Questions tagged [manual-transmission]

A transmission that is controlled by the operator of the vehicle to select an operator desired gear.

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97
votes
17answers
235k views

Does Downshifting (Engine Braking) Cause Extra Wear and Tear?

Does the act of downshifting to slow your vehicle down have any negative side affects? I don't downshift more than one or two gears at a time and I let out on the clutch slow enough that I don't rev ...
26
votes
10answers
45k views

Manual transmission at stop: 1st with clutch in, or neutral with clutch out? -OR- Throwout Bearing wear

When sitting in traffic or at a long red light, is the Best Practice to have the car in 1st gear with your foot on the clutch, or in neutral with your foot off the clutch? Some say that you should be ...
24
votes
6answers
146k views

Clutch less shifting - why does it work? Is it bad?

I have been driving stick for 15 years and within the last year I learned I can shift gear without the clutch. Normally the transmission will not let me shift gears without using the clutch. However,...
22
votes
3answers
5k views

How do the latest automatic transmissions match the efficiencies of manual gearboxes?

Most people know that for old or even somewhat old cars, manual transmissions are more efficient. Recently automatic cars have become almost as efficient or even as efficient as manuals. I was ...
21
votes
2answers
18k views

Why is towing a manual transmission car, in neutral, with the drive wheels on the ground, considered safe?

It is clear that cars with automatic transmissions cannot be towed with any drive wheels on the ground, engine off, in neutral, because the torque converter powers the lubrication pump for the ...
20
votes
11answers
33k views

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

As I know, clutch pressing and neutral gear both disengage the engine from wheels. So will it matter if I do not press the clutch if I start in neutral?
19
votes
7answers
5k views

Are manual transmission cars disappearing? [closed]

You don't have to be an expert to notice that over time, the percentage of manual transmission cars has lowered. Automatic cars are not only more popular, but more comfortable, easier to use and ...
19
votes
3answers
47k views

Lugging the Engine (Manual Transmission)

So...lugging the engine obviously isn't something that is good. But why? For example when you feather a clutch to get the car moving, it lugs for a quick moment when you hit the catch point (When ...
18
votes
11answers
14k views

What's the best gear to leave a manual vehicle in when parked? [closed]

I've been told that reverse is the "strongest" gear, so in a manual transmission vehicle you should park your vehicle and leave it in reverse in the event of a parking brake failure. Others have said ...
18
votes
3answers
43k views

WHY does an engine stall? (manual transmission)

Before you write off my question as one that's been answered a million times already, I want to clarify. I understand that the engine needs to go a certain rpm and when you try to engage the clutch ...
17
votes
4answers
6k views

Why does the rear of my vehicle sink when I apply the handbrake on a downward gradient?

This is something that I've always wondered. I'm no mechanic (web developer, actually) with very basic knowledge of vehicle mechanics so I can only guess at something like brake pipe pressure being ...
16
votes
3answers
22k views

Is it harmful to drive at high rpms

Does driving at high RPMs (3000-3500) in a manual transmission car cause any extra wear and tear to any mechanical parts? It obviously hurts gas mileage, but does it hurt anything else?
16
votes
2answers
69k views

Engine revs high 5th gear manual transmission

What might cause a car with a manual transmission that in 5th gear when given a punch of gas revs to very high rpms – with no power transferred to the wheels (i.e. the tachometer and speed go ...
15
votes
4answers
7k views

Why do 5 and 6-speed transmissions typically need different gear ratios?

My 2013 Subaru WRX has a 5-speed manual, and I long for it to have a 6th gear when cruising on the highway. A friend has a 2012 Subaru STI with a 6-speed manual, and I noticed his car runs through ...
15
votes
5answers
84k views

How difficult is it to rebuild a transmission?

I have a 1984 Toyota Supra that is now exclusively a track car. The last round out we let some less experienced drivers take the wheel and they basically destroyed the transmission. Nothing but 4th ...
14
votes
5answers
5k views

What are the pros and cons for the two possible “gear directions” when parking the car on a hill?

Let's suppose I leave my car in gear when parking on a hill (besides using handbrake and turning the wheels towards/away from the curb, depending on the direction I'm parking in). In case that matters,...
14
votes
5answers
78k views

Switching from Reverse to Drive - always stop completely?

