do88 BMW M2/M3/M4 (G80/G81/G82/G83/G87) Transmission Cooler

The ZF 8HP automatic gearbox behind the S58 is genuinely robust and fast, designed to handle the engine's high power output. But adding performance parts and tuning on top of that can overwhelm the original cooling system, especially during track driving, and an overheating transmission means slower gear changes at best, and potential transmission damage at worst.

do88's engineers redesigned the transmission cooler's core specifically to address this, increasing core volume by 71% and active cooling surface area by 50% compared to the factory unit, while maintaining similar oil pressures. Harmonica tubes with internal channels ensure optimal oil flow and maximum surface contact, and the dual-pass design keeps fluid in the cooler for longer, allowing genuinely more heat to dissipate before it re-enters the system. Total oil volume increases by 42% (8.5dl versus 6dl stock), a real capacity buffer alongside the improved cooling efficiency.

Works with: OEM-style quick-connect inlet/outlet connections. Genuine drop-in fit, no modifications required.

Why Choose This Transmission Cooler

• 71% larger core volume and 50% more active cooling surface area than the factory unit
• 42% more oil volume (8.5dl vs 6dl stock) for genuine capacity buffer
• Harmonica tubes with internal channels for optimal oil flow and surface contact
• Dual-pass design, fluid stays in the cooler longer for more heat dissipation
• OEM-style quick-connect fittings, genuine drop-in fit with no modifications
• Maintains similar oil pressures to stock despite the substantial capacity increase

Compatibility

• BMW G87 M2 (S58, 2023+)
• BMW G80/G81 M3/M3 Competition/M3 CS (S58, 2020+)
• BMW G82/G83 M4/M4 Competition/M4 CSL (S58, 2020+)