240 L4-2127cc 2.1L SOHC Turbo B21FT FI (1982)
Drive/Propeller Shafts, Bearings and Joints: Testing and Inspection
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Vibrations and knocking noises are the most common complaints with propeller shafts and universal joints. Vibrations are often caused by wear,
poor lubrication and incorrect installation. A humming noise which increases with speed usually confirms a vibrating propeller shaft.
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Worn universal joints usually cause knocking at low speeds and also when the accelerator pedal is depressed and released.
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Cracked or damaged propeller shafts must not be repaired or realigned. New units must be installed instead.