ZF 8HP45 8-Speed Automatic · Chrysler/Dodge/Jeep/RAM · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
2012–present Jeep Grand Cherokee (3.6L Pentastar); 2012–present Dodge Durango (3.6L); 2012–2020 Dodge Challenger/Charger (3.6L/5.7L); lighter-duty ZF 8HP platform
| Configuration | 8-speed automatic — ZF design licensed to Chrysler/FCA |
|---|---|
| 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 (ZF LifeGuardFluid 8 spec) |
| Fluid Capacity | 9.5 qts total, 5.0 qts service refill |
ZF 8HP torque converter shudder at 40–60 mph under light throttle is the most common complaint across all 8HP applications. Fluid-related in most cases.
Symptoms: Shudder at 40–60 mph under light throttle; clears at full throttle; worse in warm weather
Valve body solenoid wear at high mileage causes erratic gear selection and limp mode.
Symptoms: Missed gears; erratic shift counts; P-codes; limp mode
The mechatronic sleeve (integrated control unit) develops seal leaks at the case interface.
Symptoms: ATF leak at mechatronic area; electrical faults from fluid contamination
Full disassembly. Torque converter replaced or TCC serviced. Valve body solenoid set replaced. Mechatronic seal replaced. All clutch packs replaced. ZF-spec soft parts throughout. Converter flushed with ZF+8 fluid.
ZF LifeGuardFluid 8 every 40,000 miles. The ZF 8HP has an excellent reputation for durability — TCC shudder from degraded fluid is almost always resolved by a fluid change before mechanical repair is needed.
Same ZF design, different software calibration and connector configurations. Core mechanical components are shared across all 8HP applications.
Start with ZF LifeGuardFluid 8 flush — this resolves the majority of 8HP shudder cases. If shudder persists after 500 miles on fresh fluid, the torque converter TCC is worn.
Mopar ZF+8 ATF (ZF LifeGuardFluid 8 specification). Do not use Dexron or Mercon.
2–3 days.
$2,200–3,000.
Free diagnostic, written estimate, lifetime warranty. Chicago's 8HP45 rebuild specialists since 1987.
