Transmission problems, ranked by the people who filed them
The transmission is the most expensive thing that routinely fails on a used car — a bad CVT, a slipping automatic, or a dead dual-clutch is a $3,000–$7,000 bill. This is which ones actually fail, how they fail, and what to check before you buy. Sourced from NHTSA owner complaints, not opinion.
Shopping a car with a CVT? CVT reliability — which fail and which don’t. Part of the full known engine & transmission defects reference · see also when these failures tend to hit.
The transmissions that fail most
Curated families with widespread, documented defect patterns — class actions, NHTSA investigations, or repeated failures across the affected fleet — ranked by total owner complaints. This is the transmission half of our where-the-failures-cluster analysis. Click any family for every model and year affected.
CVT vs. dual-clutch vs. conventional automatic
Fixed gears, a torque converter, decades of refinement. The lowest-risk of the three when maintained. Failures are usually neglect (burnt fluid), heat, or a specific bad design (e.g. the 6F35, the 62TE). Buy with: fluid-service records.
Nissan/Jatco and Subaru Lineartronic. Smooth and efficient until the fluid degrades and the belt slips the pulleys — shudder around 30–50 mph, then it grenades, often 60k–130k. Buy with: documented fluid service; test for shudder off the line. Ignore any "sealed for life" claim.
Two automated clutches. Dry DCTs (Ford PowerShift) made cars undrivable and drew class actions; wet DCTs (VW DSG) are sturdier but need scheduled fluid service. Low-speed shudder can be normal behavior — not always failure. Buy with: service history, a careful low-speed test drive.
The exception. Toyota/Ford-style planetary "eCVTs" have no belt and no clutch packs — just gears and motors. Among the most durable transmissions on the road. Don't confuse these with belt CVTs.
Worst vehicles for transmission & driveline complaints Top 20 by complaint volume
Deep dives: how these actually fail
Shop-voice breakdowns of the specific transmissions above — the failure modes, the model years, and what to do about it.
- Ford 6F35 (Escape) — the worst single platform
- Nissan Jatco CVT (Altima)
- Chrysler 62TE (Grand Caravan)
- Pacifica 9-speed vs. hybrid eCVT
- Subaru Lineartronic CVT (Outback)
- Subaru CVT (Forester)
- VW DSG dual-clutch (GTI)
- Kia IVT — the "sealed for life" myth
- The radiator-into-transmission killer
- Colorado — the 8-speed myth, debunked
Failure-mode deep-dive: CVT transmission failure — the shudder-then-grenade pattern, which platforms it hits, and what to check before you buy.
Original research: the Ford transmission nobody recalled — how the 6F35 took four times the PowerShift’s NHTSA complaints at a comparable per-car failure rate, and got a software flash instead of a recall.
Common questions
Which transmissions are the most problematic?
By aggregated NHTSA owner complaints, the Ford 6F35 leads, followed by the Chrysler 62TE, Subaru Lineartronic CVT, and the Jatco CVT used by Nissan. The full ranking of 10 documented-defect transmission families is below.
Are CVT transmissions reliable?
Not all CVTs are equal. Belt-and-pulley CVTs (Nissan/Jatco, Subaru Lineartronic) have the worst documented failure record — shudder, overheating, then replacement, often between 60,000 and 130,000 miles. Planetary "eCVTs" in hybrids (Toyota/Ford-style) are a different, far more durable design.
How much does a transmission replacement cost?
Across the powertrain complaint category, repair estimates average around $2,500. A full automatic or CVT replacement commonly runs $3,000–$7,000; a dual-clutch can be similar once clutch packs and the mechatronic unit are involved.
Is a dual-clutch transmission as bad as a CVT?
They fail differently. Dry dual-clutches (Ford PowerShift) made cars undrivable and drew class actions. Wet dual-clutches (VW DSG) are more durable but still need scheduled fluid service. Conventional torque-converter automatics remain the lowest-risk of the three.