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

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4
votes
2answers
611 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
1answer
534 views

2006 Cobalt SS - Traction Control Light & Hard Shifting

I drive a 2006 Cobalt SS (not supercharged) with the 2.4L engine. In the last month or so the traction control light has been coming on periodically. Turning the engine off and back on causes the ...
6
votes
5answers
6k 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 ...
3
votes
0answers
389 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 ...
1
vote
1answer
519 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 ...
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 ...
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 ...
4
votes
1answer
214 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 ...
3
votes
3answers
6k 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 ...
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
114 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 ...
2
votes
1answer
410 views

Faulty TCC solenoid or bad computer?

Make: Pontiac Model: Sunfire Year: 2001 Engine: 2.2 L Trans: Automatic Hello to every one, bought my first car and it is fine except for this little annoying problem. After driving it for a ...
7
votes
1answer
2k 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
220 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, ...
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 ...
2
votes
3answers
1k views

1997 Olds 88, trans issue?

A friend of mine pointed me this way due to my current problems; I've been working on this for three weeks and am no closer to diagnosing the issue, so hopefully someone here can point me in the right ...
1
vote
1answer
787 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 ...
3
votes
1answer
759 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 ...
1
vote
1answer
84 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 ...
1
vote
1answer
391 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. ...
3
votes
5answers
1k views

Should you change all of your transmission fluid?

I took my Lexus RX 300 to the shop, to change the transmission fluid. While talking to the tech, he said he sucked out half the fluid and left the other old half there. Is this proper? Shouldn't they ...
4
votes
3answers
8k views

What is ECT Mode for? - Toyota Cars?

I'm not sure if this is a feature on Toyota cars alone, but I currently drive a '99 Avalon XLS and in addition to the D3 mode which I know disables overdrive, right above the radio near the top of ...
1
vote
1answer
365 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, ...
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
797 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 ...
3
votes
1answer
286 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 ...
4
votes
2answers
704 views

How hot is “HOT” on a transmission fluid (ATF) dip stick?

I want to add some fluid additive (Lucas) to my transmission, but I don't want to overfill it. The dipstick has add, warm, and hot for measuring. So how hot is the hot level? My temperature gauge ...
7
votes
8answers
8k views

Can coasting in neutral damage an automatic transmission?

When I drove a manual transmission, I got in the habit of shifting to neutral on long, shallow grades to save fuel. Now I'm driving an automatic (specifically, a recent Corolla) and still doing it. ...
7
votes
1answer
419 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 ...
24
votes
3answers
12k views

Is there a way to put Prius with dead battery into neutral?

I own a 2010 Prius. It has a dead battery, front facing forward in my garage. I do not have long enough jumper cables. I’ve searched the Internet. Did Toyota really create a car that cannot be put ...
2
votes
1answer
163 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 ...
5
votes
4answers
8k 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 ?
12
votes
4answers
46k 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 ...