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SM465 Transmission for Sale

  • Type: Manual Transmission
  • Model: SM465
  • Maker: General Motors
  • Speeds: Four-speed
  • Condition: Used


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About SM465 Transmission For Sale

The SM465 is a heavy-duty, four-speed manual transmission produced by General Motors, known for its durability and reliability. It features a rugged cast iron case and is commonly found in GM trucks and SUVs from the 1960s to the early 1990s. The transmission includes a very low first gear, making it ideal for heavy towing and off-road applications. It is renowned for its robust construction, making it a favorite among truck enthusiasts and for heavy-duty use. Despite its age, the SM465 remains popular due to its strength and dependable performance in demanding conditions.

The Legacy of the SM465 Transmission

The SM465, produced by General Motors from 1968 to 1991, has earned a reputation as one of the most durable manual transmissions ever made.  Its robust design, featuring a cast iron case and a low first gear, made it ideal for heavy towing and off-road applications. The transmission’s reliability and ability to handle demanding tasks have made it a favorite among truck enthusiasts and those needing a workhorse for tough conditions. Today, the SM465 is still sought after for restorations and custom builds, a testament to its enduring reputation and legacy.

Why Choose an SM465 Transmission for Sale?

  • Heavy-Duty Design: The SM465 is known for its robust and durable construction, making it suitable for heavy-duty applications.
  • Four-speed: It has four forward gears and one reverse gear. The first gear is a low “granny” gear that is not synchronized.
  • Cast Iron Case: The transmission case is made of cast iron, contributing to its durability.
  • Non-Synchronized First Gear: The first gear is a low gear primarily used for heavy towing or off-road applications and is not synchronized, meaning the vehicle must be at a complete stop to engage it smoothly.
  • Synchronized Second, Third, and Fourth Gears: The remaining gears are synchronized, allowing for smoother shifts while the vehicle is in motion
  • Top-Loaded Design: The SM465 has a top-loaded design, with the shifter mounted directly on top of the transmission, providing a direct and sturdy shifting mechanism.
  • Tapered Roller Bearings: This transmission uses tapered roller bearings for the input and output shafts, contributing to its ability to handle heavy loads and provide longevity.
  • Interchangeable Parts: Many parts of the SM465 are interchangeable with other GM transmissions, making repairs and maintenance easier and more cost-effective.

SM465 Transmission Fits with


  • Chevrolet and GMC Trucks: C/K Series (1968-1991), Silverado and Sierra (1968-1991)
  • Chevrolet Blazer: K5 Blazer (1968-1991)
  • GMC Jimmy: Full-size Jimmy (1968-1991)
  • Chevrolet Suburban: C/K Suburban (1968-1991)
  • Chevrolet and GMC Vans: G-Series Vans (1968-1991)
  • Military Vehicles: Various GM-based military vehicles
  • Custom Builds and Conversions:m Due to its durability and versatility, the SM465 is also popular in custom off-road vehicles and hot rods.


    • Small Block V8 Engines: Chevrolet 283, Chevrolet 305, Chevrolet 327, Chevrolet 350, Chevrolet 400
    • Big Block V8 Engines: Chevrolet 366, Chevrolet 396, Chevrolet 402, Chevrolet 427, Chevrolet 454
    • Inline Engines: Chevrolet 250 Inline-6, Chevrolet 292 Inline-6
    • Diesel Engines: Chevrolet 6.2L Diesel, Chevrolet 6.5L Diesel
    • V6 Engines: Chevrolet 4.3L V6
    • Custom and Aftermarket Engines:- 
    • GM LS Engines: The SM465 can be mated to modern GM LS-series engines with appropriate adapters.
    • Other Engines: It can also be adapted to work with non-GM engines using various aftermarket bell housings and adapters

Why Buy Your SM465 Transmission from Us?

  • Quality Assurance: All our SM465 transmissions for sale undergo rigorous testing
  • Competitive Pricing: Get the best value for your SM465 for sale

Upgrade Your Ride Today!

Take advantage of the opportunity to enhance your vehicle’s performance with this SM465 transmission for sale at our site. Whether you’re an off-road enthusiast or a heavy-duty truck owner, our SM465 for sale options will meet and exceed your expectations.

 Contact us today to find the perfect SM465 transmission for your needs. Our expert team is standing by to help you make the best choice for your vehicle.

Additional information

Torque Rating

465 lb.-ft

Overall Length

12 inches

Bellhousing to Tailshaft Length

19.375 inches


175 lbs

Fluid Type

SAE 80W-90 gear oil

Fluid Capacity

4 quarts

Input Shaft

Spline Count: 10 splines
Diameter: 1.125 inches

Output Shaft

Spline Count: 10 splines
Diameter: 1.375 inches

Gear Ratios

First Gear: 6.55:1
Second Gear: 3.58:1
Third Gear: 1.70:1
Fourth Gear: 1.00:1 (Direct Drive)
Reverse Gear: 6.09:1


1968 GM SM465 Transmission


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Product Q&A

Availability of SM465 Transmission for Sale?

Here at Find Auto Parts Online, you will find the best quality SM465 Transmission for Sale at a very reasonable price.

What is the price of the SM465 Transmission for Sale?

Here at Find Auto Parts Online, you will find the best quality SM465 Transmission for Sale at a very reasonable price. Please call or Contact us here.

Are parts for the SM465 still available?

Due to its popularity and long production run, parts and rebuild kits for the SM465 are widely available, making it a practical choice for restorations and custom builds.

What makes the SM465 suitable for off-road applications

The SM465's heavy-duty construction, low first gear, and robust design make it highly suitable for off-road driving, providing excellent control and torque for challenging terrains.

Can the SM465 be rebuilt or serviced?

Yes, the SM465 can be rebuilt or serviced by experienced transmission mechanics. Rebuild kits and replacement parts are available to address common wear and tear issues

How durable is the SM465 transmission?

The SM465 is known for its durability and strength, thanks to its cast iron construction and robust design. It's capable of handling heavy loads and rough terrain, making it a popular choice for off-road enthusiasts and work trucks.

Does the SM465 have an overdrive gear?

No, the SM465 is a four-speed transmission without an overdrive gear. However, aftermarket overdrive units can be installed to improve highway fuel efficiency and reduce engine RPM at cruising speeds.
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