These are questions regarding either manual or automatic gearboxes and their component parts.

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11
votes
4answers
1k views

Do cars go from Drive to Neutral on their own?

While stopped at a railroad crossing in my A/T Honda CRV with my car in Drive and my foot on the brake; does my car eventually go into Neutral on its own if I'm there for while?
12
votes
4answers
12k views

What is the life expectancy of a Honda Civic Hybrid Continuously Variable Transmission?

I have a 2006 Honda Civic Hybrid with continuously variable transmission (CVT). At the 90k tuneup, the mechanic added 3.5 quarts of the regular automatic transmission fluid. At 110,000 miles, the ...
7
votes
1answer
110 views

Should I change transmission fluid if it's black?

I bought a vehicle couple of weeks ago. I checked the transmission fluid today, and noticed it was black. Should I be worried and immediately go change it? Part of me wants to get it changed since I ...
5
votes
2answers
5k views

Host of small performance problems in 2006 Hyundai Elantra

I bought a used 2006 Hyundai Elantra (Automatic) back in early 2011. At the time, I was needed to have a car quick, and it seemed like a good deal, but the longer that I've owned it, the more problems ...
4
votes
4answers
102 views

Will my 2002 Mustang make it from California to Iowa?

I have a great 2002 Mustang automatic 6cyl in great condition, but I am a worrier and want some outside opinions. I am the second owner of the vehicle. Have owned it for 1year, 7 months and I get my ...
4
votes
2answers
296 views

Unable to move in first and second gear in VW Polo

I am facing a problem in first and 2nd gear in my VW Polo diesel car. I am unable to move car in these gears, I tried it so many times. So for the time being I used 3rd gear to move the car & ...
1
vote
1answer
256 views

2006 Saturn Ion won't shift into drive but will in reverse

Couple of days ago my 2006 Saturn Ion transmission stopped working. I can put the car into drive but when I hit the gas it just revs up and doesn't actually go anywhere - it will roll though like it's ...
5
votes
0answers
68 views

Mazda 626 1995 automatic won't shift gears

I have a 1995 Mazda 626, 2.0L, automatic transmission. The transmission won't shift. It stays in 3rd gear and won't go into any other gear. The car does drive, but won't change gear out of 3rd. The ...
5
votes
1answer
71 views

Manual transmission noise

What causes a grinding or scratching noise when shifting from 2nd to 3rd Gear on a 2000 Celica GT? I did have my mechanic add some gear oil but was thinking maybe I should have him drain out old ...
71
votes
17answers
114k 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 ...
4
votes
2answers
54 views

Skipping speeds when downshifting

Is it bad to skip speeds when downshifting manually, e.g. from 4th directly down to 2nd etc?
4
votes
0answers
39 views

citroen c5 2007, AL4, noise when on R [closed]

Sometimes when i change to Reverse, there is strange noise from inside of the car, whats possible cause? the transmission is auto, AL4, and the noise is even if i m not moving(brake pedal)
10
votes
3answers
1k views

How does the transmission not strip itself when applying the brake?

Quick question bugging me: Obviously the car moves forward when neither applying the brake nor the accelerator. How does this not damage the transmission when the brake is pressed? I first ...
9
votes
11answers
54k views

Use of Neutral Gear in Automatic Transmission

I am new to driving A/T cars and I am trying to understand the use of Neutral(N) gear. Should I shift my gear from D to N when my car comes to a complete halt on a red light or somewhere else? As per ...
5
votes
2answers
169 views

Why is it that the front of the car lifts up when releasing the clutch?

I don't know much about the inner workings of a car. For driving one, I find that having an rough idea about what the gearbox, engine and clutch do and where they are is often enough. However for the ...
2
votes
1answer
1k views

Transmission Fluid Pump - 2008 Crown Victoria Police Interceptor P71 CVPI

Hi, I have a 2008 Ford Crown Victoria Police Interceptor. My car runs in forward and reverse for a short time (30 seconds to 2 minutes) and produces a loud whine noise. I believe this to be the ...
3
votes
1answer
39 views

Mazda 3 fn4a -el transmission on tune up

A few days ago I tried doing an " tune up" on my car. It had just a transmission fluid replacement(with synthetic fluid) and had a couple of solenoids replaced. I had an oil change less than a month ...
4
votes
1answer
36 views

2004 Honda Civic ex rpm spike and lose acceleration.

I have a 2004 Honda Civic. Sometimes when pushing on the gas at a slow pace around town the rpm jump up and it's difficult to accelerate. Once doing 60 it doesn't appear to do it. Does the ...
6
votes
4answers
8k 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 ...
7
votes
2answers
328 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 ...
2
votes
2answers
307 views

Are BMW automatic transmissions less reliable than manual ones? [closed]

I am considering purchasing a second vehicle and am looking at a 2001 BMW 325i with an automatic transmission; however, I have heard mixed reviews of the automatic transmission in BMWs. Is there any ...
3
votes
1answer
74 views

My car locks lower gears when on high speed, why?

When I'm on say 50 Km/h my first gear is not accesible and second gear is too, 3rd gear however is hard to push in but 4th gear is easy to slip in, why?
4
votes
3answers
1k views

Could a fuse be responsible for my VW Jetta not shifting while in drive?

Issue with my VW Jetta (2001) Automatic transmission, gasoline engine My tail lights were out because of a missing fuse. So in the dark I looked to find a good one to replace it with (of the ones ...
5
votes
3answers
393 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=...
6
votes
1answer
72 views

Car manual says I have to wait a few seconds before shifting to reverse, why?

