Description:
RennTech increased engine performance it becomes necessary to further improve the drive line components, most importantly the transmission in order to ensure maximum power is transmitted to the drive wheels without transmission slippage. This can not be realized with software and only truly be accomplished by an internal mechanical upgrade to the transmission hardware. RennTech is the foremost authority on transmission upgrades and has done countless rebuild and upgrades for the most demanding dealers and clients for over 21 years.
With increased engine performance it becomes necessary to further improve the drive line components, most importantly the transmission in order to ensure maximum power is transmitted to the drive wheels without transmission slippage.
The RennTech transmission upgrade is complete transmission software upgrade and has to be done at the RennTech HQ in Stuart, Florida. RennTech upgrade leads to improved shift response, shift timing, increased torque handling capabilities and greater drivability under extreme conditions without sacrificing around town comfort. The transmission upgrade also drastically improves 0-60 times.
Attention:
For the RennTech Transmission Upgrade on the C217 and W222 S-Class, the vehicle has to be present at the RennTech HQ in Stuart, FL
Features:
- Ability to maximize the amount of friction materials
- Increased torque handling capabilities
- Improves vehicles responsivenessÂ
- Increased engine performance
- High quality material used
- Improved shift response
- Improved performance
- Greater drivability
- Shift timing
Vehicle Fitment:Â Â
- 2016Â Mercedes-Benz X166 GLS 63 AMG Biturbo
- 2017Â Mercedes-Benz X166 GLS 63 AMG Biturbo
- 2018Â Mercedes-Benz X166 GLS 63 AMG Biturbo
- 2019 Mercedes-Benz X166 GLS 63 AMG Biturbo
- 2020 Mercedes-Benz X166 GLS 63 AMG Biturbo
Note:
Images are for representation purpose only and may differ depending on application.
⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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Avoid the headache of the wrong part. If you are unsure about compatibility, contact us first. If we verify the fitment for your vehicle via email and it doesn’t fit, we will handle the exchange at no cost to you.
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We offer FREE Ground Shipping within the 48 contiguous United States. Most in-stock orders process within 48 hours. For your security, high-value performance parts require a signature upon delivery to ensure they reach you safely.
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Please inspect your order immediately. Damage must be reported within 48 hours. For freight/LTL items, if you cannot inspect the contents immediately, please write "Subject to Inspection" on the delivery receipt before signing.
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Flexible Returns:
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Unused items in brand-new, original packaging can be returned within 30 days. While standard refunds incur a 25% restocking fee, we will waive this fee entirely if you choose store credit or an exchange for your next upgrade.
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Exclusions:
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To ensure every customer receives brand-new, untampered components, parts that have been installed, modified, or used are non-returnable. Custom builds, special orders, and wheel/tire packages are considered final sale.
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