I've been told by a couple people that it's really bad for a car to be shifted from Reverse to Drive while the car is still moving backwards. Is this true? In my experience: On automatic cars, this ...
14
votes
5answers
24k views

Causes of early clutch failure EXCLUDING driver style

UK 61 plate, Ford Diesel Mondeo Estate, Econetic: clutch replaced at 31,800 miles; failure caused by 'driver style' I use my car daily for commuting and for business. It's supplied to me as a company ...
14
votes
1answer
3k views

Is reverse gear in a manual transmission equivalent to any other gear?

Question is pretty well summarized in the title. If we were to order gears in terms of power provided, where would reverse fall between gears 1-5 on a manual transmission vehicle? Does it vary by ...
13
votes
6answers
4k views

What would happen if you shifted into reverse while you are going forward?

First, I am talking about manual cars and I know this is considered impossible because of the synchronized gears, but lets suppose that you can manage to shift gears (For example you could shift into ...
12
votes
9answers
10k views

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

Let's say there's a 6-Gear manual transmission car, whose 6th gear equals 2000 rpm at 100 km/h (~60 mph). How can one theoretically add a 7th gear that can maintain the same speed at 1400 rpm in ...
12
votes
2answers
5k views

Does my electronic parking brake remain engaged if I disconnect the battery?

I have a manual Audi A4 with an electronic parking brake. For safety reasons, I'm planning on leaving the battery disconnected for about a month while I do a variety of cosmetic work on the vehicle (...
12
votes
4answers
80k views

What disadvantages a car with 4-speed transmission have compared to 5, 6 or 7 speed with similar engine?

This seemed to be most relevant site to ask my question. I am planning to purchase a new car and my shortlisted car has 4 speed automatic and 1.6 litre engine. The thing that worries me is that it ...
12
votes
4answers
8k views

Is it OK to skip gears on a motorcycle?

I'm not sure if this is on topic, but I'd like to know the answer before it comes a repair question. I have a Y2K Triumph Speed Triple - great bike. First gear comfortably takes to 90km/h. Needless ...
12
votes
2answers
5k views

Car won't come out of reverse gear unless rolling

I have a 1989 Nissan Skyline R31 and when I put it into reverse, it will refuse to come back out of gear. The clutch was changed a few thousand km's ago and has had this problem recently. The only ...
11
votes
4answers
76k views

Optimal RPM range for manual transmission

Are there optimal RPM ranges for different vehicles? I've been told it's better for the engine to drive at slightly higher RPMs (e.g. 2500-3000 for my Tacoma) than low (1000-1500). I understand a ...
11
votes
1answer
11k views

Why does my vehicle still stay in gear when I press clutch to floor?

I've read these posts but I still don't fully undestand how a clutch works. Clutch Test Clutch Adjust Clutch Troubleshoot Clutch Has Low Catch A few weeks a go my mechanic replaced the clutch master ...
10
votes
5answers
15k views

Is it possible to have a manual transmission electric car?

Reading about the new supercar from VW, I distinctly noticed when the author specifically mentioned shifting to "drive". I know the car in article is an automatic, but it got me thinking. Is it ...
10
votes
9answers
42k views

Durability of automatic transmission boxes versus durability of manual transmission boxes? Their lifetimes?

My friend is against cars with automatic transmission because he thinks that they break easily and that their repairing cost a lot. He thinks that it is impossible to maintain an automatic ...
10
votes
5answers
64k views

Is it bad to drive slow at low rpms in 4th or 5th gear? Do you get better gas mileage?

Obviously running your engine at too high an RPM for too long isn't good. But what about running it too low? not so low that it stalls or lugs, but within around 1,000 RPM? Would you get better ...
10
votes
1answer
2k views

How does Audi Crown Gear Center Differential work?

I'm trying to understand how the engagement of the clutches is varied. I see the power is transmitted through the center input shaft and is transmitted through the four pinion gears, but I don't ...
9
votes
6answers
3k views

Can I confirm clutch slippage by shifting without disengaging the clutch (while stopped)?

This question got me thinking about a possible test that anyone driving a manual transmission could perform to diagnose severe clutch plate slippage: Engage handbrake, make sure there is nothing in ...
9
votes
3answers
3k views

When stopping, should I put the transmission in neutral?

When I have to stop the car but I know that I will be moving again soon, on the red light for example, should I shift to neutral? When I was learning how to drive, my instructor said that there is no ...
9
votes
3answers
964 views

How to find out if my non-fuel injected car has a rev limiter?

