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JEGS 603020

JEGS 4L60E Performance Transmission for 2005 & Earlier LS-Series Engines


made in usa
Save $20 Off $250, $50 Off $500, $100 Off $1,000, $150 Off $2,000. Promo Code: SAVEMORE exclusions apply

Truck Freight:$119.00
JEGS 4L60E Performance Transmission for 2005 & Earlier LS-Series Engines $1,599.99
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1 left in stock
4L60E Performance Transmission
  • 2005 & Earlier LS-Series Engines
  • Rear Wheel Drive
  • Lockup
  • Case Fill
  • Dyno Tested
  • Items You May Also Consider

    JEGS 603020 Details

    GM 4L60E

    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).

    This Unit only works in Vehicles with a 13 Pin wiring harness connector.


    • Handles Up To 450 HP
    • Heavy Duty Sunshell
    • Heavy Duty 3-4 Clutch Pack
    • New Electronics
    • Reman Pump with New Rotor Vane Slide and Stator Support
    • Shift Kit
    • Corvette Servo
    • 0.500 Boost Valve
    • Made in the USA

    NOTE: If you have any problem installing this transmission, before returning it please call the JEGS technical support line at 1-800-345-4545. Our experts may be able to assist you with the proper installation.


    Sold individually
    Trans-Brake Included
    Valve Body Style
    Dipstick Included
    Case Material
    Fluid Fill Location
    Input Spline Quantity
    Safety Rating
    Not SFI Approved
    Pan Type
    Yoke Style
    Slip On
    First Gear Ratio (Automatic Transmissions)
    Tailshaft Length (in.)
    Engine Type
    Shift Pattern
    Shipping Weight:
    Package Height:
    Package Depth:
    Package Width:

    Performance Transmissions that Won't Bust the Budget

    These transmissions are remanufactured with a performance shift kit and all new bands, clutch plates, steel plates, seals, gaskets, etc. to consistently handle up to 450 horsepower with minimal effort. A rebuilt front pump and recalibrated valve body ensure smooth-running transmissions with lasting reliability. The chrome pan with drain plug (except where noted) makes them look as good as they go!

    Fluid Capacities

    Transmission Dimensions

    JEGS EZ Kits are designed by JEGS professionals to ensure that you get all the correct parts you need.

    603020 is rated 3.0 out of 5 by 2.
    Rated 2 out of 5 by from Shift solenoid a I really hate writing bad reviews. But I bought this 4L60E in Hopes to have my GTO back but now after installing. Trying to figure out what's going on with shift solenoid a for a P0753 code "shift solenoid a electrical" pretty bummed after installing to find out my car would still be on jack stands. Packaging was great and transmission looked great on the outside but its stuck in limp mode for now..
    Date published: 2019-08-14
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    Does this come with torque converter?

    Asked by: Kornbred
    No, this does not come with the torque converter.
    Answered by: Rusty B
    Date published: 2018-10-31

    Will this Transmission Jegs part # 555-603020 fit my 2001 Chevy 5.3 L engine which I have a 2 Wheel drive pickup with a 4L60E transmission. Thanks!

    Asked by: KC Houston
    Yes, this should work in your Chevy truck.
    Answered by: Rusty B
    Date published: 2018-07-18

    whats the warranty?

    Asked by: 03LSXTT
    These transmissions have a 1 year warranty.
    Answered by: Rusty B
    Date published: 2018-04-18

    Will this fit a 98 tahoe 5.7 4 wheel drive?

    Asked by: yobtaF
    No, this is made to fit the LS series of engines. Please look at this link - http://www.jegs.com/i/JEGS-Performance-Products/555/603015/10002/-1
    Answered by: Rusty B
    Date published: 2018-04-04

    2000 Chevy Silverado 1500 5.3 LS 325, Not sure what Transmission had in it but seems it was , Would this be a Solid Fitment?

    Asked by: BigMumbles
    This would work for most 2wd applications. This will be an easy installation if you are replacing a 4L60E
    Answered by: Rusty B
    Date published: 2018-03-21

    I'm look at this for a direct replacement in a 1998 Chevy Tahoe 2dr 2wd 5.7. If this will fit can you recommend a converter to go with this please. Thank You!

    Asked by: Jim Pape
    If this is replacing a 4L60E then this will work. this is a good converter - http://www.jegs.com/i/ACC-Performance/082/4945HD/10002/-1
    Answered by: Rusty B
    Date published: 2018-03-16

    Will this fit in a 1997 GMC Sierra k1500 5.7L?

    Asked by: SwimmiestFish
    You will probably need this transmission - http://www.jegs.com/i/JEGS-Performance-Products/555/603010/10002/-1
    Answered by: Rusty B
    Date published: 2018-03-07

    Will this fit the 2004 gto 5.7 ls1 without changing the drive shaft? 

    Asked by: TwinTurboGTO
    If your car has a 4L60E already, this should be a direct swap.
    Answered by: Jon Jegs Tech
    Date published: 2018-02-09
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    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


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    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.