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    M159 SLS TCU Upgrade


    Availability: In stock


    M159 SLS TCU Upgrade

    Greatly Improved Shifting

    The Weistec Engineering SLS TCU Upgrade for the SLS, SLS Roadster, and SLS GT will match your transmission’s performance to that of the SLS Black Series.  Shifting up and down in gears will be quicker and firmer.  The improved shifting also allows for greater torque capacity which is ideal for modified vehicles that make significantly more power than stock.

    Tuning Process: How do I get my ECU/TCU tuned?

    Key Features:

    • Faster Shifting

    • Firmer Shifting

    • Improved Street and Track Performance

    • Increased Torque Capacity

    PDF Fileweistec_w197_sls_roadster_tcu_removal_manual (238.4 KB)Download
    PDF Fileweistec_w197_sls_tcu_removal_manual (302.2 KB)Download


    This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.
    Some Weistec Engineering performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). For state specific details please visit the following website.
    It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.
    All performance modifications and installations are at the customer’s own risk. Weistec Engineering holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.


    WARNING: Cancer and Reproductive Harm