Questions regarding automatic gearboxes, and associated parts such as torque converters

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13
votes
2answers
4k views

Why doesn't the engine stall out when you come to a stop with an automatic transmission?

When you come to a stop with a manual transmission you have to push the clutch in or take it out of gear to keep the engine from stalling out. What keeps the engine from stalling in an automatic ...
3
votes
1answer
92 views

Is my transmission about to go?

I drive a 16 year old Subaru Legacy automatic which still has its original transmission and has never given me a moment's trouble in 16 years. Today while pulling out of a parking spot, I suddenly ...
4
votes
2answers
657 views

Saab 9-3 stuttering and cutting out [closed]

I've got a 1999 Saab 9-3 2.0l Automatic (not the turbo). It's been running fine, then a bit more than a month ago it started to stutter when accelerating or decelerating. Only occasionally, but it ...
2
votes
2answers
319 views

2001 Honda Civic LX won't stay in 4th gear

I have a 2001 Honda Civic LX, automatic transmission. There are 3 gear settings: 2, D3, and D. If I'm driving in D3 and shift into D, I can feel it shift gears up (from 3 to 4), but then it ...
3
votes
2answers
2k 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 ...
1
vote
2answers
187 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 ...
3
votes
1answer
373 views

Howling sound when accelerating

I have a 2007 Ford Ranger that makes a faint howling sound when I'm accelerating, usually after being idle at a stoplight. I've tried slowly revving in neutral and I didn't hear the same noise. ...
1
vote
1answer
132 views

Automatic Micra moving on its own & idle speed

Just bought a used Nissan Micra (automatic transmission). When I depress the brake and change into D or R to move off, and then let go of the brake, the car starts moving off slowly. Only had one ...
0
votes
2answers
311 views

Is changing gear to `Neutral` at all possible times a bad practice? [duplicate]

In a Automatic Transmission vehicle, changing gear to Neutral at all possible times like, before breaking for stopping for a color light or driving downhill will save the fuel in a considerable ...
2
votes
1answer
527 views

2003 Honda CR-V AWD - intermittently Flashing Drive light

My Wife's 2003 Honda CR-V's Drive light in the cluster occasionally starts flashing. The manual states that this means that the transmission requires service, but it doesn't do it all the time, and ...
3
votes
4answers
1k views

Does switching to neutral on an automatic transmission improve braking for immediate stopping?

I've been told that when needing to brake quickly, throwing the gear into neutral on an automatic transmission actually allows for better/quicker braking. I understand how things work pretty well but ...
1
vote
2answers
577 views

How does a belt drive CVT variator work?

The title basically says it all, but I am the most interested in what the rollers actually do?
3
votes
0answers
144 views

Pulley Difference After Drive Belt Change

I have one worry after yesterday's fairly difficult but successful drive belt change on my Big Boy scooter. The main nut on the fron pulley now goes on much less further than before it came off. I ...
5
votes
2answers
1k views

How to put 1997 Toyota 4Runner in neutral with dead battery?

My ’97 Toyota 4Runner with automatic transmission is parked head first in a small garage with a dead battery. I need to put it into neutral to push it out on the driveway so I can jump-start it. (This ...
1
vote
1answer
846 views

What does PRNDSB means?

My Daihatsu Mira does not have any manual, Its an automatic car with TurboEngine and Gear with PRNDSB. What does all these means? My car is four wheel drive as I can see rear differential in it. If ...
1
vote
1answer
271 views

how to find if a car can drive on hills easily or not?

I have a Daihatsu Mira car with 650cc, it has a Turbo Engine with an automatic gearbox. I want to go to a hill station but not sure that this car can drive there easily or not. I want to go to a point ...
4
votes
1answer
565 views

Remove transmission cooler lines K1500 '00

What is the trick from removing the cooler lines from the transmission on my 2000 k1500? I know how to disconnect the lines. I just don't know how to reach the clip on the lower connection on the ...
5
votes
4answers
9k views

Can I use a Dexron III automatic transmission/power steering fluid where a Dexron II is required ?

more generally speaking are 'higher Dexron numbers' also fulfilling the specifications of the lower number fluids ?
3
votes
0answers
426 views

2004 Chevy Malibu jerks when deceleration is followed by acceleration between 25-40 mph

I recently noticed that when coasting or breaking is followed by acceleration (seems to be only when the car is moving between 25 and 40 mph) that there is a slight jerk. After recreating the problem ...
3
votes
1answer
808 views

2006 Audi A4 2.0T, No passing power

I have a 2006 Audi A4 2.0T Turbo Tiptronic Automatic that has no passing power. When I step on the accelerator the car will shift down into a lower gear, rev about 3500 RPMs but will not shift up ...
13
votes
4answers
52k views

What's the point of the D3 gear in an automatic transmission?

My Honda Civic has a D gear and a D3, which apparently prevents it from going into 4th. Why would I want to do this? What is it good for? Does it make my fuel efficiency better or worse? Does it ...
1
vote
1answer
570 views

Manually shifting an automatic transmission?

