The 6R is a six-speed automatic transmission for longitudinal engine placement in rear-wheel drive vehicles. It is based on the ZF 6HP26 transmission[1] and is built under license by the Ford Motor Company at its Livonia Transmission plant in Livonia, Michigan. The 6R debuted in 2005 in the 2006 model year Ford Explorer and Mercury Mountaineer.
| 6R | |
|---|---|
| Overview | |
| Manufacturer | Ford Motor Company |
| Production | 2005–present |
| Model years | 2005–present |
| Body and chassis | |
| Class | 6-speed longitudinal automatic transmission |
| Related | ZF 6HP Aisin AWTF-80 SC Transmission GM 6L50 Transmission GM 6L80 Transmission |
| Chronology | |
| Predecessor | Ford AOD |
| Successor | Ford 10R80 |
The 6R80 was available in 2009 and until 2017 Ford F-150 trucks. It features torque converter lockup capabilities in all 6 gears and an integrated "Tow/Haul" mode for enhanced engine braking and towing performance. For the 2011 model year, the transmission was revised to provide smoother shifts, improved fuel economy, and overall better shift performance. Most notable of the improvements was the addition of a one-way clutch that provided smoother 1-2 up-shifts and 2-1 down-shifts. The transmission has a relatively low 1st gear and two overdrive gears, the highest of which is 0.69:1. This provides exceptional towing performance when needed, while maximizing fuel economy by offering low engine speeds while cruising.
The 6R80 can be found behind the 3.7L V6 all the way up to the 6.2L V8. Ford has stated that while the transmission is used in multiple applications, each transmission is optimized and integrated differently depending on the engine it is mated to. The 6R80 features "Filled for Life" low viscosity synthetic transmission fluid (MERCON LV), though a fluid flush is recommended at 150,000 miles if your truck falls under the classification of "Severe Duty" operation. The transmission, as used in the Ford F-150, has a fluid capacity of 13.1 quarts and weighs 215 lbs.
The 6R-transmissions are based on the ZF 6HP gearbox. The gear sets of the 6R140 are deviant.[2]
| Gear Teeth
and Ratios |
Planetary Gearset: Teeth
Lepelletier Gear Mechanism |
Count | Total | Avg. | |||
|---|---|---|---|---|---|---|---|
| Ravigneaux | Simple | ||||||
| Type | Application | Sun 1.1
Ring 1.1 |
Sun 1.2
Ring 1.2 |
Sun 2
Ring 2 |
Brakes
Clutches |
Ratio
Span |
Gear
Step |
| Gear | 1 | 2 | 3 | 4 | 5 | 6 | R |
| 6R60
6R80 |
Passenger Cars
800 Nm · 590 lb·ft |
31
38 |
38
85 |
37
71 |
2
3 |
6.0354 | 1.4327 |
| Ratio | 4.1708 | 2.3397 | 1.5211 | 1.1428 | 0.8672 | 0.6911 | - 3.4025 |
| 6R140 | Super Duty
1400 Nm · 1033 lb·ft |
37
47 |
47
97 |
49
95 |
2
3 |
5.8993 | 1.4261 |
| Ratio | 3.9738 | 2.3181 | 1.5158 | 1.1492 | 0.8585 | 0.6736 | - 3.1283 |
| Final Drive | |
|---|---|
| Car Type | Ratio |
| 4.10 | |
| 3.73 | |
| 3.55 | |
| 3.31 | |
| 3.15 | |
| 2.73 | |