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27 votes
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Does flooring the throttle while traveling at lower speeds increase fuel consumption?

Bear with me, I'm going to clear up a myth, then answer your question. You will see that they are related. Higher throttle doesn't mean higher RPM. Higher throttle just means more fuel entering the ...
anonymous2's user avatar
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15 votes
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Is reverse gear in a manual transmission equivalent to any other gear?

Reverse is pretty equivalent to first gear, for a ratio of around 3.2ish. If it were any lower, it would be difficult to get started from a stop since the torque just won't be there. If you've ever ...
Dan A.'s user avatar
  • 494
14 votes

Does flooring the throttle while traveling at lower speeds increase fuel consumption?

My Volvo V70 (model year 2006) has the digital dashboard fuel consumption meter. I also have a nice, fairly long uphill climb on my way to work, so I've had opportunities to try various methods. This ...
user's user avatar
  • 462
14 votes

How do I put my automatic car into neutral while moving in drive?

You can put your car into neutral by moving the gear selector into the position marked "N".
WeakMech's user avatar
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12 votes
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Skipping gears when downshifting

If your car is slowing down, and you are at a "safe" speed for 2nd gear, then its perfectly normal to skip gears. If you're going the wrong speed and the engine RPMs aren't even close to what they ...
JPhi1618's user avatar
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11 votes

Need to rotate an out of reach bolt or pin

Did you ever wonder why an open ended wrench is angled at exactly 15° ? That's so you can turn a nut a little bit, flip the wrench over, turn it a little bit more, and get the job done! You ...
zipzit's user avatar
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11 votes
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Mysterious "5th" Gear on a 4-Speed Automatic?

The transmission has a lock up torque converter. The torque converter sits between the engine and transmission. It is kind of like a clutch on a manual transmission car. When the engine is idle, it ...
rpmerf's user avatar
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10 votes
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Should I wait for my car to be completely stopped before putting it in reverse?

It causes more wear on the clutch as you have to ride it a little more, but overall its fine. The syncros will likely wear a little faster also as the output shaft will be spinning in the opposite ...
rpmerf's user avatar
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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
9 votes

What mechanical action is heel and toe (clutchless) shifting trying to accomplish?

I'm going to expand on rpmerf's answer, where he has disambiguated between Heel and toe and clutchless shifting. I'l briefly explain the driving technique only to better illustrate what it hopes to ...
chilljeet's user avatar
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8 votes
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How to make an electronic system know which gear the engine is on?

If the engine had a gear position sensor or you were considering installing one, i'd assume you wouldn't be asking this question. Anyhow, still , if you can install one, that'd be your easiest option, ...
chilljeet's user avatar
  • 2,196
6 votes

Fuel efficiency and Shifting/RPM

The specific answer to your question lies in the BSFC (Brake Specific Fuel Consumption) map for your engine, combined with the desired output. The BSFC map shows how efficiently the engine converts ...
KnowledgeQuest's user avatar
6 votes

Manually shifting an automatic transmission?

I've rebuilt a few transmissions (actually a lot of transmissions LOL) and no, manually shifting is just fine. All your doing is replacing the TCU with your own shifts. So your just fine manually ...
DMBalo's user avatar
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6 votes
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How would you stop if the ignition switch failed while driving?

The brakes should still work, but without power assist so they take more force. Same for steering. I would shift to N and then brake while heading to the shoulder. I had a K1500 Blazer of about this ...
jxh's user avatar
  • 148
6 votes
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In a manual car, does changing gear quickly put more wear on the synchro's?

