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

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3
votes
2answers
1k views

Why do cars allow you to shift from Reverse to Neutral/Drive without brakes?

Every automatic transmission car I've driven (not sure if all do this) allow you to shift from Reverse to Neutral and from Neutral to Drive (and therefore Reverse all the way to Drive) without ...
4
votes
1answer
2k views

Does towing an automatic transmision car in neutal with engine not running will damage it?

My daughter had a friend tow her 1996 chevy. automatic transmission without engine running while in "N" SLOWLY for probably 7 or 8 miles distance. Do you think she has damaged the transmission? The ...
5
votes
1answer
10k views

Ford Escape won't shift into gear, O/D light flashing

I've got a 2002 Ford Escape (automatic transmission) that will start fine and reverse without any problems, but when I put it in drive and try to pull forward, it remains in idle. I can hit the gas ...
4
votes
2answers
978 views

Better to repair a CVT or replace with a used one?

Our 2003 Honda Civic Hybrid transmission died. Honda gave us an estimate of $4500 to replace the transmission. We took it to a different mechanic who suggested that instead of replacing the whole ...
0
votes
1answer
300 views

Is starting with my automatic transmission in Neutral a good idea? [closed]

I have bought an auto transmission sedan but have no idea how to drive it correctly. All I know is put to D gear, and just drive. I was wondering, is this the right way to use an automatic gearbox? ...
3
votes
2answers
416 views

2007 Nissan Frontier Transmission, Differential & Transfer Case service intervals for light driving?

According to the owner's manual service/maintenance guide, automatic transmission fluid, differential oil & transfer case oil should be inspected for leaks at the following intervals: ...
1
vote
0answers
237 views

Which is the best / most reliable car automatic gearbox technology for frequent climb mountain [closed]

Today we have in the market so many car with different types of automatic gearbox system, produced by many manufactures, like ZF, Getrag, Aisin... producing from conventional automatic gearbox, to ...
-1
votes
1answer
80 views

Drive no longer works on my Chrysler 300

I have 2006 300 Chrysler v-6 Hemi engine AWD 6 cylinder. I went to start my car this morning, put it in drive, but it wouldn't go. Then I put it in reverse and it would drive back as well as neutral. ...
2
votes
1answer
6k 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 ...
8
votes
4answers
26k 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 ...
3
votes
1answer
263 views

Shifter(auto) stuck in park and override won't work

I have a 2005 Toyota Tacoma TRD that won't shift out of park. I just came back from a 3-month trip and went to drive my truck somewhere but it wouldn't shift out of park. This has happened before as ...
3
votes
1answer
61 views

High idle, not shifting gears - 1995 Mercury Mystique

My friend has a 1995 Mercury Mystique that was suffering from low idle problems (stalling out at stoplights, etc). He replaced the throttle position sensor, and after that the low idle problem was ...
3
votes
1answer
70 views

Can I use Dexron III H for power transmission requiring Dexron IID/III?

I've got a Freelander 1999 2.0L DI. I need to top up some power steering fluid. In the manual it says to use Dexron IID or Dexron III. I'm wondering whether I can use Dexron III H (e.g. Castrol ATF ...
5
votes
1answer
3k views

Grinding Sound at Specific RPM/Speed

I have a 2011 Ram 1500. For about a month I thought I was hearing a clunk between 2nd and 3rd gear. I finally decided to listen carefully by turning my radio off. I now certainly notice it, but it is ...
4
votes
1answer
385 views

What are some signs my transmission is having problems?

I have a 2004 Honda Accord sedan, automatic transmission with about 180k. I wanted to get a second opinion on what I'm observing to see if there's a problem (which I think might be starting) or if ...
4
votes
1answer
844 views

Could too much transmission fluid cause problems?

