Transmission Dimensions

Transmission Fluid Fill Capacities

JEGS 555-603020 GM 4L60E Performance Automatic Transmission Features:

• Handles up to 450 HP
• Heavy-duty sunshell withhardened splines
• Heavy-duty 3-4 clutch pack
• New EPC, PWM solenoid, 3-2 downshift, and pressure manifold switch
• Reman Pump with New 10 vane rotor, guide, vanes, and rings
• Shift kit
• Corvette servo
• Total transmission fluid capacity: 12.5 quarts
• Transmission fluid service capacity: 6 quarts
• Includes necessary seals and o-rings 
• Dipstick grommet
• Drain plug replacement seal
• Blue speedo seal (Application-specific)
• Yoke Seal (This must be installed when using a vented yoke.)

JEGS 555-603020 GM 4L60E Performance Automatic Transmission IMPORTANT Notes:

• This JEGS Performance Transmission has gone through rigorous testing to provide you with the best possible replacement transmission
• Here are a few tips to ensure a successful installation
  • Follow the manufactures instructions thoroughly
  • Before installation, flush any old fluid from your system, including transmission lines, oil cooler, and torque converter to remove any contaminants that could harm your new transmission
  • When installing your torque converter, follow the instructions carefully to ensure proper fitment into the transmission input shaft and also attaching to your engine. Specific tolerances are required so that you do not damage the front pump in the transmission or the converter.
• This Unit only works in vehicles with a 13 Pin wiring harness connector
• Does not come with a shifter bracket
• This transmission includes the bolt-on bell housing to fit GM LS-Series engines (Pre-LS engines should use transmissions 555-603010 or 555-603015).
• 1996-2002 Camaro/Firebird must reuse their old 4L60 tail-shaft housing since this transmission does not include the special housing that has the mount for the torque link.
• This transmission can also be used in an older vehicle when converting to an electronically controlled overdrive transmission. The conversion to older vehicles will require the use of a transmission controller, crankshaft spacer, special cross-member, driveshaft changes, and other modifications (these parts are not included with the transmission).
• If you have any problem installing this transmission, before returning it please call the JEGS technical support line. Our experts may be able to assist you with the proper installation.

FAQ

What is the best GM transmission for LS swap?

• The JEGS 603020 offers an excellent solution for LS swaps, providing a reliable and high-performance 4L60E transmission.

How much HP can a 4L60E take?

• The JEGS 603020 4L60E is built to handle up to 450 horsepower, ensuring durability and performance for your high-powered LS engine.