I'm driving a 1991 Citroen BX TGE16 which doesn't use fuel injection and I'm worried it doesn't have any fuel and spark cut off system so I don't over do it when downshifting or engine breaking. Can ...
9
votes
2answers
2k views

Skipping gears when downshifting

Is it bad to skip gears when downshifting manually, e.g. from 4th directly down to 2nd etc?
9
votes
2answers
93k views

Parking — in gear or neutral? [closed]

This question is discussed all over the internet, but it seems to be just a voting procedure. I'd like to get a high-quality answer, and, since I couldn't find it on SE, I'll ask it again here. With ...
9
votes
3answers
17k views

Grinding when shifting into 1st from a stop

My car (2013 Ford Focus, 12k miles, 5 speed manual) suddenly started to grind when shifting into 1st from a stop about halfway through my commute home. I realized that if I depress the clutch for long ...
9
votes
2answers
3k views

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

My 1985 Yamaha 750 Maxim shift lever is extremely stiff or hard to shift. When I pull off the casing that it passes thru or even loosen the bolts to the case it shifts normally. What can the issue ...
9
votes
3answers
4k views

Is it common to fail engaging first gear or a manual transmission car occasionally?

I have a problem with my 2011 Toyota Yaris manual transmission car where the first gear occasionally doesn't engage when at standstill. This happens rarely, probably once per month. What I do to get ...
9
votes
1answer
623 views

Pontiac G5 transmission sometimes grinds when shifting into first while stopped, occasionally stalls car

I have a 2007 Pontiac G5 with a 5-speed manual (Getrag F23 if you're curious) and about 145k miles. This problem has been ongoing for a couple years now but is progressively getting worse. Sometimes ...
8
votes
2answers
4k views

Do Manual transmission cars perform better than Automatic transmission?

I'm stuck between choosing a car available in both automatic transmission (CVT) and Manual transmission (6 speed). I wanted to know which one will perform better in the following aspects (considering ...
8
votes
1answer
2k views

Is it bad to shift into reverse while still moving forwards?

I often put my manual car into reverse while still moving forwards. I do it at less than 10mph. However, sometimes the gears crunch. Am I doing any damage by doing this? Why do the gears crunch? I ...
8
votes
2answers
1k views

Why can't the 3rd generation Mazda rx7 safely coast downhill in neutral?

The manual for the 3rd generation Mazda rx7 says not to roll downhill without the engine engaged, because the exhaust can overheat. Unfortunately, the manual does not explain the mechanism by which ...
8
votes
2answers
602 views

Can you still “motor” a manual transmission car with the starter motor?

When I learned to drive a manual transmission, I learned by accident that if I started it in gear without engaging the clutch, it would lurch forward, and might even start and drive on. (Usually I was ...
7
votes
4answers
869 views

Are there cars that can shift to reverse even while moving?

I am aware that a car has to be at full stop in order to shift to reverse. Then I saw a video which was able to do a reverse without even stopping. Insane parking https://www.youtube.com/watch?v=...
7
votes
2answers
1k views

2012 Mazda3 shifts gears but won't move

My car was shifting fine. All of a sudden I attempted to slow down for traffic, depressed the clutch to downshift and nothing happened. Coasted to side road. Attempted to depress the clutch and I put ...
7
votes
2answers
2k views

Why is it almost impossible to put the car in first gear at high speeds?

Why doesn't the transmission allow me to put the car in any gear I want (e.g. first) at any speed I want? Is the transmission (including the synchronous gears) disconnected from the flywheel when the ...
7
votes
7answers
32k views

How will I know clutch pads need replacing?

I have a manual shift honda civic. How would I or the motor mechanic know that the clutch pads need replacing? Would they check it during oil change? Certainly you don't open the transmission box to ...
7
votes
1answer
138 views

Which parts in the diagram are syncronizers?

I have a 99 Nissan Almera ( similar to the Sentra ) with a GA16DE engine and RS5F31A manual transmission. I quite likely have a bad fifth gear synchronizer, and am trying to find what part to order. ...
7
votes
1answer
8k views

Sometimes my second gear is rough to engage. What could be wrong?

So I've got an odd problem for a 2004 Toyota Echo. The second gear, sometimes not always, is hard to engage. If I be real gentle, and just put a bit of pressure, it would slip in. I could also be a ...