6R75 Shift Kit 2006, new and ready to install. Fits the 6R75. Ships fast from the USA.
Own a 2007 or 2008 Expedition or Navigator with the 5.4L and the six-speed automatic? That transmission is the 6R75, the short-run, heavier-rated sibling Ford used before the 6R80 took over in 2009. These trucks tow and haul, and that is exactly the duty that wears the valve body. A shake at 30 to 45 mph that feels like a tire, shifts that go long and slippery once the truck is hot, or a thump coming down to a stop are the complaints this kit was designed around. It is the new TransGo SK 6R80-A, and the 2006 in the title is the start of TransGo's GEN1 coverage, which takes in the 6R60, 6R75 and 6R80 alike.
The 6R75 has the same GEN1 valve body architecture as the 6R60 and early 6R80, so it carries the same two hydraulic problems. The pressure regulator valve, which every clutch apply depends on, wears its bore and balance bushing until line pressure becomes erratic. A heavy truck pulling a trailer magnifies that, because a clutch that slips a fraction longer under load generates heat the fluid has to carry away. The second problem is the torque converter clutch regulator valve, whose factory calibration lets the converter clutch quiver at light throttle. TransGo replaces both with drop-in hardened steel valves that have longer lands, so they seal on fresh bore surface without machining. The kit adds a new PR spring and boost bushings, a calibration spring for the TCC valve, wire retainers and six damper inserts. It restores pressure control; it is not built to make a 6R75 bang through the gears.
Rule out the easy stuff first. Low fluid causes both slip and shudder, and the level on these units has to be read at 190 F on a scan tool, at the top of the hash marks. Next, separate hydraulic faults from electrical ones. A circuit code for a solenoid means a wiring or solenoid fault, not worn valves. If your codes are ratio or performance only, the pressure regulator and TCC circuits are the prime suspects. Our Expedition shift problems guide and Navigator shift problems guide cover diagnosis on these exact trucks, including the newer-model recalls that do not apply to a 2007-2008 6R75.
The 6R75 only ever used the GEN1 valve body, and this kit covers every GEN1 Ford and Lincoln six-speed in the family from 2006 up. That means it fits 2007-2008 Expedition and Navigator 6R75 units as well as the 6R60 and the 2009-2014 6R80. If your valve body has been replaced, confirm it the way TransGo does: take out the original PR valve and measure the land diameter. GEN1 measures .495 in and takes this kit. GEN2 measures .514 in and does not. If you are unsure what is in your truck, send us the year and VIN first. The full lineup for this family is on our 6R75 and 6R80 parts page.
| Fits | 6R75 2006 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The 6R75 is found in the 2007-2008 Ford Expedition and Lincoln Navigator. Ford moved those trucks to the 6R80 for 2009. If you are not sure, send us your VIN and we will check.
Yes, as a repair. It restores steady line pressure and stops the converter clutch from quivering, which reduces the slip and heat that towing magnifies. It is not a firm-shift performance kit.
No. TransGo uses one kit, SK 6R80-A, for all GEN1 6R60, 6R75 and 6R80 valve bodies. The only exception is a GEN2 valve body, which you can identify by a .514 in PR valve land.
Maybe. TransGo notes that if the quiver has gone on for more than a month or two, the converter clutch may be damaged too, although many shops report the kit plus fresh fluid clears it.
Inspect and replace flattened damper inserts and broken wire retainers, which the kit supplies. Replace solenoids only if they have codes or very high mileage.