Is my reasoning here a plausible explanation for the issues described below? Background The CEL on my friend's 2003 Mazda6 lit up yesterday, along with a flashing HOLD light. We hooked it up to a ...
4
votes
0answers
200 views

Engine Running Fast in Park

Never had this issue before but I just started my vehicle and the tac automatically revved up to 1500 rpm when I cranked it. It didn't go back down while in park, it basically idled at about 500 rmp ...
1
vote
1answer
172 views

Toyota Camry 2005 automatic gears won't engage

I have a Toyota Camry 2005, the car was taken to a mechanic for oil change out and according to the mechanic he opened the transmission down plate and remove the valve body and serviced it which I ...
6
votes
1answer
10k views

Push start a car with automatic transmission

Is it possible to push start a car with automatic transmission? Use case: Let's say the battery is dead or you have a bad starter. I know this can be done on manual cars by putting the car in to gear ...
5
votes
4answers
659 views

How easy is it to overfill transmission fluid?

I was helping out a friend yesterday who was facing some issues with a transmission-related CEL on his automatic 2003 Mazda6. When we checked the ATF dipstick the transmission fluid was a clear ...
2
votes
3answers
71 views

What is this thing behind my oilpan and is it bad that it's cracked?

Sorry I can't be more specific. I have no idea what it is and my google-fu has failed me. Here is an image of the part in question. It is in the center of the image and has a large crack in it. ...
3
votes
2answers
472 views

Why does car rumble/shake with light pressure on accelerator?

Have a 2006 Ford Expedition. I had noticed about 6 months ago that every once in a while it would rumble or shake when I was going 45-55 mph and with my foot only lightly on accelerator. Now it ...
3
votes
1answer
55 views

Identify parts I need from a supplier catalog

I'm French and I own an old Volvo V70 car whose automatic gearbox sounds seriously tired. In Europe an specially in France, automatic gearbox is not usual as it may be, say in USA, so it's not easy ...
2
votes
0answers
247 views

(Video) Very Loud Hissing/Spraying Noise, Transmission? [closed]

Ok, very weird situation: 2001 Mitsubishi Montero Loud hissing sound coming out of front passenger wheel well when accelerating. Here is a video: https://youtu.be/tiSFdoniRm0 I have put it in park ...
5
votes
3answers
427 views

Honda FIT GP1 HYBRID 2011 knock

in my auto gear honda fit gp1 hybrid car, (mileage 56 000 KM) I had a engine tune up and changed my injectors (8 injectors) last month and after 2 weeks i started getting a slight knock (jerk or ...
1
vote
0answers
103 views

Compatibility with automatic transmissions between MDMA and M4TA Honda CRV 98

I need to buy an automatic transmissions but only found MDMA automatic transmission for this reason I need to know the compatibility between MDMA and M4TA. Honda CRV 98 4X4 and mi car use M4TA Exist ...
3
votes
0answers
67 views

Changing Ford e4od to 4r100

e4od is a gear driven speed sensor/ 4r100 is reading directly off tail shaft and signal is much faster causing speed to read much faster. Is there a way to put an in-line adjustable type signal ...
2
votes
1answer
54 views

2003 Yukon 5.3 with 278,000

At 70 mph and about 2000 rpm, I have noticed that when i lightly press on the accelerator, the rpm will rise but speed will not increase. i press a little harder and the rpm will come back down to ...
3
votes
2answers
9k views

Reverse Gear Doesn't Work Anymore on an Automatic

I've been having troubles with my automatic transmission for sometime now mainly it's lost it's smoothness and has been slipping first thing in the morning. I've practically worked on every other ...
2
votes
3answers
185 views

Vehicle squeaking 3-4 times when beginning to drive. Stops after getting some speed

Recently I've noticed that my 2012 Nissan Frontier (Automatic Transmission) is squeaking when I start driving from a complete stop. It will only squeak 3-4 times and will go away once I've gained some ...
2
votes
2answers
2k views

Pressing on gas and brake at the same time by mistake - How harmful is it to the gearbox?

