4L60E, 4L65E & 4L70E Transmissionsfor 1998–2013 GM Vehicles

Shop Twisted Torque 4L60E, 4L65E and 4L70E transmissions for select 1998–2013 GM trucks, SUVs and performance vehicles. Choose from multiple build levels for dependable street use, modified engines and high-performance applications. Select the correct year, engine and 2WD or 4WD setup below.

Built 4L60E, 4L65E and 4L70E Transmissions

The GM 4L60E, 4L65E and 4L70E belong to the same four-speed automatic overdrive transmission family. These transmissions were used in many Chevrolet, GMC, Cadillac, Pontiac and other GM vehicles, including the Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Trailblazer and select performance applications.

Twisted Torque offers multiple build levels for stock and modified vehicles. Every transmission is built to order and matched to the customer’s year, engine, drivetrain and intended use.

What Is the Difference Between the 4L60E, 4L65E and 4L70E?

These transmissions share the same basic design and can look nearly identical from the outside, but GM used different internal parts and calibrations according to the vehicle and transmission version.

The 4L65E was developed for greater load capacity than the standard 4L60E and commonly received stronger factory parts, including five-pinion planetary gearsets and added 3–4 clutch capacity.

The 4L70E is a later version with additional factory changes for selected higher-load applications. However, a transmission’s model name does not establish its true horsepower capacity. The shafts, drums, clutches, planetary gearsets, valve-body work and torque converter used in the complete build determine its strength.

A performance-built 4L60E can be stronger than a stock 4L65E or 4L70E.

1998–2008 and 2009–2013 Electronics

This category includes two important electronic groups:

1998–2008 Transmissions

These transmissions generally use the earlier pressure-manifold-switch arrangement and matching internal wiring. Exact fitment still depends on the vehicle year, engine, bellhousing, converter, speed sensors and drivetrain.

2009–2013 Transmissions

Many 2009–2013 applications use the later internal mode switch and 17-pin electrical connection. These units are not automatically interchangeable with earlier transmissions, even when the case and bellhousing appear similar.

The correct transmission must match the vehicle computer and wiring. A transmission should never be selected by appearance alone.

GM 4.3L, 4.8L and 5.3L Applications

The 4L60E family was commonly installed behind GM 4.3L V6, 4.8L V8 and 5.3L V8 engines, but the exact transmission changed by year, vehicle and option package.

The 4.3L and 4.8L Silverado and Sierra continued using a four-speed automatic through the 2013 model year. Many later 5.3L applications moved to the 6L80 six-speed transmission, so engine size alone cannot identify the transmission.

Always verify the vehicle year, engine, RPO code and number of forward gears before ordering.

Not Every 1998–2013 Transmission Interchanges

GM used several versions of this transmission family during the listed years. Important differences may include:

• 1998–2008 or 2009–2013 electronics
• 4L60E, 4L65E or 4L70E internal setup
• 2WD, 4WD or AWD output shaft
• Transmission and transfer-case speed sensors
• Bellhousing style and depth
• Torque converter and input shaft
• Rear housing or tailhousing
• Vehicle computer and calibration
• Camaro, Corvette and other special rear housings

A transmission may bolt to the engine and still be wrong for the vehicle electronically or mechanically.

2WD, 4WD and AWD Transmissions

A 2WD transmission uses a different output shaft and rear housing than most 4WD applications. Four-wheel-drive transmissions must match the transfer-case adapter, transfer-case input and speed-sensor setup.

Changing a transmission from 2WD to 4WD usually requires complete disassembly to replace the output shaft. This should be determined before the transmission is built.

Some 4WD vehicles receive the vehicle-speed signal through the transfer case rather than the transmission. Twisted Torque will verify the correct setup when required.