An automatic transmission, also called auto, self - shifting transmission, n - speed automatic (where n is its number of
forward gear ratios), or AT, is a type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually.
Part of that comes from the introduction of the same Ford / GM 10 - speed automatic transmission that powers the revamped, 2018 Ford F - 150, as the presence of more
forward gear ratios means that the engines — both the 5.0 - liter Coyote V8, and the 2.3 - liter EcoBoost I4 — can be kept at an ideal rotational speed more of the time.
Of this transmission's five
forward gear ratios, fourth gear is direct 1:1 and fifth gear is an overdrive 0.716:1.
Of this transmission's six
forward gear ratios, fifth gear is a direct 1:1 and sixth gear is an overdrive 0.799:1.
Since all 10
forward gear ratios fit within this 7.4 spread, the transmission should be able to keep the engine to which it's paired closer to peak RPM more of the time, meaning better acceleration or smoother hauling, towing, and cruising, depending on how it's being asked to operate.
The CVTi - S offers
a forward gear ratio range of 0.396 to 2.480, which works well for acceleration, cruising speeds, and fuel - conscious driving with a 4.761 final drive ratio.
Not exact matches
Take over, using the paddles to change
gear, and with every new
ratio comes a jolt
forward that doesn't happen in full auto.
The new transmission, with a die - cast aluminum housing, has seven
forward gears, including three overdrive
ratios, and a 5.6:1
ratio spread, and is described as «virtually dry wet clutches» by Tremec.
The dual - clutch automatic is no doubt faster in every day driving, but when pressing - on hard in manual mode, feels like the lower
gears are too widely spaced (a seventh
forward gear as coming in the Skoda Octavia RS 245 should bunch - up the
ratios nicely).
GM's base FWD 2 - mode system incorporates two electric motors, two planetary
gear sets and a system of four hydraulically - applied wet - plate range clutches to deliver two continuously variable speed -
ratio ranges (modes) and four
forward fixed
gear ratios.
Not content with only four
forward gears and unable to satisfactorily modify the 5 - speed unit, Ruf chose to use a new five - speed transmission of their own design on the CTR, which also gave them full freedom to customize
gear ratios.
The fact it «only» has six
gears, in a sector that's quickly adopting transmissions with seven, eight and even nine
forward ratios, means there's less of a chance of keeping the engines at their optimum cruising rev range.
With its additional
forward gear, the new automatic transmission has a wider spread of
ratios which benefits both fuel consumption and drivability.
With comparatively «short»
gearing in the first five
forward gears, acceleration is enhanced - while fuel economy and quiet cruising are optimized with a relaxed Sixth
gear ratio.
With its adaptable electronic shift maps and its 8
forward speeds (shorter «gaps» between
gear ratios) the TorqueFlite 8 - speed transmission rewards you with exhilarating acceleration on the one hand, and low - rpm, high - efficiency cruising on the other.
Ten is a lot of
forward gears, and Ford's new 10 - speed automatic transmission in the Ford F - 150 Raptor — a transmission co-developed with General Motors — puts the automaker ahead of the curve with regard to using more
gear ratios in order to optimize efficiency.