Drivetrain› Automatic Transmissions and Components

RENNtech

722.6 Transmission Upgrade

$3,690.00

SKU: Trans:27.722.6.V12

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The RENNtech 722.6 transmission upgrade is a mechanical enhancement for the Mercedes-Benz 722.6 five-speed transmission.

This upgrade involves a complete disassembly and inspection of the transmission, followed by a mechanical upgrade to the clutch packs to maximize friction materials and power transmission. New gaskets, seals, o-rings, and a transmission pan filter are included during reassembly. The upgrade offers improved shift response, timing, increased torque handling, and greater drivability without sacrificing comfort.
Show original supplier description
The RENNtech Performance Transmission Upgrade is a mechanical enhancement designed for the Mercedes-Benz 722.6 five-speed transmission, particularly for V12 engines, when increased engine performance necessitates an improved driveline. This upgrade involves a comprehensive process including complete transmission disassembly, thorough inspection, and a mechanical upgrade to the transmission's clutch packs. This modification maximizes the amount of friction materials within the transmission, thereby increasing the power that can be transmitted through each forward gear. The final assembly includes all new gaskets, seals, o-rings, and a new transmission pan filter. Key features and benefits of this upgrade include the ability to maximize friction materials, increased torque handling capabilities, improved vehicle responsiveness, and enhanced engine performance. Drivers will experience improved shift response, optimized shift timing, and greater drivability under extreme conditions, all while maintaining around-town comfort. **Important Attention:** RennTech Transmission Upgrades can only be performed at the RennTech HQ in Stuart, FL. The removal, upgrade, and installation must all be performed in-house. This product is specifically designed for the following vehicles: 2007-2011 Mercedes-Benz R230 SL 600.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandRENNtech
Part NumberTrans:27.722.6.V12
CategoryDrivetrain
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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