
The ZF 8HP90 handles Hellcat torque but generates significant heat during launch control, track shifts, and towing on Durango SRT. Fluid degrades over time — harsh shifts, flare, or clutch slip can follow neglected service.

Use correct ZF Lifeguard fluid spec. Record service date — many owners pair trans service with diff fluid and brake fluid flush.

Brake fluid absorbs moisture and should be flushed every 2–3 years on track-used SRT cars. Pair trans and brake service in the same maintenance window.
Learn more in our Hellcat rotors and brakes guide.
Upgrade Hellcat brakes when trans service reminds you how hard you drive.
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