Also known as: 6r140, 6r 140, torqshift 6, 6-speed torqshift, ford heavy-duty 6-speed
Ford's heavy-duty six-speed automatic, introduced for 2011 behind the 6.7 Power Stroke and carried through the Super Duty range until the ten-speed took over for 2020.
It is a clean-sheet design rather than a developed 5R110W, which is the thing most worth knowing when sourcing parts: the five-speed TorqShift it replaced shares very little with it. Ford kept the TorqShift name across both, and that name alone will not tell you which gearbox a truck has — the gear count will.
Its input rating is quoted at 1,400 lb-ft and that figure is routinely misread. It is the torque at the gearbox input, after multiplication through the converter — it is not a 1,400 lb-ft engine rating, and treating it as headroom for a tune is how these are broken.
The ratios run 3.974, 2.318, 1.516, 1.149, 0.858 and 0.674, which is the part that gives the truck its character: two overdrives, so sixth is a genuine cruising gear rather than a tall top. Reverse is 3.12. It is a one-piece aluminium case weighing around 325 lb dry, and it carries a live-drive power take-off provision and low-speed converter lockup — both features aimed squarely at towing rather than at economy.
It takes MERCON LV, and on a truck that works the filtration system is the maintenance item that actually matters: this unit was given a high-capacity filter because the duty cycle demands it.
Cars fitted with this gearbox
2 generations. Only where a source names the model and the generation together — a gearbox is documented as a product far more often than as a fitment, so this list is deliberately shorter than the truth.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about 6R140.