Complete oil pump drive gear set, part 188711D, for the Ford 10R80 and GM 10L90 ten-speed, for replacing worn or chipped pump drive gears.
If your 2017-or-newer F-150, Expedition, Mustang, Ranger or Bronco with the 10R80 has started dropping metal into the pan, engages slowly out of Park, or the teardown turned up chipped teeth at the front of the case, this is the part you are looking for. It is a complete three-piece oil pump drive gear set sold under part number 188711D: the converter drive gear, the idler gear with its pressed-in ball bearing, and the splined driven gear that turns the pump. Buying the three gears as a set lets you rebuild the pump drive without paying for a whole front support assembly.
Older Ford automatics bolted the pump directly over the torque converter hub. The 10R80 does not. Its pump sits off to the side, and the converter hub turns a drive gear that meshes with an idler, which in turn spins the pump's driven gear. Ford cut these gears straight rather than helical, so a certain amount of gear whine is part of how the unit sounds from the factory. Everything the transmission does depends on this gear train: line pressure for six clutches, feed to the solenoids, converter charge and the cooler and lube circuits. A tooth that chips or a bearing that loosens cuts pump output across every gear at once.
Do not condemn the gears on noise alone. ATRA's GEARS Magazine points out that Ford considers a converter-type whine from these straight-cut gears normal. What separates normal from failing is debris: pull the pan and look at the magnet and filter screen before ordering. Hard chunks of gear tooth or a sudden jump in metal say the drive gears are coming apart. A line pressure test and a scan for slip codes help rule out the valve body and clutch packs, which cause similar complaints. Our pump failure symptoms and replacement guide walks through the pressure checks, and the valve body symptoms guide covers what a sticking regulator valve looks like by comparison.
This set is listed for the Ford 10R80 used in 2017-up F-150, Expedition, Navigator, Mustang, Ranger and Bronco, and is also cross-listed for the GM 10L90. Be careful with that cross-reference. Transmission Digest reported that GM uses helical gears in its front cover while Ford uses straight-cut gears, and the two styles will not mesh with each other. Lay the new set beside the gears you remove and compare tooth angle, the spline count on the driven gear and the bearing size in the idler before you build anything. Match the tag on the transmission case, not just the vehicle year, because ten-speeds get swapped between trucks. If you are not sure, send us the year and VIN before ordering. You can browse other ten-speed parts on our 10-speed collection page, and the GM-side listing is our 10L90 pump drive gear set.
The gear set is serviced with the transmission out of the vehicle and the front support assembly off the case. Inspect the pump pocket, the pump body and the converter hub surface before installing the new gears; scoring in the pump bore will keep pressure low no matter how good the gears are. Press the idler on squarely and confirm it does not spin on its bearing race. Because broken gear teeth travel through the whole hydraulic system, flush the cooler and lines, replace the filter, and check the valve body for embedded debris. Refill with a full synthetic Mercon ULV fluid such as the Valvoline ULV case for the 10R80, then set the level hot with the engine running. If the unit is coming apart anyway, a ten-speed overhaul kit supplies the seals and gaskets you will disturb, and our cooler line replacement guide covers flushing. After the job, clear adaptive values and let the TCM relearn shifts on a road test.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for the 10R80 ten-speed used in 2017-up F-150s, along with the Expedition, Navigator, Mustang, Ranger and Bronco. Confirm the transmission tag on your case and compare the old gears to the new ones before installing, or send us your year and VIN.
Not automatically. Transmission Digest found that GM front covers use helical gears and Ford uses straight-cut gears, and they do not mesh with each other. Compare the tooth form on your old gears to this set before using it in a GM unit.
Not by itself. Ford treats a converter-type whine from the straight-cut pump gears as normal. Check the pan magnet and filter for gear debris and do a line pressure test before replacing the gears.
Replace the filter, flush the cooler and lines to remove gear fragments, inspect the pump body and converter hub, and replace any seals you disturb. If debris reached the valve body, clean or service it before reassembly.
The 10R80 uses Mercon ULV full synthetic fluid. Set the level hot with the engine running, then clear adaptives and let the transmission relearn shifts.
