ZF 8HP70 8-Speed Automatic · Chrysler/Dodge/Jeep/RAM · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
2012–present Dodge Challenger/Charger (6.2L Hellcat/Scat Pack); 2012–present Jeep Grand Cherokee SRT/Trackhawk; 2014–present RAM 1500 (EcoDiesel/5.7L V8); heavy-duty ZF 8HP
| Configuration | 8-speed automatic — heavy-duty ZF 8HP variant |
|---|---|
| Gear Ratios | 1st 4.71:1 · 2nd 3.14:1 · 3rd 2.11:1 · 4th 1.67:1 · 5th 1.29:1 · 6th 1.00:1 · 7th 0.84:1 · 8th 0.67:1 · Rev 3.30:1 |
| Fluid Type | Mopar ZF+8 ATF |
| Fluid Capacity | 10.5 qts total, 6.0 qts service refill |
The 8HP70 in Hellcat applications sees extreme TCC loads. TCC wear under repeated hard launches and high-speed runs is more aggressive than in lighter applications.
Symptoms: Shudder at all speeds; TCC slip under hard acceleration; shudder doesn't resolve with just fluid change
High-torque performance applications accelerate solenoid wear.
Symptoms: Erratic shifts under hard use; P-codes; limp mode
Repeated high-torque launches destroy the factory TCC in extreme applications.
Symptoms: Shudder under launch; no TCC engagement; transmission slipping under boost or N/A power
Full disassembly. Performance TCC replacement (Raybestos or Alto high-performance unit). Solenoid set replaced. All clutch packs replaced with performance-spec Alto kits. ZF-spec soft parts. ZF+8 fluid flush.
ZF+8 fluid every 30,000 miles on performance applications (Hellcat, Trackhawk). Regular Challenger/RAM applications: every 40,000 miles. Performance driving shortens fluid life significantly.
Yes — Hellcat applications put extreme loads on the TCC. A fluid flush helps maintenance shudder, but track-driven Hellcats often need TCC replacement. We install performance-grade TCC units for sustained high-power use.
At factory power it's adequate. For supercharger pulls or drag racing, the factory TCC is a wear item. A performance rebuild with upgraded TCC handles the power reliably.
Mopar ZF+8 ATF. Critical for this application.
$2,400–3,200 stock; $3,000–4,000 for performance Hellcat/Trackhawk builds.
2–3 days. Performance builds: 3–4 days.
Free diagnostic, written estimate, lifetime warranty. Chicago's 8HP70 rebuild specialists since 1987.
