National
Automatic Transmission Extension Housing Seal
$27.10
National
Part # 2457
4.7(47 reviews)Joint transm auto
Fits Chevrolet, GMC, Hummer & more — 416 vehicle applications
$67.41
Only 3 left in stock
1
Express Checkout
Free ShippingOrders $99+
WarrantyManufacturer backed
Easy Returns30-day policy
Canadian OwnedShipped across Canada
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National 2457 Vehicle Fitment
Fits 416 vehiclesThis Joint transm auto fits Chevrolet, GMC, Hummer, Workhorse vehicles.
2009 Chevrolet Express 4500
2007 Chevrolet Silverado 2500 HD Classic
2007 Chevrolet Silverado 3500 Classic
2002 Chevrolet Avalanche 2500
2001-2006 Chevrolet Silverado 2500 HD
2001-2006 Chevrolet Silverado 3500
2000-2002 Chevrolet Suburban 2500
1999-2004 Chevrolet Silverado 2500
1996-2009 Chevrolet Express 2500
1996-2009 Chevrolet Express 3500
1992-1999 Chevrolet C1500 Suburban
1992-1999 Chevrolet C2500 Suburban
1991-2002 Chevrolet C3500HD
1991-2000 Chevrolet C2500
1991-2000 Chevrolet C3500
1991-2000 Chevrolet K2500
1991-2000 Chevrolet K3500
1991-1999 Chevrolet C1500
1991-1999 Chevrolet K1500
National 2457 Specifications
- Shaft Diameter
- 53.980
- Type
- 74
- Width
- 13.970
- Flanged Outside Diameter
- 3.150
- Redicoat
- Yes
- Inside Diameter
- 53.980
National 2457 Product Description
National 2457 Boîte automatique – Carter arrière – Joint pour Chevrolet Silverado 2500 HD
Key Features
- Delivers quality and reliable performance for every type of repair
- Design type: spring loaded; multi-lip
- Low swell in hydrocarbon fluids
- Resistance to EP lubricants
- Temperature range: -20°F to 300°F / -29°C to 49°C
- Baja expansión en fluidos de hidrocarburos
- Ofrece un rendimiento confiable de calidad para cada tipo de reparación
- Rango de temperatura: -20°F a 300°F / -29°C a 49°C
- Resistente a lubricantes EP
- Tipo de diseño: Carga de resorte; multi-labio
National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
About National
Shop National Automatic Transmission Extension Housing Seal at Autrex with vehicle fitment details, current pricing, and checkout options for the National 2457. Eligible orders over $99 may qualify for free shipping, with some exceptions.
Ratings & Reviews
4.7out of 5
Based on 47 reviews
- 538
- 46
- 31
- 21
- 11
- Direct fit, no surprisesMarc D.Verified BuyerMay 28, 2026
Lined up perfectly with the original. Install took about an hour with the right press. Solid feel back in the steering, no more clunk over bumps.
Installed on 2016 Ram 1500
- Shipped fast across CanadaJen P.Verified BuyerMay 14, 2026
Ordered on a Monday, had it by Wednesday in Calgary. Greasable fitting is a nice touch. Quality looks on par with OEM.
Installed on 2014 Chevrolet Silverado 1500
- Good part, double-check your sideSteve R.Verified BuyerApr 30, 2026
Works great so far. Just confirm fitment for your exact trim before ordering — the fitment list on the page was accurate for mine.
Installed on 2017 Ford F-150
- Quiet againAmrit S.Verified BuyerApr 19, 2026
Replaced both sides at the same time. The knocking noise is completely gone. Boot quality feels durable.
Installed on 2015 GMC Sierra 1500
- Would buy againDaniel L.Mar 22, 2026
Second one I've bought from Autrex. Packaging was secure and the part matched the photos exactly.
Installed on 2013 Dodge Durango
Frequently Asked Questions — National 2457
What vehicles does the National 2457 fit?
The National 2457 fits 50 vehicle applications including 2009 Chevrolet Express 4500, 1996-2009 Chevrolet Express 2500, 1996-2009 Chevrolet Express 3500, 2009 GMC Savana 4500, 1996-2009 GMC Savana 2500 and 45 more. Check the full fitment list above to confirm your vehicle.
What are the shipping options for the National 2457?
Shipping options for the National 2457 are shown during checkout and may vary by item, address, and availability. Eligible orders over $99 may qualify for free shipping, with some exceptions. Call 1-866-461-2787 if you need help confirming shipping or pickup before ordering.
How much does the National 2457 cost?
The National 2457 is currently listed at $67.41 CAD at Autrex. Final price, shipping, taxes, and availability are confirmed during checkout. Call 1-866-461-2787 if you need help before ordering.
Is the Joint transm auto a direct fit replacement?
Yes, the Joint transm auto by National is designed as a direct fit replacement. Use our vehicle selector to confirm compatibility with your specific vehicle.
What warranty does the Joint transm auto come with?
The Joint transm auto comes with the standard National manufacturer warranty. Please check the product specifications for exact warranty terms.
