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Buick 404294 Seal,Propeller Shaft Pinion Flange Oil

1982-1990 Buick

Customer Questions & Expert Answers (2)
404294 GM Seal,Propeller Shaft Pinion Flange Oil Illustration 1 of 1
  • Part Description
    Seal,Propeller Shaft Pinion Flange Oil
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Buick
    Manufacturer Part Number404294
    Part DescriptionSeal,Propeller Shaft Pinion Flange Oil
    Other NamesPinion Seal
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU404294
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1982-1984 Buick Electra6 Cyl 4.1L, 8 Cyl 5.0L, 8 Cyl 5.7L Diesel2 DOOR, 4 DOOR, COUPE 2 DOOR, ELECTRA ESTATE WAGON, LIMITED 2 DOOR, LIMITED 2 DOOR RWD, LIMITED 4 DOOR, LIMITED 4 DOOR RWD, SEDAN 4 DOOR
    1982-1989 Buick Estate Wagon6 Cyl 3.8L, 6 Cyl 4.1L, 8 Cyl 5.0L, 8 Cyl 5.7L DieselCUSTOM 2 DOOR, CUSTOM 4 DOOR, ELECTRA ESTATE WAGON, ESTATE WAGON, LIMITED 2 DOOR, LIMITED 2 DOOR COLLECT SP EDIT, LIMITED 4 DOOR, LIMITED 4 DOOR COLLECT SP EDIT
    1988-1990, 1982-1985 Buick Lesabre6 Cyl 3.8L, 6 Cyl 4.1L, 8 Cyl 5.0L, 8 Cyl 5.7L DieselCUSTOM 2 DOOR, CUSTOM 4 DOOR, ELECTRA ESTATE WAGON, ESTATE WAGON, LIMITED 2 DOOR, LIMITED 2 DOOR COLLECT SP EDIT, LIMITED 4 DOOR, LIMITED 4 DOOR COLLECT SP EDIT
    1982-1987 Buick Regal6 Cyl 3.8L, 6 Cyl 4.1L, 6 Cyl 4.3L Diesel, 8 Cyl 5.0L, 8 Cyl 5.7L Diesel2 DOOR, 4 DOOR, REGAL, STATION WAGON
  • Customer Questions & Expert Answers

    Q:
    Does this part fit my car?
    A:
    You can Select Your Vehicle to check if 404294 fits your vehicle.
    Posted and answered by GM Parts Specialist Matt
    Q:
    How to remove and install Differential Seal on Buick Regal? Posted by Yali W.
    A:
    To remove or install the pinion companion flange, align the driveshaft and the pinion companion flange before assembly in order to avoid mishits. Remove the driveshaft from the pinion companion flange by slackening the nuts securing it, hoist the propeller shaft on the body tunnel and fix it to the exhaust pipe by joining the wires. If the above joint bearing caps do not come with a retainer strap then the same should be fastened with the help of a tape. Subsequently, note the alignment of position of the companion flange, pinion shaft and nut such that when assembling it, it will achieve the correct pinion bearing preload. To remove the companion flange nut and washer, engage Tool J-8614-10 or an equivalent tool to hold the pinion companion flange. Put an appropriate tray to collect the fluid that may drip out of the rear axle before heading out to remove the pinion companion flange with the tool. Expel the seal utilising a blunt chisel and examine the pinion companion flange for nicks or damages, in which case have the former substituted. Inspect the pinion seal bore in the carrier for burr and professionally remove them. For refitting use Tool J-23911 or equivalent to refit a new seal, smear the pinion flange and sealing lip of the new seal with Special Seal Lubricant and then refit the pinion companion flange and nut and tighten the nut slightly beyond the alignment marks.
    You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Henry / Apr 03, 2025

Genuine GM Part 404294, the Right Choice

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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