u/NectarineOwn8812

Been around these long enough to have an opinion, but I went and pulled the actual NHTSA owner-complaint numbers to check myself, and the result surprised me.

The DPS6 PowerShift gets all the airtime — the class action, the buybacks, Ford abandoning dry dual-clutches. Deserved. ~8,500 owner complaints.

The 6F35 — the regular 6-speed auto in Escapes, Fusions, MKZs from 2009 on — has 37,679. About 4x the PowerShift. It's the single most-complained-about engine or transmission platform I could find in the whole NHTSA set.

Here's the part that gets me: on a per-model-year basis they fail at almost the same rate (~530 vs ~600 complaints per model-year). The difference is how.

The PowerShift made cars undrivable — shudder at takeoff, won't engage, dangerous. Owners couldn't ignore it, lawyers couldn't either. The 6F35 fails slowly: torque-converter shudder around 60k, "that's normal" from the dealer, then ~$4k at 90k and the owner blames themselves for not servicing it enough.

Dramatic failures get class actions. Slow durability failures get a TSB and an expired warranty. The 6F35 got Customer Satisfaction Program 20B27 (a software flash for torque-converter overheating) and 15 years of the same complaints with no recall. A new class action was actually filed March 2024 in Michigan specifically because one was never issued.

Not a "Ford bad" post — I work on these. Just think the 6F35 deserves the reputation the PowerShift has, and used buyers have no idea because it never made headlines.

Anyone here actually gotten one fixed permanently, or is it reman-or-live-with-it? Curious what model years people have had the best/worst luck with.

This is a weird hobby, bear with me. i run a moving company outside Dallas and i fix our box trucks and vans on the weekends. couple years ago i started

keeping a list of which used ones turned into money pits so i'd stop buying the same mistakes.

then i realized NHTSA already keeps that list. every owner complaint and recall going back decades, just sitting in a government database nobody reads. so i

pulled the whole thing. 16,825 model-years, 768k complaints, 2005 to 2025.

the part that got me: 28 specific engine/transmission families account for almost 40% of every complaint filed, while being only 7% of the vehicles. stuff like the Hyundai Theta II, the Ford 6F35 auto, the PowerShift, the GM 5.3 with the lifter problem, the Subaru CVTs.

The one that surprised me most: the Ford 6F35 transmission has 37,000+ complaints and never got a recall. the PowerShift everyone complains about online has 8,000 and got a class action. same failure rate per car, ford just hid the slow one better.

If you give me a year and model i'll tell you if it's on the list and what it actually fails from.

Spent the last few months pulling NHTSA's complaint and recall data

for every US-market vehicle 2005-2025 and aggregating it by engine

and transmission family. The concentration is more extreme than I

expected.

7.1% of vehicles in the database account for 38.5% of NHTSA owner

complaints. 28 platforms — engines and transmissions with documented

systemic defects — account for 295,560 of 768,293 total complaints.

The Ford 6F35 transmission alone has 37,679 complaints across 63

vehicle model-years. Theta II 2.4L is #2. GM 3.6 LFX/LLT V6 is #3.

Full ranked table and methodology in the writeup.

NHTSA's data is public and reproducible. Methodology and limitations

are spelled out. Curious what others' read is on the patterns.

Link to research