I am the type to read the owners manual of everything I buy. I am a new driver and I have just read my owner's manual. As the questions says, it's telling me not to instantly shift to revers when I ...
9
votes
1answer
139 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 ...
5
votes
1answer
48 views

1995 Dodge Viper

So my friend is interested in this 1995 Dodge Viper he's seen on a pre-owned showroom and I have some questions that I'd like to ask. What kind of questions related to that specific car should we ...
11
votes
3answers
22k 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 ...
6
votes
1answer
191 views

Weird grinding sound from the gear box

It is not like when you try to shift a manual stick without the clutch. But a lot lighter than that varying in amplitude (louder and lower) and probably is only there when the engine is cold (Because ...
0
votes
0answers
10 views

use SAE80W/90 instead of EP90 [duplicate]

Can I always use SAE80W/90 API GL5 instead of EP90 for my good old Masport lawn mower's gears? I can't get EP90, which the manual asks for, anymore. http://www.supercheapauto.co.nz/online-store/...
9
votes
5answers
109k views

Car shakes when in gear at red light

I bought a '96 Toyota Camry about a month ago. When I first turn the car on and the engine is cold, I can have the car stopped (in gear) and it will not shake. The idle RPMs will be at 1000. After ...
6
votes
1answer
163 views

How come gears don’t normally change in an automatic car?

I know that there is a similar question here, and another one here that asks when an automatic gearbox knows how to change gear, but I want to know exactly how it does that. It was brought to my ...
4
votes
2answers
5k views

Motorcycle gears seem really stiff and hard to shift when cold

So I have noticed that even for a fruther 10 to 15 mins after warm up, the gear lever on my motorcycle (bought brand new - 6 months old) seems really stiff and harder to change. Could this have ...
4
votes
3answers
8k views

Bike is sometimes not wanting to shift into neutral

I have a 1982 Suzuki SP250. The bike "doesn't want" to shift into neutral sometimes. I have to rock it back and forth and shift up and down the gears a for a while before it shifts. I have changed the ...
6
votes
1answer
336 views

What does it mean to have a stiff first gear?

This problem is a small one and it can only occur with manual cars, but I have been curious to find out more about it for a while now. Sometimes, when the car is attempting to pull away from a ...
6
votes
3answers
3k views

What determines when an automatic transmission shifts?

I'm working on developing an automatic bicycle (mostly microcontroller based) and I'd presume I'd be shifting in a similar way to a car. So my question is, what factors does the transmission take into ...
3
votes
2answers
624 views

How to know when automatic-transmission box needs to be changed?

My friend is very odd: this thread about durability comparison between automatic/manual durability meant to him that manual is always better option because you can learn to change the clutch and only ...
8
votes
1answer
420 views

Why did manufacturers go to other than 1:1 transmission ratios?

While reading this question it came to mind: Why did manufacturers start building transmissions without a 1:1 ratio? In the older transmission you'd see the 1:1 ratio all the time, either as the ...
11
votes
1answer
143 views

Why don't cars use Sequential gearboxes?

I have always felt that the Sequential Gearbox configuration is much much faster than a ordinary gearbox used in cars. Why is this design used ? Any advantages? Note: I am aware that racing cars(...
4
votes
1answer
48 views

Acceleration pickup of a car

When I say "Tata Winger can accelerate from 0 to 100 Kmph in nearly 19 to 20 seconds, which is quite good for this class" - how is it measured? Is this by accelerating the car from 0 to 100 kmph on a ...
24
votes
5answers
5k views

What is the technical reason the engineer decided the motorcycle gear pattern as follows?

The gear pattern is selected by clicking a lever with your left foot, and is typically laid out as follows: 6th gear (if applicable) 5th gear 4th gear 3rd gear 2nd gear NEUTRAL 1st gear What ...
4
votes
0answers
96 views

2008 Vw Jetta won't move? Transmission issue!! Help [closed]

I have a 2008 Vw Jetta 2.5l. On the way to work this morning I stopped at a stop sign and when I took off I heard a clunk and had to coast off the road. It is an automatic transmission and I can put ...
8
votes
2answers
80 views

Gear selection on 6 speed box

Hi I have a Peugeot 308 1.6 ehdi with a six speed manual gearbox and have noticed that when selecting first or sixth gear it does not go in smoothly it can be notchy or clunky this is quite annoying ...
6
votes
1answer
226 views

Scania clutch issue with syncromesh gearbox

The clutch of our 124 Scania stopped working properly with the "14 speed" syncromesh gearbox. The first time it happened, it ground instead of smoothly going into reverse (a non-syncro gear), to back ...
5
votes
1answer
62 views

What is meant by the term “gear ratios”?

I don't really understand the idea behind gear ratios. Does this just mean essentially that the gears (cogs) are all different sizes? What specifically does the term "gear ratios" mean?
5
votes
0answers
56 views

Th400 Transmission help

I pulled my Th400 out of my K20 Chevy and I'm in the middle of rebuilding it and I was resembling it and when I went to put the completed gear train assembly in it and the center support assembly gets ...
14
votes
4answers
2k views

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

My 2013 Subauru 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 ...
3
votes
1answer
74 views

What exactly is a gearbox?

You know that gear stick that we all use so much? Well, I know what it does in the sense that I know how to change gear and drive a car with a manual gearbox, but I don't know much more than that. ...
7
votes
2answers
146 views

Yamaha YZ125K 1983 transmission bearings

I'm restoring an engine and am unable to locate 3 gearbox bearings. Identifying mark is either IXO or IKO. It is a needle roller bearing type and sits RHS crank case 1/3rd gear shaft. Mark clearly ...
8
votes
1answer
39 views

I own a 1989 Mercedes 560sec that has rpm surges for no real reason

It happens once or twice a month, I could be doing 60 mph, and its almost redlining at 5000 rpm!. Once the vehicle gets to normal operating temperature, and I turn it off for a few minutes and turn it ...