I usually brake with my left foot when driving a car with automatic transmission. I find it easy to switch between right-foot and left-foot braking if needed (for example, if I need to drive a car ...
4
votes
3answers
46k 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 ...
3
votes
3answers
414 views

Safe engine braking in automatic cars

When I was learning to drive, I took my lessons in a manual car. On one of the lessons I was performing a reversing maneuver and I controlled the car on both the clutch and the brake pedal... which I ...
5
votes
1answer
289 views

How to Detect a Bad Transmission When Buying a High Mileage Vehicle

Rebuilding a transmission is one of the most expensive things that can be done on a car and I've been told it's one of the main reasons people dump cars other than timing belt issues. I've read ...
2
votes
1answer
68 views

How Difficult / Expensive is it to Swap An Automatic Transmission?

Let's say you are thinking of getting a car cheap due to it having a spotty automatic transmission. How difficult / expensive would it typically be to get a low mileage second hand transmission from ...
1
vote
2answers
672 views

Transmission fluid leak 1993 5.0 V8 F150 Engine

When I add transmission fluid, it leaks out below. It looks like it is collecting around the pan, but also forward. I am asking to see if someone thinks changing the pan won't cover the leak. ...
2
votes
1answer
81 views

Volkswagen Passat went out of control

It was raining, and I was on a Motor Way, driving at about 100 mph and approaching 110. It was an automatic Volkswagen Passat, 12K miles old. The car started behaving weirdly, and it started shaking ...
3
votes
0answers
316 views

1992 Mitsubishi 3000gt sl. no power and won't go above 2k rpm

I bought an automatic 1992 Mitsubishi 3000gt sl 2 days ago. I got it cheap knowing it would have problems, and that's why I'm here. When I put it in drive and slam on the gas the car just simply ...
3
votes
1answer
461 views

2005 Scion TC Automatic Skips Drive and goes to 3rd

2005 Scion TC automatic transmission never actually goes into D (drive), but goes right into 3 even though the gear shift lever is in the D position. The P R N D 3 2 L indicator on the dashboard has ...
12
votes
1answer
10k 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 ...
6
votes
2answers
3k views

What is the difference between an automatic and an AMT

I have seen many recent car launches in my home country which claim to have something called as an AMT or Automated Manual Transmission. I am curious to know how is this different from a traditional ...
1
vote
1answer
142 views

Volvo S60 T5 Auto gearbox replacement

My Volvo S60 T5's gearbox (aw55-50sn) has finally broken; it has a slipping third gear and possible clogged up solenoids in the valve body (due to it clonking into "D" mode). I'm wondering if there's ...
5
votes
1answer
1k 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 ...
2
votes
2answers
410 views

What is the best way to determine if my hydraulic motor mounts are bad?

I am experiencing delayed forward movement at take off. I apply the accelerator nothing happens until it jolts forward. When I stop it lunges forward, which leads me to believe it is the motor mounts. ...
1
vote
1answer
489 views

Transmission won't shift into second after rebuild

I have a 94 Pontiac Firebird with a 4L60E automatic transmission. I bought a transmission rebuild kit and installed everything right, but it's not shifting into second the way it should. Everything in ...
1
vote
1answer
1k views

Is it bad to switch gears to D while my car is still moving backwards

I am reversing. While the car is still moving backwards, I switch gears from R to D, and press the accelerator to start moving forward. After a bit the car stops going backward, and starts moving ...
4
votes
1answer
626 views

At a complete stop, why is my RPM in Neutral gear greater than Drive gear?

I always assumed that my engine would do less work in N (neutral) than in D (drive). However, I tried a little experiment. My car wasn't moving, my foot is on the brake, and I have in D. I then switch ...
3
votes
0answers
242 views

Signs of a bad transmission?

I have a 2004 Subaru Legacy L Sedan Automatic. I've been starting to notice in the past few months that the transmission is shifting strange, typically either when the car first starts up, or has been ...
3
votes
1answer
98 views

Surely I'm refilling my transmission fluid incorrectly

My car ('96 Ford Taurus) developed a transmission fluid leak and lost an unknown amount of fluid. I fixed the leak and began replacing transmission fluid but this has proved to be extremely tedious. ...
2
votes
1answer
628 views

2004 LEXUS GX470

I have a 2004 Lexus GX470. I am having this problem where as I accelerate, my RPM goes up to like 5/6 and my speed is not going up. If I back off the pedal and try again it sometimes will ...