Yes. When you change gear slowly, the input shaft rpm has time to drop off before the synchromesh engages, so the speed difference that has to be overcome by the synchromesh is small. When ...
Hobbes's user avatar
  • 4,412
5 votes

Manual transmission noise

One possibility is that the synchromesh has worn on 3rd gear. The synchro is a clutch that matches the speed of the gears before they mesh together. If the synchro is worn, then the gears will not ...
HandyHowie's user avatar
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5 votes

mercury milan key stuck in ignition, shifter will not come out of park

Yes, there is an interlock between the ignition and the shifter, as well as an interlock between the shifter and the brake pedal. Something could have gotten messed up somewhere. There is a ...
zipzit's user avatar
  • 6,559
5 votes
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Shifting on a motorbike by preloading

It won't damage your transmission unless it damages your transmission You have a shift drum. It has grooves in it around the outside diameter that the shift forks follow to slide gears into gear as ...
DucatiKiller's user avatar
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5 votes

Does flooring the throttle while traveling at lower speeds increase fuel consumption?

By shifting down the gear you just add more torque to be able to accelerate up hill. If you don't want to accelerate uphill you can reduce throttle and keep climbing. That brings you into the constant ...
user31757's user avatar
5 votes
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From a complete stop, is it A MUST to switch from neutral to 1st gear before switching to 2nd gear if I want to accelerate again?

It's not really a "must" - but it's a very good idea. I'm thinking of 1st gear (for manual transmission car) as equal to the Smallest Chainring (for mountain bikes). This is where you're going ...
motosubatsu's user avatar
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4 votes

Shifting on a motorbike by preloading

I don't have experience on as many different bikes as some people, but here's what I have found. But "preloading" the shifter, were talking about pressing on it just a little before you are ready to ...
JPhi1618's user avatar
  • 13.2k
4 votes

Why is my shifter lever extremely stiff or hard to shift gears?

There could be a couple culprits here. First of all the clutch might not be adjusted correctly so when you pull the clutch in, there is still a load/pressure on the gears so when you go to kick up or ...
Dima Thefencingdude Lukhtai's user avatar
4 votes

Automatic transmission shift problem on a 2002 Chevrolet Impala

Look at your shift linkage cable, it may be loose or parts that it attaches to may be worn out. Remove the trim around your shifter to look at that end of the cable, make sure it's firmly attached ...
tlhIngan's user avatar
  • 12.2k
4 votes

How would you stop if the ignition switch failed while driving?

In nearly all situations, the way you stop if the ignition switch is the way you stop if the ignition switch is working: you stop pressing the gas, and hit the brakes. It's literally that easy. ...
Cort Ammon's user avatar
4 votes

Should I stop shifting out of gear without the clutch?

There are three components of wear I will consider: shift linkage, gear synchronizers, and clutch throwout bearing. Shift Linkage The number of times you use the shifter will not be altered by ...
Nathan Smith's user avatar
4 votes
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After changing MTF, my truck grinds into every gear. Is this a symptom of a bad transmission? Or just a bad clutch?

You can´t just substitute GL-5 for GL-4. Get the appropriate Oil. If you want do go more in depth, here is a very good pdf, also mentioning older nissan tranmissions. Also 1 Liter sounds not so much, ...
Daniel's user avatar
  • 1,072
4 votes

Why is my motorcycle making a "bang/thud" noise when I shift?

There are a couple things that can be causing this. Engine/Trans oil - depending on the motorcycle, if the oil level is low, it could cause noise when shifting. Clutch adjustment - If the clutch is ...
CharlieRB's user avatar
  • 9,015
4 votes
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What caused my manual transmission to rev while shifting gears and now won't go at all?

It sounds like the clutch friction disk material is gone. Your description of it revving to 3000-4000 rpm before finally engaging is typical of clutch slip, which means the clutch was on the way out ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes

How to make an electronic system know which gear the engine is on?

I am not sure how you will make this work but you could keep track of the shift fork position or you could measure the angle of the shift drum. https://www.youtube.com/watch?v=E2CybLSrN5Q Maybe you ...
krthkskmr's user avatar
  • 468
3 votes

My car won't shift into second its a 5 speed what can it be?

I'm not intimately familiar with the Altima's linkage, but I bet something is worn in the shift linkage not allowing it to go into second gear completely, especially since it happens when the vehicle ...
Pᴀᴜʟsᴛᴇʀ2's user avatar

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