{
  "dataset": "worst-transmissions-2005-2025",
  "title": "Worst Transmissions 2005–2025",
  "description": "Curated problematic transmission families (DCT, CVT, and conventional automatics with documented defect patterns), ranked by total NHTSA owner complaints across every vehicle that used the unit.",
  "methodology": "Families are the editorial set powering /transmissions/. NHTSA does not expose a standalone \"transmission\" complaint category — transmission complaints bucket under \"powertrain\" — so this dataset aggregates by curated family (matching year/make/model lists), not a category filter. Complaints are unverified consumer reports.",
  "license": {
    "name": "CC BY 4.0",
    "url": "https://creativecommons.org/licenses/by/4.0/",
    "attribution": "ProblemsByVin (https://problemsbyvin.com)",
    "source": "US NHTSA owner complaints + recalls (public record), MY 2005–2025"
  },
  "generated": "2026-05-31",
  "columns": [
    {
      "key": "family",
      "label": "transmission_family",
      "desc": "Transmission family name"
    },
    {
      "key": "manufacturer",
      "label": "manufacturer",
      "desc": "Manufacturer"
    },
    {
      "key": "type",
      "label": "type",
      "desc": "Transmission type"
    },
    {
      "key": "years_produced",
      "label": "years",
      "desc": "Production years"
    },
    {
      "key": "vehicles_in_db",
      "label": "modelyear_entries",
      "desc": "Matching model-year entries in DB"
    },
    {
      "key": "total_complaints",
      "label": "complaints",
      "desc": "Total NHTSA complaints across the family"
    },
    {
      "key": "complaints_per_modelyear",
      "label": "complaints_per_modelyear",
      "desc": "Complaints ÷ model-year entries"
    },
    {
      "key": "total_recalls",
      "label": "recalls",
      "desc": "Total recalls across the family"
    },
    {
      "key": "total_crashes",
      "label": "alleged_crashes",
      "desc": "Complaints alleging crash (unverified)"
    },
    {
      "key": "url",
      "label": "url",
      "desc": "Source page on ProblemsByVin"
    }
  ],
  "row_count": 10,
  "rows": [
    {
      "family": "Ford 6F35",
      "manufacturer": "Ford",
      "type": "6-speed transverse automatic",
      "years_produced": "2007-present",
      "vehicles_in_db": 61,
      "total_complaints": 30437,
      "complaints_per_modelyear": 499,
      "total_recalls": 112,
      "total_crashes": 32,
      "url": "https://problemsbyvin.com/transmissions/ford-6f35/"
    },
    {
      "family": "Chrysler 62TE 6-speed Automatic",
      "manufacturer": "Chrysler",
      "type": "6-speed transverse automatic",
      "years_produced": "2007-2017",
      "vehicles_in_db": 43,
      "total_complaints": 19608,
      "complaints_per_modelyear": 456,
      "total_recalls": 54,
      "total_crashes": 47,
      "url": "https://problemsbyvin.com/transmissions/chrysler-62te-6-speed/"
    },
    {
      "family": "Subaru Lineartronic CVT",
      "manufacturer": "Subaru",
      "type": "continuously variable transmission",
      "years_produced": "2010-present",
      "vehicles_in_db": 76,
      "total_complaints": 16642,
      "complaints_per_modelyear": 219,
      "total_recalls": 83,
      "total_crashes": 96,
      "url": "https://problemsbyvin.com/transmissions/subaru-lineartronic-cvt/"
    },
    {
      "family": "ZF 9HP 9-speed Automatic",
      "manufacturer": "ZF/Multiple OEMs",
      "type": "9-speed transverse automatic",
      "years_produced": "2013-present",
      "vehicles_in_db": 52,
      "total_complaints": 15553,
      "complaints_per_modelyear": 299.1,
      "total_recalls": 93,
      "total_crashes": 24,
      "url": "https://problemsbyvin.com/transmissions/zf-9hp-9-speed/"
    },
    {
      "family": "Jatco JF016E/JF017E CVT (Nissan)",
      "manufacturer": "Nissan",
      "type": "continuously variable transmission",
      "years_produced": "2013-2022",
      "vehicles_in_db": 59,
      "total_complaints": 14021,
      "complaints_per_modelyear": 237.6,
      "total_recalls": 73,
      "total_crashes": 85,
      "url": "https://problemsbyvin.com/transmissions/jatco-jf016e-jf017e-cvt/"
    },
    {
      "family": "GM 6L80/6L90 6-speed Automatic",
      "manufacturer": "General Motors",
      "type": "6-speed longitudinal automatic",
      "years_produced": "2006-present",
      "vehicles_in_db": 66,
      "total_complaints": 12820,
      "complaints_per_modelyear": 194.2,
      "total_recalls": 35,
      "total_crashes": 67,
      "url": "https://problemsbyvin.com/transmissions/gm-6l80-6l90-6-speed/"
    },
    {
      "family": "Ford DPS6 PowerShift",
      "manufacturer": "Ford",
      "type": "6-speed dual-clutch automated manual",
      "years_produced": "2011-2019",
      "vehicles_in_db": 16,
      "total_complaints": 9134,
      "complaints_per_modelyear": 570.9,
      "total_recalls": 18,
      "total_crashes": 11,
      "url": "https://problemsbyvin.com/transmissions/ford-dps6-powershift/"
    },
    {
      "family": "Honda 5-speed Automatic (B7XA/BAXA family)",
      "manufacturer": "Honda",
      "type": "5-speed transverse automatic",
      "years_produced": "2003-2010",
      "vehicles_in_db": 23,
      "total_complaints": 7165,
      "complaints_per_modelyear": 311.5,
      "total_recalls": 31,
      "total_crashes": 30,
      "url": "https://problemsbyvin.com/transmissions/honda-5-speed-b7xa-baxa/"
    },
    {
      "family": "Ram 68RFE / Aisin AS69RC",
      "manufacturer": "Ram",
      "type": "6-speed longitudinal automatic (heavy-duty diesel)",
      "years_produced": "2007-present",
      "vehicles_in_db": 53,
      "total_complaints": 5909,
      "complaints_per_modelyear": 111.5,
      "total_recalls": 57,
      "total_crashes": 38,
      "url": "https://problemsbyvin.com/transmissions/aisin-as69rc-68rfe-ram/"
    },
    {
      "family": "GM 8L90 8-speed Hydra-Matic",
      "manufacturer": "General Motors",
      "type": "8-speed longitudinal automatic",
      "years_produced": "2015-present",
      "vehicles_in_db": 37,
      "total_complaints": 4046,
      "complaints_per_modelyear": 109.4,
      "total_recalls": 26,
      "total_crashes": 43,
      "url": "https://problemsbyvin.com/transmissions/gm-8l90-8-speed/"
    }
  ]
}