Vehicles Equipped with 4L80E Transmission

The 4L80E transmission, an electronically controlled four-speed automatic transmission, has been employed in a wide range of vehicles over the years. Here’s a comprehensive list of vehicles that have featured this transmission:

Chevrolet

• 1991-1993 Chevrolet Caprice
• 1991-1999 Chevrolet Impala SS
• 1992-1999 Chevrolet Suburban
• 1992-1999 Chevrolet Tahoe
• 1995-1999 Chevrolet Express/GMC Savana
• 1999 Chevrolet Silverado 2500HD/3500

GMC

• 1991-1993 GMC Caprice
• 1992-1999 GMC Suburban
• 1992-1999 GMC Yukon
• 1995-1999 GMC Express/GMC Savana

Hummer

• 1992-2006 Hummer H1

Isuzu

• 1999-2004 Isuzu Hombre

Oldsmobile

• 1991-1993 Oldsmobile Custom Cruiser
• 1991-1996 Oldsmobile Ninety-Eight Regency

Pontiac

• 1991-1993 Pontiac Bonneville

Other

• 1997-2004 Freightliner MT-45
• 2000-2002 Navistar International 4000 Series/7000 Series

Detailed Specifications

The 4L80E transmission, produced by General Motors, offers robust performance and durability, making it suitable for various heavy-duty applications. Here are its key specifications:

– Number of Gears: 4 forward gears, 1 reverse gear
– Gear Ratios:
– 1st: 2.48:1
– 2nd: 1.48:1
– 3rd: 1.00:1
– 4th: 0.75:1
– Reverse: 2.07:1
– Overdrive Ratio: 0.75:1
– Maximum Input Torque Capacity: 440 lb-ft
– Weight: Approximately 230 lbs

Applications and Features

The 4L80E transmission is commonly found in full-size pickup trucks, SUVs, and heavy-duty vehicles. It is renowned for its ability to handle high torque levels and provide smooth shifting. Some of its notable features include:

– Electronically Controlled Shifting: The transmission is equipped with an electronic control module that optimizes shift points based on vehicle speed, load, and throttle position.
– Tow/Haul Mode: This feature adjusts the transmission’s shift schedule to enhance towing or hauling performance.
– Overdrive Lockup: The torque converter locks up in overdrive, improving fuel economy at highway speeds.
– Heavy-Duty Construction: The transmission is built with robust components to withstand demanding conditions.
– Wide Ratio Gear Set: The gear ratios are spaced apart to provide optimal performance and fuel efficiency.

Maintenance and Servicing

To ensure optimal performance and longevity of the 4L80E transmission, regular maintenance and servicing are crucial. Here are some key maintenance tasks:

– Fluid Changes: The transmission fluid should be changed every 50,000 to 100,000 miles, depending on driving conditions.
– Filter Replacement: The transmission filter should be replaced during fluid changes.
– Band Adjustments: The transmission bands may require adjustment over time to ensure proper shifting.
– Solenoid Checks: The transmission solenoids should be inspected and replaced if necessary.

Conclusion

The 4L80E transmission has proven its reliability and capability in a wide range of vehicles, from heavy-duty pickup trucks to SUVs and commercial applications. Its robust construction, electronically controlled shifting, and heavy-duty components make it an ideal choice for vehicles requiring a durable and efficient transmission. With proper maintenance and servicing, the 4L80E transmission can provide years of dependable performance.