My car has been rather sluggish lately - both ABS and TCS lights are on, which means there is a sensor error somewhere. I haven't had the time to look for and fix said error, but I have had to drive ...
1
vote
0answers
82 views

How can I rev my engine in drive while holding the brake and not stall? [duplicate]

Possible Duplicate: Why doesn't the engine stall out when you come to a stop with an automatic transmission? Occasionally I press both pedals simultaneously. I can feel my car trying to ...
1
vote
1answer
404 views

Differential Fluid Plug Right Above Catalytic Converter? - '99 Avalon XLS

Recently I was doing some routine maintenance on my 1999 Toyota Avalon XLS and when I was checking the 95k mileage procedures one of the items which caught my eye was replacing the differential fluid. ...
4
votes
1answer
233 views

What to do when a mechanic can't reproduce possible transmission problems?

I have limited experience with cars. I bought a 2001 Mazda 626 to commute to and from school a few weeks ago. Today when merging on the freeway I noticed that the engine sounded like it was working ...
2
votes
1answer
2k views

Auto transmission shifting late, staying in low gear

The mother-in-law's 2005 Renault Clio (auto) shifts very late and stays in too low a gear. When decelerating the tranny downshifts early (it really likes the revs). The garages all want a heafty sum ...
1
vote
1answer
401 views

Automatic trasmission gear lock when accelerating

For awhile now since getting my first car (and only driving Automatic transmissions) I've had plenty of experiences where when making a turn out of a parking lot with my wheels turned a bit too much, ...
2
votes
1answer
2k views

Engine Coolant Temperature sensor goes bad whenever the outside temperature is hot

This is on a 1998 Chevy Cavalier, automatic transaxle, 2.2L. This sensor went bad last July and I replaced it then. When it goes bad, the check engine light comes on and then the temperature gauge ...
1
vote
1answer
2k views

Why is my car hesitating to accelerate only when I first start my car?

I've got a 1999 toyota corolla with over 170K miles, and I've had my fair share of problems over the years. Currently, I have this problem that my car seems to hesitate accelerating when I first ...
1
vote
2answers
117 views

Can anyone identify the problem?

I just broke down. Here's a description: ('97 Subaru Legacy) Driving completely normally along a town road, the car suddenly began to sputter and jump as I pressed on the gas. Then the check engine ...
1
vote
1answer
235 views

97 Bonneville, strange problems accelerating

I'll try to explain this problem as clearly as possible. I have a 97 Bonneville, automatic transmission. When accelerating from idle, sometimes two strange things happen: the car reaches ~20 mph, ...
7
votes
1answer
3k views

How does an automatic gearbox know when to change gear

As the title suggests, how does an automatic gearbox know when to change gear, for example, how does the autobox know to shift down when you hit a gradient for example, also how does it know to shift ...
1
vote
1answer
835 views

Should I change automatic transmission fluid on an older vehicle?

I have a Pontiac Vibe 2004 with an automatic transmission. The mileage now is around 120k miles and I've never changed the transmission fluid. There are no mechanical problems with the vehicle at the ...
1
vote
1answer
86 views

Cost to alter the transmission system

How expensive would it be to replace a manual transmission system to an automatic?
0
votes
1answer
92 views

Trying to diagnose from this sound when accelerating

I have a '96 Holden Apollo, automatic, that has a point when accelerating where it sounds like its revving up a bit higher and seems like the gears might not be really gripping. Thats my uneducated ...
3
votes
1answer
291 views

How to fix an electronic transmission that chooses overdrive and torque converter lock

'95 BMW 540i Automatic If I drive for a short (5 min) trip say go in to a store and come out. The engine will start and idle fine, but upon gear selection the car will try to drive through the brakes ...
3
votes
1answer
1k views

2004 Mazda 3 - clank when shifting into reverse

Every morning, or after the car has sat for a while, there is a loud clank from the engine area when I shift it into reverse. Sometimes I hear the same clank when shifting into drive, but not always. ...
1
vote
1answer
4k views

Best way to diagnose and fix a shifter that sticks in park?

I have a 1997 Caravan [short wheelbase, base model] with a 4-speed automatic transmission. After it sits [off] for a few hours, the shifter will get stuck in park. A little jiggling and a hard pull ...
6
votes
1answer
855 views

How can I be sure of the reading on my automatic transmission fluid dipstick?

This may seem like a silly question. I've been trying to read the dipstick for my automatic transmission fluid but am having a very difficult time determining the level. The fluid is very light and ...
7
votes
1answer
428 views

I'm stupid and added tranny fluid to my coolant tank. What can I expect?

Title pretty much says it all. I'm a computer guy, not a car guy. I saw a bunch of red fluid coming out of my vehcile, assumed it was tranny fluid. Turns out it was antifreeze. This means the bit of ...
2
votes
1answer
168 views

when parked on uphill, it's difficult to engage any other gears on my automatic chevy 2004 impala.

when the car is parked on uphill, and I try to move the gear back on to reverse, it becomes extremely difficult. Like you have to put a little effort into it. Once it gets into gear, it makes a loud ...