sizeddenim
02.06.2021 9:46:04
Push by your buddy, no. Push with another vehicle, yes - but as the other Steve M suggests you'll need the high side of 25-35mph to maybe make this happen. [links]
See full version: Push start a car with automatic transmission
Push by your buddy, no. Push with another vehicle, yes - but as the other Steve M suggests you'll need the high side of 25-35mph to maybe make this happen. [links]
Use case: Let's say the battery is dead or you have a bad starter. I know this can be done on manual cars by putting the car in to gear after the car starts moving.
I believe you can do it with a traditional torque converter. I've done it. It's not smart. [links]
Does the automatic transmission type matter? (traditional torque converter, CVT, DCT, etc.) more
Without the tranny fluid pump driven, you won't get TC proper fill, BUT there's usually enough residual fluid left in the TC to attempt this unwise stunt. It;s the difference between a really good transmission fluid service and the ones we all actually did. How many of us oldtimers removed the shield (back when you could) and rotated the TC, pulled the plug, and drained the converter? No flame here; I'm as guilty as any. [links]
You could push start automatic transmission vehicles through about 1958 to mid-1960s. Some of the 90s motors you could push start include Chevy Powerglide, GM’s Hydramatic, Ford’s Cruise-O-Matic, etc. more
Meanwhile, some automatic transmissions were designed to let you push start a car. A typical off-road vehicle would push start; however, you would have modified it extensively, plus adding pumps or external oil accumulators. here
There are several other options and ways on how to start an automatic transmission car with a dead battery and get it running. But let’s look at an in-depth answer on if it is possible to push-start an automatic car.
But, if you are tempted to push-start your automatic car, get another vehicle to push it. It’s unlikely that you can push it to a 30mph rolling speed to trigger the engine. Another vehicle pushing yours may achieve the feat.
However, in an automatic transmission, you can’t engage the gear, then disconnect it from the motor for it to roll like the manual transmission clutch, which is a huge difference between an automatic transmission and manual transmission.
Push starting an automatic transmission car feel like what would work, but it will not, especially if you own a modern vehicle. Your best bet is to fix the starter or battery.
Meanwhile, some automatic transmissions were designed to let you push start a car. A typical off-road vehicle would push start; however, you would have modified it extensively, plus adding pumps or external oil accumulators. here
The pressure there is created by the pump on the input shaft, which is rotated by the motor. While there is no pressure, the friction gears are disengaged and the output shaft, which transmits the rotation to the wheels, is not connected in any way to the primary one. here
Unlike the primary oil pump that is located in the input shaft, there are old automatic transmissions that have that second pump on the output shaft. Taking advantage of that second pump, when the car is towed the wheels are able to create the necessary pressure there to start the car. [links]
These car owners are lucky, the cars can tolerate this starting method without much negative consequences due to the presence of a second oil pump. [links]
Sounds better in theory, right? In practice, it is hard to achieve not only the speed itself, but also it takes attention and skill to set the lever in several positions. This method may work on cars mentioned above, but not in other cases.
But, if your car’s automatic transmission is among the few exceptions, push starting can be possible. More details on that will be given below.