---
product_id: 439442601
title: "Fel-Pro BS 40640 Rear Main Seal Set"
brand: "fel-pro"
price: "$84.76"
currency: USD
in_stock: false
reviews_count: 5
category: "Fel Pro"
url: https://www.desertcart.us/products/439442601-fel-pro-bs-40640-rear-main-seal-set
store_origin: US
region: United States of America
---

# OEM-grade durability & leak-proof sealing Precision fit for 2003-2014 GM & Isuzu models Proudly engineered & made in the USA Fel-Pro BS 40640 Rear Main Seal Set

**Brand:** fel-pro
**Price:** $84.76
**Availability:** ❌ Out of Stock

## Summary

> 🔩 Seal the deal with Fel-Pro — where precision meets performance!

## Quick Answers

- **What is this?** Fel-Pro BS 40640 Rear Main Seal Set by fel-pro
- **How much does it cost?** $84.76 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/439442601-fel-pro-bs-40640-rear-main-seal-set)

## Best For

- fel-pro enthusiasts

## Why This Product

- Trusted fel-pro brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted with premium materials that meet or exceed original equipment specs, delivering unmatched durability and leak resistance.
- • **Made in the USA:** Manufactured domestically with strict quality control, supporting American craftsmanship and reliability.
- • **Tailored for Your Ride:** Fits a wide range of GM and Isuzu vehicles from 2003-2014, ensuring a perfect, application-specific fit every time.
- • **Hassle-Free Installation:** No assembly required and designed for seamless integration, saving you time and avoiding costly transmission drops.
- • **Professional-Grade Reliability:** Trusted by mechanics for over 50 years, this rear main seal set guarantees 100% vehicle sealing performance.

## Overview

The Fel-Pro BS 40640 Rear Main Seal Set is a high-quality, application-specific sealing solution designed for select GM and Isuzu vehicles (2003-2014). Engineered and manufactured in the USA, it meets or exceeds OEM standards to provide durable, leak-proof performance trusted by professionals for over five decades. This ready-to-install set ensures a perfect fit, preventing costly repairs and maintaining engine integrity.

## Description

FelPro gaskets offer 100% vehicle sealing with applicationspecific materials to give you sealing solutions with the performance and durability professionals trust.

Review: Has been a quality product for many many years (50 years in my case), so you can not go wrong with Fel-Pro.
Review: I chose this over a lot of other cheap, generic aftermarket rear main seals and gaskets. It's also mainly the rear main seal that's the most important, aside from the rear main cover gasket. I've seen a lot of the really cheap aftermarket rear main seals leak, so I wasn't going to take a chance; especially not after dropping my whole transmission and really not wanting to have to do that again in the next 10-20k miles (or maybe even less!). I did have a separate OEM GM LS rear main seal that I used, but this Fel-pro one is just as good, in my personal opinion. The cheap ones are sometimes a bit smaller in size, and the rubber material isn't as durable, which causes leaks as it gets heat-cycled. I also bought a billet aluminum rear main cover alignment tool, to center the rear main cover for installation (along with the new cover gasket), before using it to install the new rear main seal cover. I guess it's more exact to install using the alignment tool, but I've done it in the past with the rear main seal installed BEFORE re-installing the rear main cover, and I was still fine. Lastly, you'll also want to make sure to clean all the surfaces to the mating surfaces, including the oil pan gasket portion that the rear main cover sits on. I personally used Permatex ultra black RTV gasket maker, which is oil safe. The ultra gray version works as well, but I'm sure any high temp and oil-resistant RTV gasket maker, should do the trick just fine.

## Features

- COMPATIBILITY – Fits 2003-2006 Isuzu Ascender; 2004-2007 Buick Rainier; 2008-2009 Buick LaCrosse; 2008-2009 Buick Allure; 2003-2006 Cadillac Escalade ESV; 2007-2014 Cadillac Escalade ESV; 2002-2006 Cadillac Escalade EXT; 2007-2013 Cadillac Escalade EXT; 2
- GET THE RIGHT PART -- Before purchasing, please check the “desertcart Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the “desertcart Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please hover over the “i” on the bar to see notes before making your purchase
- Application specific design to ensure a perfect fit
- Meets or exceeds all original equipment specifications
- Engineered and manufactured specifically for repair applications
- Unsurpassed quality you can trust
- Validated for fit, form, and function

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000C2GA1Y |
| Assembly Required | No |
| Brand | Fel-Pro |
| Country of Origin | USA |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,987) |
| Date First Available | 7 August 2012 |
| Item Dimensions LxWxH | 30.5 x 27.9 x 2.8 Centimeters |
| Item Weight | 22.7 g |
| Item model number | BS40640 |
| Manufacturer | Fel-Pro |
| Manufacturer Part Number | BS40640 |
| Model | BS 40640 |
| OEM Part Number | BS40640 |
| Product Dimensions | 30.48 x 27.94 x 2.79 cm; 22.68 g |

## Product Details

- **Brand:** Fel-Pro
- **Global Trade Identification Number:** 00614046626461
- **Manufacturer:** Fel-Pro
- **UPC:** 614046626461

## Images

![Fel-Pro BS 40640 Rear Main Seal Set - Image 1](https://m.media-amazon.com/images/I/41KJ47aYITL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***N on 24 January 2026*

Has been a quality product for many many years (50 years in my case), so you can not go wrong with Fel-Pro.

### ⭐⭐⭐⭐⭐ Review
*by B***. on 15 September 2025*

I chose this over a lot of other cheap, generic aftermarket rear main seals and gaskets. It's also mainly the rear main seal that's the most important, aside from the rear main cover gasket. I've seen a lot of the really cheap aftermarket rear main seals leak, so I wasn't going to take a chance; especially not after dropping my whole transmission and really not wanting to have to do that again in the next 10-20k miles (or maybe even less!). I did have a separate OEM GM LS rear main seal that I used, but this Fel-pro one is just as good, in my personal opinion. The cheap ones are sometimes a bit smaller in size, and the rubber material isn't as durable, which causes leaks as it gets heat-cycled. I also bought a billet aluminum rear main cover alignment tool, to center the rear main cover for installation (along with the new cover gasket), before using it to install the new rear main seal cover. I guess it's more exact to install using the alignment tool, but I've done it in the past with the rear main seal installed BEFORE re-installing the rear main cover, and I was still fine. Lastly, you'll also want to make sure to clean all the surfaces to the mating surfaces, including the oil pan gasket portion that the rear main cover sits on. I personally used Permatex ultra black RTV gasket maker, which is oil safe. The ultra gray version works as well, but I'm sure any high temp and oil-resistant RTV gasket maker, should do the trick just fine.

### ⭐⭐⭐⭐⭐ Review
*by A***O on 29 June 2023*

Excelente producto

## Frequently Bought Together

- FEL-PRO BS 40640 Engine Crankshaft Seal Kit for Chevrolet Silverado 1500
- FEL-PRO OS 30693 R Engine Oil Pan Gasket Set for Chevrolet Silverado 1500
- FEL-PRO TCS 45993 Engine Timing Cover Gasket Set for Chevrolet Silverado 1500

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/439442601-fel-pro-bs-40640-rear-main-seal-set](https://www.desertcart.us/products/439442601-fel-pro-bs-40640-rear-main-seal-set)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-27*