Product Specification

TRQ RCTN ARM ASSY, FRGD, SDU-F For Tesla Model X/Model S (-2021) | 1052783-00-C

1. Core Function Description

1. Torque Reaction Redirection: It acts as a key "torque buffer" between the SDU-F and the chassis, efficiently redirecting the rotational torque generated by the front drive unit during acceleration, deceleration, and regenerative braking. This prevents excessive stress on the SDU-F mounting bolts, drive shafts, and high-voltage wiring harnesses—reducing the risk of premature wear or failure.
2. SDU-F Structural Stabilization: Adopting a "FRGD (Front Right/Left Guidance Design)" optimized for Tesla’s front drive layout, the assembly uses a 3-point reinforced anchoring structure to lock the SDU-F in its factory position. This avoids lateral or angular displacement of the drive unit during sharp turns or uneven road conditions, ensuring precise alignment of the drive shaft and minimizing power loss.
3. Vibration Damping & Noise Reduction: Integrated with a high-performance polyurethane damping bushing (tuned to SDU-F’s vibration frequency range of 15-400Hz), it absorbs over 82% of high-frequency torque vibrations. This significantly reduces "hum" or "rattle" sounds transmitted from the front drive system to the cabin, restoring a quiet driving experience.
4. 

2. Specification Parameter Table

3. Fault Judgment (Signs for Replacement)

• Front Chassis Noise: A persistent "metallic rattle" or "low-frequency hum" from the front end during acceleration (especially at 40-80km/h) or when releasing the accelerator—caused by worn damping bushings or loose arm connections.
• Visible Damage: The main arm is bent, cracked, or has deformed mounting lugs; the damping bushing is split, hardened, or detached from the arm—resulting in loss of torque redirection and stabilization functions.
• SDU-F Misalignment: Uneven front tire wear (e.g., faster wear on one side), or a "vibration" in the steering wheel during acceleration—triggered by arm deformation that shifts the SDU-F out of alignment.
• Loose Fasteners: Bolts securing the assembly to the SDU-F or chassis repeatedly loosen (even after re-tightening), signaling worn mounting holes or degraded structural integrity of the arm.

4. Advantages of Premium Brand-Grade (vs. Generic Products)

5. Installation Details

5.1 Package Contents

• 1× TRQ RCTN ARM ASSY (1052783-00-C)
• 3× High-tensile mounting bolts (Tesla OE-spec M10×1.5, pre-coated with anti-seize compound)
• 1× Torque specification card (recommended torque: 42±2Nm for SDU-F bolts, 38±2Nm for chassis bolts)
• 1× Installation guide (with step-by-step diagrams for FRGD-aligned positioning)

5.2 Installation Tools Required

• Torque wrench (0-200Nm range)
• Socket set (13mm, 16mm)
• Hydraulic jack + jack stands (to support SDU-F during installation)
• Wire brush + degreaser (to clean mounting surfaces)

5.3 Installation Precautions

1. Safety First: Secure the front SDU-F with a hydraulic jack before removing the old assembly to prevent drive unit sagging and damage to connected components.
2. Disassembly Order: Remove chassis bolts first, then SDU-F bolts—avoid forcing the arm to prevent bending adjacent parts.
3. Alignment Check: Ensure the new assembly’s FRGD marks align with chassis reference points to maintain SDU-F positioning.
4. Torque Control: Use a calibrated torque wrench to avoid over-tightening (risk of bushing damage) or under-tightening (risk of loosening).

6. After-Sales Support

• Warranty: 3-year/60,000-kilometer coverage (whichever comes first) for defects like arm cracking or bushing failure (non-human damage).
• Technical Assistance: Dedicated EV technicians available via chat/email to assist with installation alignment or post-installation troubleshooting.
• Compatibility Guarantee: 7-day no-reason return if incompatible with your Model X/S (up to 2021 with SDU-F), provided unused and in original packaging.

7. Conversion Guidance