Is it possible to do rev-match on automatic transmissioned cars?

[leon200608]

We all know that on manual tranny cars, when downshifting from a higher gear to a lower gear while maintaining the same speed, a rev-match is necessary: because to maintain the same speed the engine runs faster in low gears than in high gears, so while downshifting the driver has to give a little gas to boost up the engine rev and then clutch into the wanted gear, this way you won't feel the sudden shake of the car.

So my question: in certain cases in auto-tranny cars you have to downshift from D to 3 or 2 (though not recommended sometimes), can you do a rev-match as well and how? Since the layout is P R N D 3 2 1, you can't go to N and rev up the engine and go to 3 or 2; but you also cannot step on the gas and then downshifting because that will just increase the speed and make the shifting worse.

[phiLLy11]

I don't think it's possible to "rev-match" with a convential automatic.

The only way I could think about it possibly happening, is say you were in D, shift it into N, rev it, and if your tranny allows, immediately shift it into 3, or whatever gear you want.

[leon200608]

I don't think it's possible to "rev-match" with a convential automatic.

The only way I could think about it possibly happening, is say you were in D, shift it into N, rev it, and if your tranny allows, immediately shift it into 3, or whatever gear you want.

Let's say on a blizzard day you are going downhill at 90km/h and you want to engine brake into gear 2 (well you can just slam on the brake but without ABS and ESP your car might slide), you shift into N and boost up the throttle, but then when you shift into 2 you have to go through D and 3, won't the higher gears just engage before you going to 2?

[Anonymouse]

If you want to slow down, use the freaking brakes. Unless you're descending a mountain, engine braking is for eejits who like to change transmissions and clutches rather than brake pads.

[ShadowVlican]

u have to time your throttle and downshift.. it's possible

try giving it some gas when you shove it down to D3 (delay the gas giving maybe 0.8sec cuz manual shifting automatics is SLOW)

[potato]

short answer is no.

you don't have a clutch, how would you double clutch.

it is an automatic, unless your brakes failed and you needed some way to slow down your car, i can not think of one reason you would ever need to do that.

if you want an automatic that rev matches get the nissan gtr. it has paddle shifting and computer controlled rev matching when you need to downshift.

if you are using a several thousand dollar transmission to slow down your car instead of hundred dollar brakes, your wallet is screaming at you to stop.

[mr_raider]

No need to get the GTR. The g35/37 tranny will blip the throttle for you when downshifting.

[leon200608]

GT-R? G35/G37?? Man.....I can't afford that.

[z24driver1986]

stop watching fast and furious lol

double clutching and rev-matching is intended for big Transport Trucks due to the fact that they don't have syncros in the manual transmission. The automatic and manual transmission are different. One could double clutch a manual car but it would b e pointless.

[Sepiraph]

With a CVT in manual mode, you can just downshift and ease off gas if you don't want the car to accelerate.

[leon200608]

With a CVT in manual mode, you can just downshift and ease off gas if you don't want the car to accelerate.

But CVT trannies have no gears aren't they? Just two pulleys with a belt??

[HBP]

stop watching fast and furious lol

double clutching and rev-matching is intended for big Transport Trucks due to the fact that they don't have syncros in the manual transmission. The automatic and manual transmission are different. One could double clutch a manual car but it would b e pointless.

uhhh... wtf? have you ever downshifted? i dont double clutch, but a rev-match is necessary to keep my spine straight.

[D-3vil]

But CVT trannies have no gears aren't they? Just two pulleys with a belt??

"Downshifting" in this case is approximated by selecting a higher gear ratio, so engine breaking has a more pronounced effect.

[D-3vil]

If you want to slow down, use the freaking brakes. Unless you're descending a mountain, engine braking is for eejits who like to change transmissions and clutches rather than brake pads.

Downshifting with a standard transmission is especially handy during the winter, whether you're an "eejit" or not.

[Tijuana]

With an auto tranny, if your in neutral and revving it, once you put it in any gear, wont you basically break the transmission, especially if you are revving it 4+k?