non-recommended fluids can result in transmission failure. The usual results are erratic The dipstick cap and fill tube should be wiped clean before checking fluid level. Dirt, grease and Engine coolant in the transmission fluid is gener- ally caused by a cooler malfunction. The only remedy The transmission cooler and lines should be reverse flushed whenever a malfunction generates Failure to flush the cooler and lines will result in recontamination. Flushing applies to auxiliary cool- STANDARD PROCEDURE - FLUID LEVEL Low fluid level can cause a variety of conditions because it allows the pump to take in air along with Fig. 80 Installing Overdrive Housing Seal 1 - SPECIAL TOOL C-3995-A OR C-3972-A 21 - 144 AUTOMATIC TRANSMISSION - 42RE AN EXTENSION HOUSING SEAL (Continued) |