• HOURS of Operation

    Open Monday - Friday 9A-4:30P EST

    QUESTIONS? GIVE US A CALL! 1 (765) 378-4908

    We're closed on major holidays.

    Closed May 24th. No phone or email services during this time.

  • Standard order lead time for STANDALONE WIRING HARNESSES is estimated to be 9-11 weeks from date of purchase.

    Need is sooner? Give us a call to discuss expediting. Limited slots available.

    All other items typically ship within 3-5 business days unless specified otherwise.

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LS and LT Retrofit Specialists
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4L60E to 4L80E Upgrade Harness

4L60E to 4L80E Upgrade Harness

Choose your options:
4L80E Upgrade
Vehicle Application(required):
Product Code: 60to80Upgrade
Usually Ships in 24 to 72 Hours
If switching from a 4L60E to a 4L80E transmission, this is the adapter harness needed for correct operation of the new transmission. Includes adapter and ISS (input speed sensor) harness. ECM reprogramming required for proper operation.

If you're just needing the ISS pigtail only, please call us at 765-378-4908 to order.