SKF 37400A Engine Crankshaft Seal - Rear

SKF Rear Crankshaft Seal for Ford, Mazda, Lincoln

SKF 37400A is a rear crankshaft seal built for rear engine sealing applications where oil control and contamination resistance matter. With a Teflon sealing surface and application-specific dimensions, it is designed for a precise seal at the crankshaft rear position on a wide range of Ford, Mazda, Lincoln, Mercury, and Land Rover vehicles.

SKF has a long history in shaft seal engineering, and the 37400A reflects that focus with premium materials and a design matched to the demands of the application. This part number is also referenced as 37400A for ordering and service lookup.

Key Features

• Teflon sealing surface type for rear crankshaft sealing applications
• Width: 0.543 in.
• Outside diameter: 4.669 in.
• Shaft diameter: 3.740 in.
• Engine crankshaft seal for the rear position
• SKF 37400A cross-references OE-style service numbers for the same application

Detailed Description

SKF 37400A is an engine crankshaft seal for the rear position, engineered to help maintain proper oil retention at the back of the crankshaft. The Teflon sealing surface is selected for sealing performance in demanding engine environments, while the listed dimensions support accurate fitment during service. This part is used across many rear crankshaft seal applications, including Ford Edge, Ford Escape, Ford Fusion, Ford Mustang, Lincoln MKZ, Mazda 3, Mazda 6, and Mazda MX-5 Miata models.

SKF seals are manufactured to specific designs using premium materials, with attention to the operating environment and long-term sealing performance. This part cross-references Ford 1S7G6K318AF and Lincoln LR041955 for the same application.

Vehicle Fitment

• Fits 2019-2024 Lincoln Nautilus, rear.
• Fits 2012-2021 Ford Edge, rear.
• Fits 2013-2021 Ford Escape, rear.
• Fits 2015-2021 Ford Mustang, rear.
• Fits 2006-2020 Ford Fusion, rear.
• Fits 2011-2020 Lincoln MKZ, rear, w/Retainer.
• Fits 2015-2019 Lincoln MKC, rear, w/Retainer.
• Fits 2013-2018 Ford Focus, rear, w/Retainer.
• Fits 2000-2007 Ford Focus, rear, w/Retainer.
• Fits 2013-2017 Ford C-Max, rear, w/Retainer.
• Fits 2005-2017 Ford Escape, rear, w/Retainer.
• Fits 2016-2017 Ford Explorer, rear, w/Retainer.
• Fits 2013-2017 Ford Taurus, rear.
• Fits 2014-2017 Ford Transit Connect, rear, w/Retainer.
• Fits 2013-2016 Lincoln MKT, rear.
• Fits 2012-2015 Ford Explorer, rear.
• Fits 2015 Land Rover Discovery Sport, rear, w/Retainer.
• Fits 2013-2015 Land Rover LR2, rear, w/Retainer.
• Fits 2012-2015 Land Rover Range Rover Evoque, rear, w/Retainer.
• Fits 2015 Mazda MX-5 Miata, rear.
• Fits 2006-2014 Mazda MX-5 Miata, rear.
• Fits 2004-2013 Mazda 3, rear.
• Fits 2012-2013 Mazda 5, rear.
• Fits 2006-2010 Mazda 5, rear.
• Fits 2003-2013 Mazda 6, rear.
• Fits 2010-2012 Ford Transit Connect, rear.
• Fits 2001-2011 Ford Ranger, rear.
• Fits 2008-2011 Mazda Tribute, rear.
• Fits 2005-2011 Mercury Mariner, rear, w/Retainer.
• Fits 2006-2011 Mercury Milan, rear, w/Retainer.
• Fits 2005-2006 Mazda Tribute, rear, w/Retainer.

Common Problems This Seal Helps Address

• Rear main oil leakage at the crankshaft seal area
• Oil seepage that can leave residue on the transmission bellhousing
• Contamination entering the rear crankshaft sealing zone
• Loss of crankcase oil from a worn or damaged rear seal
• Service repeat repairs caused by an incorrect seal profile or size

Installation Notes and Tips

Confirm the rear seal location and any retainer-style application before installation. Match the seal dimensions and sealing surface type to the engine specification, and inspect the crankshaft sealing surface for wear, scoring, or contamination before assembly. Clean the mating surfaces thoroughly and follow the vehicle service procedure for seal orientation and seating depth.

Quality Assurance

SKF has a long history in shaft seal design and manufacturing, beginning with the first integrated shaft seal in 1928. The 37400A is produced to specific design requirements with premium materials and quality-focused manufacturing for consistent sealing performance.