SKU: 85958240347
8th gear car

8th gear car GM Performance 8-Speed Automatic

Sale price$22.91 Regular price$25.45
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

8th gear car GM Performance 8-Speed AutomaticGM Performance 8 Speed Automatic 8L90 Blackbridge Engineering 4x4 Edition for Mark IV Take your Mark IVs performance to the next level with the GM Performance 8 Speed Automatic 8L90 transmission, expertly modified by Blackbridge Engineering to be 4x4 ready. This transmission is purpose built to seamlessly bolt into your Mark IV, perfectly integrating with our custom Mark IV transfer case and GM LT1 engine. Offering smooth, high performance shifting

GM Performance 8-Speed Automatic 8L90 – Blackbridge Engineering 4x4 Edition for Mark IV

Take your Mark IV’s performance to the next level with the GM Performance 8-Speed Automatic 8L90 transmission, expertly modified by Blackbridge Engineering to be 4x4-ready. This transmission is purpose-built to seamlessly bolt into your Mark IV, perfectly integrating with our custom Mark IV transfer case and GM LT1 engine. Offering smooth, high-performance shifting and rugged durability, this 8-speed automatic is designed for those who demand both power and off-road capability.

Key Features:

  • 4x4-Ready Modification: Blackbridge Engineering has modified the 8L90 transmission for full 4x4 compatibility, allowing you to harness the power of GM’s performance transmission across a variety of terrains with confidence.
  • Seamless Integration: Engineered to bolt directly into your Mark IV with our Mark IV transfer case and LT1 engine, this transmission eliminates the need for major modifications. Enjoy a factory-like fit and function with maximum reliability.
  • High-Performance Shifting: The 8L90 delivers smooth, precise gear changes, with eight well-spaced ratios to optimize both acceleration and fuel efficiency, whether you’re cruising on the highway or tackling tough off-road trails.
  • Rugged Durability: Built to handle the high torque of the LT1 engine, the 8L90’s robust design ensures it can handle the most demanding conditions, providing the strength and durability you need for both street and off-road driving.

Transmission Specs:

  • Type: 8-speed automatic transmission
  • Ratios:
    • 1st: 4.56
    • 2nd: 2.97
    • 3rd: 2.08
    • 4th: 1.69
    • 5th: 1.27
    • 6th: 1.00
    • 7th: 0.85
    • 8th: 0.65
  • Max Torque Capacity: 664 lb-ft
  • Construction: Lightweight aluminum case with heavy-duty internal components for maximum strength

Ideal for:

  • Off-Road Enthusiasts: Modified to be 4x4-ready, this transmission is perfect for those looking to take their Mark IV off-road, providing exceptional control and power delivery across rough terrains.
  • Street Performance: With eight gears delivering smooth transitions and improved fuel efficiency, the 8L90 is just as at home on the street as it is in the dirt, making it a versatile choice for a wide range of driving styles.
  • Custom Builds: Perfect for Mark IV builds paired with the LT1 engine and Blackbridge’s transfer case, creating a powerful and fully integrated drivetrain solution.

Compatibility:

  • Designed for seamless integration with the GM LT1 engine and Blackbridge’s custom Mark IV transfer case, offering a true bolt-in solution for all Mark IV models.

Why Choose Blackbridge Engineering’s 8L90 for Mark IV:

  • 4x4-Ready from the Start: Our modifications ensure the transmission is ready for off-road use, making your Mark IV capable of conquering any terrain.
  • Plug-and-Play Solution: With direct compatibility with our LT1 engine and transfer case, this transmission installs effortlessly, saving time and eliminating complex modifications.
  • Expertly Engineered: Blackbridge Engineering’s attention to detail ensures top-tier performance, reliability, and durability, whether you’re driving on highways or off-road trails.

Upgrade your Mark IV with the GM Performance 8L90 8-Speed Automatic transmission, modified by Blackbridge Engineering to be 4x4-ready and fully compatible with our LT1 engine and Mark IV transfer case. Experience unmatched power, seamless integration, and rugged performance.

Order now and elevate your Mark IV’s drivetrain with Blackbridge Motors.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 85958240347

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C. Coleman
West Palm Beach, US
★★★★★ 5
Quality Case
Color: Pink
This is an All in Pne case. I really like the lavender color with sparkles. It is a little heavier than expected but I still love it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
A
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Amazon Customer
Alexandria, US
★★★★★ 3
Ok, but don’t use hand cream
Color: Black, Color: Black
I like the case for its ability to house the keyboard, the pencil and the iPad in one convenient place. I find that the magnetic closure and magnets holding the keyboard are not as strong as a previous case I had purchased. The keyboard is great, I like the touchpad and the backlight colors. The cover material is not hand lotion friendly! I’ve tried water and lens cleaning wipes, and neither gets this cover clean. I hesitate to use any chemicals because the material is the type that will get sticky and nasty, and I don’t like that. I’ve included a photo of what the cover looks like after using a lens cleaning wipe. If the magnets were stronger and the cover material easier to clean, I would buy again.
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Reviewed in the United States on February 27, 2026
S
Verified Purchase
Seth Walton
Dallas, US
★★★★★ 4
great case!
Color: Navy Blue
pros; the color is beautiful. I picked the navy blue. It is exactly as the description described. It goes very well with my blue iPad. The size is very precise and fits perfectly on my iPad. The magnet that holds the case together is very strong. The iPad itself can pivot vertically and horizontally using that magnet. This works very smooth. The magnet closure for the case itself is strong and holds well. The magnet that holds the keyboard in place also works very well. Cons; when the keyboard is in its correct position, it is difficult to angle the iPad in front into the provided grooves. The keyboard gets into the way. This prevents the iPad from reaching the grooves provided. The keyboard feels very light and cheap. The keyboard itself connected with the Bluetooth very easily. It works wonderful. I love the back light on the keyboard. The color of the keyboard is wonderful. However, as I said above, it does feel a bit cheap. But for 20 bucks, what can you ask for. When the case is folded together with the keyboard in the iPad, it is a bit bulky. But I knew that from the previous reviews and was expecting it. What I love most about this case is that the iPad can be removed using the magnet on the back from the keyboard portion, but it is still protected by the exterior plastic case. So in situations where I don’t need to use my keyboard, I can remove the iPad itself and know that it’s still protected overall I recommend this product.
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Reviewed in the United States on January 18, 2026
A
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Amazon Customer
Cuba, US
★★★★★ 5
Nice Case & Keyboard
Color: Blue
Love this case with a keyboard. I like using the keyboard vs using one on the screen of iPad. And the keyboard has rechargeable batteries instead of having to buy batteries. And it protects my iPad.
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Reviewed in the United States on May 20, 2026
E
Verified Purchase
Eli Beltran
Lowell, US
★★★★★ 1
Beautiful, and everything I want it except that the keyboard keys didn’t work😭
Color: Light Pink
I searched and search for the right keyboard case for me. The most important thing for me was to be able to remove the iPad case itself from the whole case and keyboard, and this one was it. Unfortunately, when I started checking the keyboard a lot of The keys were not output in the correct symbol or letters. So defeats the whole purpose of having a keyboard. I returned it and asked for a replacement, thinking that the item was defected, but when I got the New replacement, it was the same thing so I tried to contact the seller, but there was no option to do that. Therefore, I had to return the second replacement keyboard and look for another keyboard cover.
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Reviewed in the United States on March 23, 2026

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