To ensure reliability, purchase GM part # 404294 Seal,Propeller Shaft Pinion Flange Oil. It is sometimes referred to as Buick Differential Seal. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Buick Electra, Lesabre, Regal models.
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