The Fonzon FZCSZ650 is a fully assembled 50T centre differential upgrade for compatible ARRMA 6S vehicles, using a 7075-T6 aluminium case and strengthened metal gearing to improve drivetrain durability under high-power use. The differential combines CNC-machined nickel-chromium alloy steel components with powder-metallurgy drive bevel, planetary and ring gears for smooth, consistent power transfer. It is supplied factory assembled and pre-filled with 10K cSt silicone oil, making it ready for installation with minimal preparation. Features 50T Centre Differential: Designed for compatible ARRMA 6S drivetrain applications 7075-T6 Aluminium Case: Provides a rigid, lightweight differential housing CNC-Machined Steel Components: Nickel-chromium alloy steel parts improve drivetrain strength Powder-Metallurgy Gearing: Drive bevel, planetary and ring gears are built for demanding use 10K cSt Factory Fill: Supplied pre-filled with silicone differential oil Extended Drive Cup: Nickel-chromium alloy steel drive cup features an additional 1.5mm of length Sealed Bearings: High-quality adapter cup bearings support smooth operation Grade 12.9 Hardware: Titanium-coated screws provide strength and corrosion resistance Factory Assembled: Supplied fully assembled and ready to install ARRMA 6S Application: Intended for compatible ARRMA 6S vehicles using a 50T centre differential configuration Specifications Brand: Fonzon Manufacturer Part Number: FZCSZ650 Product Type: Assembled Centre Differential Application: Compatible ARRMA 6S Vehicles Main Gear: 50T Differential Case Material: 7075-T6 Aluminium Gear Material: Steel and Powder Metallurgy Steel Components: Nickel-Chromium Alloy Steel Differential Oil: 10K cSt Silicone Oil Drive Cup: Extended +1.5mm Nickel-Chromium Alloy Steel Bearings: Sealed Adapter Cup Bearings Hardware: Grade 12.9 Titanium-Coated Screws Assembly: Factory Assembled Includes 1 × Fonzon FZCSZ650 50T ARRMA 6S Centre Differential Assembly FAQ Is the Fonzon FZCSZ650 supplied assembled? Yes. The FZCSZ650 is factory assembled with its internal gears, drive cups, bearings and hardware installed. Does the FZCSZ650 already contain differential oil? Yes. The differential is supplied pre-filled with 10K cSt silicone oil. Will the FZCSZ650 fit every ARRMA 6S model? Not necessarily. The FZCSZ650 is intended for compatible ARRMA 6S vehicles using a 50T centre differential, so OZRC recommends confirming the centre differential specification for your exact model and revision before ordering. Why use a 7075-T6 aluminium differential case? The aluminium case provides greater rigidity than a typical composite housing, helping maintain gear alignment when the drivetrain is under high load. Important Notes Confirm that your ARRMA 6S model uses a compatible 50T centre differential before purchase Do not assume compatibility with every ARRMA 6S model or model revision Differential is supplied pre-filled with 10K cSt silicone oil Check centre gear and motor pinion mesh carefully after installation Incorrect gear mesh can cause excessive noise, heat and premature gear wear Rotate the drivetrain by hand after installation to confirm smooth operation before applying power
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