V6 engines may have four types of rear Crankshaft Seals. Most 1984 models have two-piece neoprene or rope-type seals, serviceable without removing the crankshaft. Some 1984 models have a one-piece neoprene seal requiring crankshaft removal. To identify the seal type on 1984 models, the
Oil Pan and rear main bearing cap must be removed. On 1985 and later models, an oval cast on the engine block indicates a one-piece seal, accessible by removing the flywheel/driveplate. Special tools are needed for 1984 models with rope-type seals, while both halves of the seal must be serviced for two-piece neoprene seals. For 1985 and later models with one-piece seals, the transmission and flywheel/driveplate are removed.