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Ships within 48 hours · Estimated delivery Sep 2 - Sep 7
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Description
1977-1990 B-Body Crossmember RCB3-400Fits Models: Caprice, Impala, LeSabre, Oldsmobile 88, Bonneville, Parisienne, Catalina Fits Years: 77 90 Fits Transmissions: TH400 Short Tail, 2004R, 700R4 with B Body tailshaft Mount For Classic B Body builders, we've designed a direct bolt in transmission crossmember to accommodate both a 2004R or TH400 short tail transmissions, as well as a 700R4 with the tailshaft transmission mount. One crossmember, both transmissions! We accommodate both by
- Fits Models: Caprice, Impala, LeSabre, Oldsmobile 88, Bonneville, Parisienne, Catalina
- Fits Years: 77-90
- Fits Transmissions: TH400 Short Tail, 2004R, 700R4 with B-Body tailshaft Mount
- For Classic B-Body builders, we've designed a direct bolt-in transmission crossmember to accommodate both a 2004R or TH400 short tail transmissions, as well as a 700R4 with the tailshaft transmission mount. One crossmember, both transmissions!
- We accommodate both by using a second set of mounting holes on the crossmember which allows you to position the crossmember in two different locations while still using the factory crossmember mounting locations.
- No drilling, cutting, grinding, or welding is required.
- When considering the popular 700R4 or 4L65E, there are two basic transmission mount locations. One version utilizes a transmission mount directly behind the transmission pan on the transmission case. With the other version the transmission mount is located further forward and bolts to the tailshaft housing. It is crucial that you properly determine which mount location your 700R4 / 4L65E utilizes. The RCB3-400 is designed to accommodate the longer tailshaft mount. If you have the shorter case mount transmission, you will need to purchase our RCB3-700 crossmember.
- We recommend a polyurethane transmission mount. The GMTM is sold separately.
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1977-1981 | Pontiac | Bonneville | |
| 1977-1990 | Chevrolet | Caprice | |
| 1977-1981 | Pontiac | Catalina | |
| 1977-1990 | Oldsmobile | Custom Cruiser | |
| 1980-1983 | Buick | Estate Wagon | |
| 1977-1985 | Chevrolet | Impala | |
| 1977-1985 | Buick | LeSabre | |
| 1983-1986 | Pontiac | Parisienne | |
| 1977-1978 | Buick | Riviera | |
| 1987-1989 | Pontiac | Safari |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Stylish, spacious, and perfect for travel
Color: Upgrade-apricot, Size: 16 Inch
This backpack is well-made and very practical for travel. It offers plenty of space, well-organized compartments, and feels comfortable to carry even for long periods. The design is sleek and modern, making it suitable for both travel and daily use. Great quality for the price.
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Reviewed in the United States on January 31, 2026
★★★★★ 5
Great quality and very practical
Color: Upgrade-apricot, Size: 16 Inch, Color: Upgrade-apricot, Size: 16 Inch
I’m very happy with this backpack. The material feels sturdy and well-made, with a smooth finish that looks elegant and easy to clean. The size is perfect—not too big or bulky, but still spacious enough to carry everything I need. The stitching and zippers feel strong and reliable.
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Reviewed in the United States on January 20, 2026
★★★★★ 5
Great quality for the price!
Color: Upgrade-darkgreen, Size: 16 Inch
Great backpack with lots of pockets. Due to the price I was worried about the quality, but I have used it for a few months now and it's holding up great. Love the color and would recommend!
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Reviewed in the United States on May 1, 2026
★★★★★ 4
Good for travel
Color: Regular-black, Size: 16 Inch
Good looking backpack for travel. Compact and good quality.
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Reviewed in the United States on July 29, 2025
★★★★★ 5
Great Backpack!
Color: Upgrade-apricot, Size: 16 Inch
Great quality for the price and had a lot of space and pockets, which is super convenient!
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Reviewed in the United States on May 15, 2026