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45 votes

Leaving car with automatic transmission in Neutral instead of Park

Depends on the car.. some won't let you remove the key from ignition if it's not in park. To be honest I really wouldn't worry about "crossing" reverse when heading for Park there is usually a slight ...
motosubatsu's user avatar
  • 10.2k
37 votes
Accepted

Need I press clutch pedal while starting my car in neutral?

It depends on the specific vehicle. Many modern standard transmission cars in the US have a clutch pedal sensor that will not allow you to start the vehicle if the pedal isn't fully depressed. You'...
Bob Cross's user avatar
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34 votes

How to add a 7th gear to a car to enhance fuel economy?

This is something that used to be quite common - in the '60s and '70s, people would add an electronic (or manual) overdrive to the back of the 4-speed gearbox to give an extra gear (usually two, as it ...
Nick C's user avatar
  • 28.8k
28 votes

Leaving car with automatic transmission in Neutral instead of Park

The simple answer is "No". There is no useful reason/benefit to using the transmission any other way than it was designed. Use PARK (P).
CharlieRB's user avatar
  • 9,015
27 votes

Need I press clutch pedal while starting my car in neutral?

Being from Canada, I feel compelled to mention that if you do not depress the clutch while starting when it is at all cold out (let's say < 0 Celsius) you will notice the starter motor labouring ...
jkf's user avatar
  • 422
22 votes

What does exhaust smell on oil and transmission dipstick mean?

First of all you're not smelling CO (carbon monoxide) as that is an odorless and colorless gas. What you are likely smelling are combustion byproducts and that is not at all uncommon in the engine ...
jwh20's user avatar
  • 12.1k
16 votes

Do cars go from Drive to Neutral on their own?

To my understanding, no. I've never seen this behavior before in any auto I've ever driven or read about. I think it would be a safety issue if it did. If you needed to move suddenly (for whatever ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
16 votes

Leaving car with automatic transmission in Neutral instead of Park

Setting your car in Park does not cause wear of any kind, and most automatics I have driven will not start or let you remove the key in any other position than Park. First of all, I'd like to point ...
Kenny's user avatar
  • 260
15 votes
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Why aren’t drive chains completely taut?

The main reason slack is needed is the rear suspension of the bike. In a "perfect" setup, the axis of the rear swing-arm and the final drive of the engine would be one and the same. This is not ...
JPhi1618's user avatar
  • 13.2k
15 votes

Leaving car with automatic transmission in Neutral instead of Park

Because of the way an automatic transmission works, this really is a non-issue. You're probably thinking about how in a manual transmission, when you move the gear shifter, you are physically pushing ...
JPhi1618's user avatar
  • 13.2k
14 votes

Need to find out what part is called

It's not too clear which part you're referring to, so I've annotated your image with the most likely items.
PeteCon's user avatar
  • 8,712
14 votes

Why do you use the "park" gear to park a car and not only the handbrake?

Putting the transmission into "Park" engages the "parking pawl" - essentially a metal pin that locks the output shaft of transmission (and thus the driven wheels) in place. As to why it exists - it ...
motosubatsu's user avatar
  • 10.2k
14 votes

Accidentally put CVT into park

Shifting into park engages the parking pawl inside the transmission and physically locks up the gears. If that mechanism was engaged at sufficient speed and no safety existed to prevent it, most ...
Z4-tier's user avatar
  • 241
13 votes
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How is it possible for the crankshaft RPM to not directly correlate to the driveshaft RPM?

The torque converter picks up the slack In essence, this device connects the engine crankshaft to the transmission's input shaft through a fluid-type coupling. Once the turbine spins fast enough ...
Zaid's user avatar
  • 39.2k
13 votes

Accidentally put CVT into park

While it's definitely not good to do this, if it's running/driving fine, you've most likely suffered no damage. Considering the speed at which you did it was so low wasn't very fast and shouldn't have ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
12 votes
Accepted

Do Manual transmission cars perform better than Automatic transmission?

The difference comes down to the driver. While automatic racing gearboxes can beat a driver when it comes to performance, for the type of vehicle you describe, a manual can perform significantly ...
Rory Alsop's user avatar
  • 18.6k
12 votes

Does an increase in horsepower allow a greater speed in any given gear?

The answer is no because you mention being limited by your redline. Regardless of power, a certain RPM will result in a certain speed for a given gearing. Chances are the gear ratios were chosen ...
JPhi1618's user avatar
  • 13.2k
12 votes
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94 Toyota Pickup hard to put into gear after clutch in too long

If its a hydraulic clutch, it may be bleeding off, either a leak or a bypassing clutch master cylinder.
Moab's user avatar
  • 7,990
11 votes

What differences are there between straight cut and helical cut gears?

Great question! There are several basic differences. Here is my main article that I am pulling from. Firstly, straight-cut gears produce less side-to-side torque, allowing the engine to deliver much ...
anonymous2's user avatar
  • 5,235
10 votes
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How Does a Quick Shifter work in a motorcycle

Why the Quick-Shifter? Since these are called quick-shifters we'll dub slow-shifting the traditional way of shifting gear. When you slow-shift you usually close the throttle, disengage the clutch, ...
JoErNanO's user avatar
  • 1,765
10 votes
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Why is it almost impossible to put the car in first gear at high speeds?

There are physical limits to sychronizers. When you upshift the synchronizer slows the clutch down which is relatively easy. When you down shift the synchronizer has to speed the clutch up which is ...
vini_i's user avatar
  • 16k
10 votes
Accepted

Driving down hill in gear without throttle

As you say you change gear from 3rd to 4th, this means you have changed the gear ratio between the engine and the wheels causing a different engine rpm.
Solar Mike's user avatar
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10 votes
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How do you remove a lock ring if there is no place to squeeze it?

I used to use a hook type tool to bring the first bit of the clip away from its slot then slide a suitable feeler blade or very small bladed screw driver down behind the created gap. Continue to slide ...
Orb's user avatar
  • 5,067
10 votes
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Does an increase in horsepower allow a greater speed in any given gear?

Summarized Answer No, HP does not determine MPH in a gear, the gear ratio does. Although there are hypothetical ways that HP can seem to make the vehicle go faster in the same gear, it doesn't ...
kyle_engineer's user avatar
10 votes

How to add a 7th gear to a car to enhance fuel economy?

As @SteveMatthews points out in the comments, it depends on the make/model of the car. To answer your question outright, though, you cannot just "add" another gear. A transmission in most cases are ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
10 votes

Accidentally put CVT into park

If indeed damage was done, you'll know it soon enough. What's a mechanic going to do? Disassemble the transmission and look for damage? That's going to cost about as much as a rebuild, if that's ...
jwh20's user avatar
  • 12.1k
9 votes

Why doesn't anyone ever repair an automatic transmission?

I know that this is an old question, but I want to provide a brief answer. Amount of work that is necessary to fix anything inside the transmission is very close to the amount of work that is ...
Dmytro Zakharov's user avatar
9 votes
Accepted

How does the Koenigsegg Regera work?

Well, you have posted the link to the website, where they explain it, and also give this image: There are three E-motors. Two on the axes, and one on the same shaft as the combustion motor (C-motor), ...
sweber's user avatar
  • 7,057
9 votes
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Should gear shift center itself while in neutral?

Its going to be one of 3 things, its either the shifter bushings, needs an adjustment, or the return springs are worn out. All of those are fairly easy. When you put it in gear is there a lot of ...
DatsunZ1's user avatar
  • 140

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