10R60 Planetary 2025

If your Explorer, Aviator, Bronco or late Ranger has a 10-speed that howls with road speed, has lost a gear, or left bright steel on the pan magnet, the teardown usually ends at a gearset. This listing is a new, factory-boxed Ford planetary gear kit, part number L1MZ-7L192-A, for the 10R60. It is the Ford service part, not a used pull, and it is listed for 2025 builds, with the box marked for the 2021-2025 Explorer and Bronco and the 2024 Ranger.

What the planetary does in a 10R60

The 10R60 is the light-duty member of Ford's 10-speed family, rated at 443 lb-ft. Like the 10R80 and 10R140, it uses four simple planetary gearsets and six clutches in a one-piece case; the clutches hold or drive different members of those four sets, and the combinations give ten forward ratios and reverse. A planetary kit is a carrier with its pinion gears riding on needle bearings and pins. Because the four sets are tied together, one carrier is loaded in many gears, so a worn carrier can make noise across a wide speed range rather than in one gear only. The 10R60 shares the layout of the 10R80 but most internal parts are not interchangeable, which is why this kit carries its own L1MZ part number.

The photo shows the carrier assembly: pinion gears visible through the carrier windows and a toothed outer rim. Ford does not publish on its public parts pages which of the four positions this kit serves, so the part number match described below matters more than a visual comparison.

Symptoms of a worn 10R60 gearset

• Whine or howl that tracks road speed, not engine rpm, and changes as the unit moves through gears
• Loss of one or more gears, or no movement at all if a carrier or spline lets go
• Bright steel chips on the pan magnet, as opposed to the fine gray paste of normal wear or the friction material of a burnt clutch
• Gear ratio error codes such as P0731 through P0736 that return after a relearn, which can come from a slipping clutch or from a broken path through a gearset

Not every 10R60 complaint is a gearset. The harsh 7-6 downshift on 2022 units built on or before 9 August 2022 is a dislodged A clutch return spring snap ring (Ford TSB 22-2411), and harsh or delayed engagement is often the C-D-F drum sleeve. Both are separate repairs.

How to confirm before you buy

Drop the pan and read the debris first. A carrier failure leaves bright chunks or flakes; clutch damage leaves friction fiber. With the unit apart, spin each carrier by hand and feel for rough or notchy pinions, check pinion end play, and look for chipped teeth, a cracked carrier or twisted splines. Our 10-speed whine and clunk diagnosis guide walks through separating gear noise from pump whine, which is normal on the off-axis 10R pump. The 10R80 vs 10R60 comparison covers how to confirm which unit you actually have before ordering 10R60 parts.

Fitment

This kit is the Genuine Ford L1MZ-7L192-A. The listing is for 2025, and the box is marked for the 2021-2025 Explorer and Bronco and the 2024 Ranger with the 10R60. Ford has issued build-date-specific repairs for the 10R60, so do not order by vehicle model alone. Match L1MZ-7L192-A to the part number for your VIN, or send us your year and VIN before you order and we will check it. It does not fit the 10R80 or 10R140. You can browse other 10-speed hard parts on our hard parts page and see the common failures on the 10R60 problems and cost page.

Install notes

• Reaching the gearsets is a full teardown; the torque converter, valve body and fluid pump all come off first.
• Lay out every thrust washer and bearing in order as it comes out and inspect each one. Replace any that are scored, blued or flattened.
• Check pinion end play on the new kit and confirm it turns freely before it goes into the case.
• If a carrier came apart, the clutches and drums saw the debris. Inspect the 10R60 clutch drum and plan on fresh frictions such as the 10R60 clutch module.
• Clean or replace the cooler; metal left in the cooler goes straight back into the new gears.
• Fill with Motorcraft Mercon ULV only, check the level hot as the service procedure describes, and run the adaptive relearn after the rebuild.

What is Ford part number L1MZ-7L192-A?

Ford's catalog describes it as KIT - PLANETARY GEAR. It is a new factory service planetary carrier kit for the 10R60 ten-speed automatic.

Will this fit my 10R80 F-150 or Mustang?

No. The 10R60 and 10R80 share a layout, but most internal parts do not interchange. This kit is for the 10R60 used in the Explorer, Aviator, Bronco and 2024-up Ranger.

How do I know the gearset is the problem and not a clutch?

Look at the debris. Bright steel chips and a whine that follows road speed point to a gearset. Friction material and slipping or flaring shifts point to clutches. A teardown and a hand check of each carrier confirm it.

What should I replace with the planetary?

Any worn thrust washers and bearings, the frictions and seals in an overhaul kit, and the cooler or at least a thorough cooler flush, since metal from a failed carrier spreads through the unit.

What fluid does the 10R60 use?

Motorcraft Mercon ULV. Do not substitute Mercon LV or a multi-vehicle fluid.

Do I need to do a relearn after installing it?

Yes. After any internal repair, run the adaptive relearn with a capable scan tool and a drive cycle so the shift adapts reset to the repaired unit.

• 10R80 vs 10R60: Differences, Interchange, and Which Is Stronger
• 10-Speed Noise Diagnosis: Whine and Clunk
• Ford 10-Speed Transmission Guide
• 10-Speed Fluid Type and Capacity