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Jeep Grand Cherokee: ZF 8HP Torque Converter Shudder

ZF 8HP Torque Converter Shudder is a common transmission fault on the Jeep Grand Cherokee on the 2013–2021 cars, and we rate it major. Putting it right costs $350 to $4,800 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 31 documented faults on the Jeep Grand Cherokee.

Vehicle
Jeep Grand Cherokee
Engine
3.6L
Years
2013–2021
Fuel
petrol
Gearbox
auto
System
Transmission

This page covers the Jeep Grand Cherokee as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Jeep Grand Cherokee faults31 documented faults on this model

What you are looking at

A cutaway automatic transmission torque converter showing the internal turbine and stator.Example of the part — not this vehicle

A torque converter, sectioned. The lock-up clutch inside is what shudders.

No machine-readable author provided. BerndB~commonswiki assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons

What goes wrong

The ZF 8HP45/8HP70 8-speed automatic paired with the 3.6L Pentastar V6 in WK2 Grand Cherokees develops a characteristic torque converter clutch shudder between 60–100 km/h, felt as a low-frequency vibration during light throttle lock-up engagement. The issue is caused by torque converter clutch material glazing and contaminated or degraded ATF. A ZF-approved ATF flush with correct fluid often resolves early cases; advanced shudder requires torque converter replacement.

What you would notice

  • Low-frequency vibration or flutter felt through floor between 60–100 km/h
  • Shudder on light throttle application in top gears
  • Vibration disappears under hard acceleration or when coasting
  • Transmission hesitation when re-engaging lock-up after braking

How to check it

Where to look. Torque converter, inside transmission bell housing

  1. Test drive at 70–90 km/h on light throttle — shudder is typically felt in the seat pan and floor.

  2. Ask for transmission service history and whether ZF-approved fluid (ZF Lifeguard 8 or equivalent) has been used.

  3. Scan for transmission slip or shudder codes.

  4. Check transmission fluid colour.

Parts involved: Torque converter.

What it costs to put right

$350 to $4,800 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

  • “Has there been any vibration or shudder at highway speed on light throttle?”
  • “Has the transmission fluid been changed with correct ZF-approved fluid?”
  • “Has any transmission work been carried out?”

Now check the Jeep Grand Cherokee you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Jeep Grand Cherokee buyer questions

Is zf 8hp torque converter shudder serious on a Jeep Grand Cherokee?

We rate it major and common on the Jeep Grand Cherokee. The ZF 8HP45/8HP70 8-speed automatic paired with the 3.6L Pentastar V6 in WK2 Grand Cherokees develops a characteristic torque converter clutch shudder between 60–100 km/h, felt as a low-frequency vibration during light throttle lock-up engagement. The issue is caused by torque converter clutch material glazing and contaminated or degraded ATF. A ZF-approved ATF flush with correct fluid often resolves early cases; advanced shudder requires torque converter replacement.

How much does it cost to fix on a Jeep Grand Cherokee?

$350 to $4,800 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Jeep Grand Cherokee years are affected?

Our research records this fault on the 2013–2021 Jeep Grand Cherokee. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Test drive at 70–90 km/h on light throttle — shudder is typically felt in the seat pan and floor. Ask for transmission service history and whether ZF-approved fluid (ZF Lifeguard 8 or equivalent) has been used. Scan for transmission slip or shudder codes. Check transmission fluid colour. Look here: Torque converter, inside transmission bell housing