Questions tagged [transmission]

These are questions regarding transmissions in general (either manual, automatic or CVT transaxles and their component parts). This tag is not for questions specific to any type of transmission. Instead, use [manual-transmission], [automatic-transmission], or [cvt-transmission] INSTEAD. Use this tag if the question is relevant to multiple types of transmissions.

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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 ...
13
votes
5answers
175k views

Automatic transmission: Is shifting to neutral while approaching stops bad?

This is not with the intention of saving fuel (as I have seen many answers assuming savings in fuel while doing this). But I have this habit of putting the vehicle into neutral before approaching ...
32
votes
6answers
25k views

Why is a motorcycle's neutral between first and second gears?

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 is ...
8
votes
3answers
12k views

Engine braking with an automatic transmission

For reference, I've reviewed these three questions: Manually shifting an automatic transmission? Does Downshifting (Engine Braking) Cause Extra Wear and Tear? Is engine braking harmful? I drive a (...
7
votes
3answers
3k views

Is Redline Lightweight Shockproof appropriate for an aging 2004 Subaru Impreza manual gearbox?

I have an aging (but wonderful) 2004 Subaru Impreza WRX with a manual gearbox. For some time, I have noticed that the synchros have begun to feel worn with the stock dealer-issue oil. Shifts are ...
16
votes
11answers
140k 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 ...
3
votes
3answers
2k views

Engine spikes to 5000 rpm when pressing on gas pedal or going uphill

I'm having an issue with my 2001 Solara, and I would like to check out a few things myself before I have a mechanic spend lots of time diagnosing the problem. When the engine is under load -- I press ...
1
vote
0answers
38 views

Automatic Tranmission Whine when in Gear

In the last month, my 1.3L 2001 Toyota Yaris/ Echo automatic car has developed this dragging whining noise when the car is in gear. I have made a video of it https://www.youtube.com/watch?v=...
1
vote
1answer
60 views

Poor Uphill acceleration and skipping gears

I have a Honda CBF125cc 2010 model. I have recently tightened the chain and changed the sprockets. In the last couple of weeks my bike seems to skip 4th gear. I can physically move the gear shifter ...
0
votes
2answers
287 views

Please help me to choose a proper Automatic Transmission Fluid

My car has a Aisin 81-40LE(Toyota U440e) 4-Speed Automatic Transmission. I want to change ATF, can i use multi-Vehicle ATF's like "Aisin ATF Plus"? Also can i mix new fluid with old? Can we use Multi-...
10
votes
9answers
43k 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 ...
2
votes
1answer
1k views

In a manual car, does changing gear quickly put more wear on the synchro's?

I have a ford fiesta with a manual transmission, and often when I'm driving gently, I'll take more than a second or so to change gear after I depress the clutch pedal. I press the clutch pedal, slowly ...
16
votes
4answers
10k views

Is downshifting on hills harmful for non-trucks? [duplicate]

Possible Duplicate: Does Downshifting (Engine Braking) Cause Extra Wear and Tear? Since the days of taking drivers ed (many years back). I was told that when you encounter a steep or extended ...
6
votes
2answers
297 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 ...
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 ...
9
votes
0answers
374 views

Torque convertor shudder? [closed]

I drive a 2011 GMC Sierra 2500HD ex-cab 2wheel drive with a 6.0 gas engine and a six speed 6L90 automatic transmission. I have started noticing what I believe is called "shudder" from my tranny under ...
9
votes
3answers
604 views

Switching gears without clutch

I drove manual car for a long time but never tried to switch gears without clutch. Question: given that clutch-less shift is executed properly, does it take a toll on transmission in any way? For ...
8
votes
2answers
3k views

How to measure transmission fluid levels?

I understand the newer Audi A3's with either type of transmission (auto or DSG) has a really weird way to check (to normal pull the dipstick type checking) the transmission fluid. Can someone please ...
7
votes
1answer
2k views

Clutchless Downshifts Using Throttle Blip on a Motorbike/Sequential Gearbox

This is with respect to non synchromesh, sequential transmission. Ducati along with several after market systems, implement clutchless downshifts by automatically applying a slight throttle to unload ...
6
votes
1answer
21k 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 ...
6
votes
2answers
320 views

Banging sounds coming in front of my car

I'm having a banging sounds coming from the front of my car. Usually they appear after 5-10 meters when I'm driving. It's like one small knock and then around 5-6 more knocks and then they stop until ...
5
votes
2answers
2k views

Why couldn't I shift into 1st gear with car not stopped in my Renault, but my Volvo lets me do it?

I used to have a Renault Laguna (model year 2000) until I got a Volvo V70 (model year 2006) to replace it. One of the things that annoyed me somewhat about the Renault was that, if I was e.g. ...
4
votes
1answer
612 views

Gearbox impact of skipping gears driving downwards

I have a driving habit that i guess is harmless to the vehicle, and i want to hear your opinions on the matter. Sometimes i change the gears, for example, 1st then 3rd then 5th, when i am driving ...
4
votes
1answer
9k views

How does a AMT (Automated Manual Transmission) work?

I know that a TCU automates the operation of the clutch. But I'm clueless on how an AMT can do anything a human does using a manual. 1)If you are stopped at a hill. When pulling off, a driver brings ...
3
votes
1answer
7k views

How to add transmission fluid with no dipstick?

I have a 2003 chevy cavalier, and just replaced the radiator due to a transmission fluid leak into the antifreeze. I don't know how much fluid was lost because the transmission was designed without a ...
3
votes
2answers
637 views

Engine revs without much acceleration

In my Toyota Vitz 2007 (automatic transmission), I have facing a problem for about a week now. The problem is, sometimes when I press the accelerator, engine revs up but car does not accelerate much. ...
3
votes
2answers
603 views

Why does using the low range of a 4WD transmission give better acceleration?

If I my 2007 Forester transmission into its low range, which has a ratio of 1.6 I think, it will accelerate faster (eg. From 0 to 100 km / h). Why is this? below is a picture.
3
votes
3answers
4k views

Should I put my (UK) Automatic into Neutral at stops?

I have a Vauxhall diesel automatic with electronic handbrake. Which of the following is the best procedure at a red light? Leave in drive, foot on brake Leave in drive, engage handbrake Place in ...
2
votes
1answer
2k views

1997 Chevy Blazer with 4.3: Transmission fluid overfilled by the shop, now it's leaking. Is it from an overflow vent?

Title pretty much says it all, but here's the background: I had my 1997 Blazer (4.3) in the shop to fix an oil leak. They identified the leak as a small hole in the oil cooler lines and replaced them....
1
vote
0answers
271 views

High rpm on neutral but flatting the gas pedal while on D doesn't increase the rpm

Lately and before this problem occurs I have started hearing some noises when the rpm gets to 3k ~ 4k when accelerating on the first gear, my car is automatic but I hear that noise only when starting ...
1
vote
3answers
12k views

I have 5th gear issue , can i drive in 4th gear at 100km to 115km?

My car scares me while changing gear from 4th to 5th gear because it goes to 3rd gear. As a result on highways i get scared to change to 5th gear. Can i drive my car in 4th gear at speed range ...
0
votes
1answer
801 views

Strange ticking noise on Golf Mk5 1.9 TDI

I own a VW Golf Mk5 1.9 TDI year 2005. There is a strange ticking noise coming somewhere from under the hood and as it seems it starts and is mostly noticeable when I press on the clutch. This noise ...