IronBox BMW E36 Solid Differential Mount Bushing Kit — Non-Compact

The IronBox BMW E36 Solid Differential Mount Bushing Kit replaces the compliant OEM rubber differential bushings with a three-piece solid duralumin set designed for drift, track, time attack, and motorsport use
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Solid bushings minimize differential movement under acceleration, engine braking, clutch kicks, and rapid load changes, creating a more direct drivetrain connection and keeping the differential consistently located during hard use
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The kit is compatible with the corresponding stock BMW E36 rear subframe and installs without modifying the subframe
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Main features
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• Solid differential mounting — replaces the flexible OEM rubber bushings and minimizes differential movement under load
• More direct drivetrain response — eliminates rubber deflection during acceleration, engine braking, clutch kicks, and rapid torque changes
• Stable differential position — helps maintain consistent driveline alignment during aggressive driving
• Stock-subframe installation — designed for installation in the corresponding standard BMW E36 rear subframe without modification
• Three-piece construction — replaces the differential mounting bushings with three machined solid components
• Anodized duralumin construction — provides high rigidity, strength, low weight, and corrosion protection
• Motorsport-focused design — intended for drift, track, time attack, and competition builds

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Compatibility
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• BMW E36 Sedan
• BMW E36 Coupe
• BMW E36 Touring
• BMW E36 Convertible
• BMW E36 M3 using the corresponding standard E36 rear subframe and differential mounting configuration

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Not compatible with
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• BMW E36 Compact and 318ti models
• BMW E30 or BMW Z3 semi-trailing-arm rear suspension

Vehicles with a custom rear subframe or non-standard differential mounting configuration unless confirmed before ordering
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The BMW E36 Compact uses a different rear suspension and subframe configuration and requires different differential mounting components
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Compatibility must be determined by the installed rear subframe and differential mounting configuration, not only by the vehicle model or engine
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Kit includes
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• Machined solid duralumin differential bushings — 3 pcs

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This listing is for the differential mounting bushings only and does not replace the separate rear subframe-to-body bushings

Installation information
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The original rubber differential bushings must be removed using suitable extraction or pressing equipment
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The rear subframe, differential mounting points, differential cover mounting ears, and chassis mounting areas must be inspected for cracks, deformation, corrosion, and previous repairs before installation
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Solid differential mounts can transfer higher loads into the rear subframe and mounting points, so reinforcement or repair may be required depending on the vehicle’s condition, power level, and intended use
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For hard drift or track use, consider combining this kit with the separate IronBox BMW E36 differential mount ear reinforcement product
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Differential alignment, mounting hardware condition, fastener torque, and driveline clearance must be checked during installation
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Installation by a qualified specialist is recommended