6R140 Banner Rebuild Kit 2015, new and ready to install. Fits the 6R140. Ships fast from the USA.
Running a 2015 or newer Ford Super Duty with the 6R140 TorqShift that now slips in gear, bangs into Drive, flares on the 2-3 or 5-6 shift, or cooks its fluid every time it tows? Once the clutches are worn, the fix is an overhaul, and this banner kit packages the parts for one. It is listed for 2015 and later 6R140 units behind the 6.7L Power Stroke and the gas V8s in the F-250, F-350, F-450 and F-550, and it includes the overhaul gasket and seal kit, friction clutches, the 2015-up piston kit, a filter and a Sonnax Zip Kit.
Inside the case, five clutches do all the work: A and B drive the gearset, C holds for 2nd and 6th, D holds low and reverse, and E applies in 4th through 6th. A shift is a timed handoff from one clutch to the next, controlled by solenoid pressure. When friction material glazes or a piston seal leaks, that handoff slips and the computer piles on more pressure until shifts turn harsh or the unit sets a ratio fault. This kit replaces every friction and seal in those circuits, swaps in new pistons matched to the 2015-up design, and adds valve body parts that close worn bores in the main line, solenoid regulator, clutch control and converter clutch circuits.
A 2015 F-250 written up by Transmission Digest had no engagement cold, and the cause turned out to be an undersized O-ring on a new filter neck, not burned clutches. Check that first. Verify the hot fluid level, then put a gauge on line pressure; Sonnax gives a 90 to 260 psi range. Low pressure everywhere points to the pump or filter seal, while one slipping range with good pressure points to that clutch. Our 6R140 pump failure guide and delayed engagement guide walk through both checks.
The listing covers 2015 and later 6R140 transmissions, gas and diesel. Sonnax notes that Ford's 2015 production brought a major change to the valve body worm tracks, with castings ending in BA used through 2019 and four different separator plates seen in that run. Later diesels also changed: on 2017 and newer diesel trucks the cold-lube thermostat moved out of the valve body to the cooler. Those changes are why this kit is not the same as the 2011-2014 banner kit. If your truck was built near the start of the 2015 model year, or you are not sure what is in it, send us the year and VIN and we will check fitment. Every 6R140 part we carry is on the 6R140 collection page.
| Fits | 6R140 2015 |
| Part type | Banner Rebuild Kit |
| Condition | New |
| Brand | Sonnax |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 2015 and later 6R140 transmissions, gas and diesel. Trucks from 2011 through 2014 use the earlier version of this kit because the pistons and valve body changed for 2015.
The listing states it covers both gas and diesel 2015-up units. Diesel trucks from 2017 on did get some valve body changes, so if you want a second check, send us your year and VIN.
Plan on steel plates if yours are heat marked, bushings, Mercon LV fluid, and a pump or clutch drums if inspection shows damage. The kit covers frictions, seals, gaskets, pistons, the filter and Zip Kit parts.
Yes. Transmission Digest documented a 2015 F-250 with no engagement cold that was caused by an undersized O-ring on a new filter neck. Rule that out with a pressure gauge before rebuilding.
Ford lists the 6R140 at about 4 gallons total. Use Mercon LV and set the final level hot using the service procedure.
