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

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4
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2answers
3k views

Do I need computer reprogramming when transmission is replaced?

Honda Odyssey 2003: I'm replacing a transmission, and a local mechanic will help me to swap it in my garage. I've been told at a local shop, that in order to install remanufactured transmission ...
4
votes
1answer
54 views

Automatic Transmission - Reverse Flush, what is this procedure and why is it dangerous?

I recently, moments ago, saw in a post a mention of a reverse flush in reference to an automatic transmission fluid change. The responder mention the dangers of a reverse flush and that many of the ...
4
votes
1answer
23 views

Odd Transmission slip

My transmission gets these odd slips every once in a while. For example, today I was driving slow through town, I believe in second gear, and my foot was very light on the pedal. As I release the ...
4
votes
1answer
18 views

How does PCS on 4l60e work?

Looking at the pinout for the connector for the 4l60e there are 2 pins for the pressure control solenoid. 1 pin for HIGH, and 1 pin for LOW. Does this mean the PCS can only ever be in 1 of 2 ...
4
votes
1answer
426 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 ...
4
votes
1answer
879 views

2012 Toyota Tacoma won't shift into Reverse

I've just had my 2012 Tacoma towed to the dealership due to the truck not shifting into reverse correctly. I first noticed a problem when I was driving home and the RPMs would get up to between 3 and ...
4
votes
1answer
323 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 ...
4
votes
1answer
502 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
1answer
25 views

1994 Silverado not accelerating past 35

I have a 1994 Chevy Silverado. On my way to work today my truck would not accelerate past 35 mph but was revving high rpm's. I stopped and checked my fluids and my ATF wasnt showing anything on the ...
4
votes
1answer
65 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 ...
4
votes
1answer
66 views

2004 Ford Explorer accelerates too quickly from idle

I have a 2004 Explorer/v8/4wd/bauer edition. When I take off from a stop, there is a slight lag and then the vehicle over accelerates (sort of "jumps" off the line). If I gradually apply the ...
4
votes
1answer
64 views

1999 Mazda 626 Auto Transmission Starts in 2nd, wont shift past 3rd

My wife has a 1999 Mazda 626 that had the transmission rebuilt 5 or 6 years ago. Recently the car started having problems starting unless it was shifted in to neutral. I replaced the neutral safety ...
4
votes
1answer
123 views

2002 Subaru Legacy, Grinding Sound

Just got home from work and put my car into park and heard a grinding sound. The parking brake stopped working. I tried putting it into drive and got the same grinding sound. It was as if something ...
4
votes
3answers
992 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 ...
4
votes
1answer
1k 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 ...
4
votes
1answer
1k 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 ...
4
votes
2answers
1k 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 ...
4
votes
1answer
1k views

2001 Mercury Sable — Rough Idle/High RPM and Transmission Leaks

I have a 2001 Mercury Sable (24V DOHC V6) that has been having problems with its vacuum system. I live in Florida where the average temperature lately has been in the 80s. For roughly a month now, ...
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votes
5answers
3k 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 ...
3
votes
2answers
898 views

Difference between “dumping the clutch” and N->D in an auto?

What's the difference between dumping the clutch, and going from N->D at high RPMs with an automatic transmission? Will this cause any damage to the vehicle?
3
votes
1answer
135 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 ...
3
votes
2answers
470 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 ...
3
votes
2answers
531 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
364 views

Handbrake Engaged for 9-10 km Driving Roughly 80 km/h

Make: Mitsubishi Model: Pajero Intercooler 2800 Handling: Automatic Year: 1992 I forgot to release the handbrake on my car this morning. I didn't realize I forgot to release it until I had driven ...
3
votes
2answers
321 views

Automatic & manual transmission

I read the following: Automatic transmission uses torque converter and planetary gears, while manual transmission uses clutch and a gear box. In automatic transmission, computer and hydraulics ...
3
votes
1answer
682 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
35 views

Mazda 3 2011 1.6 Lts Gasoline - ECU

I was wondering if its possible for a Mazda 3 2011 AT car to function without ECU? The reason I am asking is When I start the engine, the CheckEngineLight doesnot come at all When I took my car for ...
3
votes
1answer
40 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 ...
3
votes
2answers
3k 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 ...
3
votes
4answers
1k views

RPM jumps up & back down at 40mph

My question is for a 2006 Dodge Magnum, 2.7 liter engine. Just over the past month or so, I noticed when I'm cruisung, just coming from a dead stop, when I'm at 40 mph my car kinda feels like it ...
3
votes
1answer
108 views

AWD truck doesn't shift smoothly. I was advised to not change the transmission fluid

AWD Mercury Mountaineer. 1997 Automatic transmission. 8 cylinder 5.0L 150k miles. fairly good shape. Pretty awesome truck. From 1st to 2nd gear, the transmission shifts with a light clunk. Also, at ...
3
votes
1answer
79 views

Transmission sometimes downshifts forcefully with a clunk when I let off the gas 2003 Dodge Grand Caravan

As the title mentions, I have a 2003 Dodge Grand Caravan, and my transmission sometimes downshifts forcefully with a clunk when I let off the gas. It will do this no matter what gear I'm in (except ...
3
votes
1answer
151 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
83 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. ...
3
votes
1answer
902 views

Flat Tow Subaru Auto Trans with Engine Running?

A year ago I traded my 2012 Ford Focus for a 2014 Subaru Outback 2.5i Premium (automatic transmission). Dealer told me it could be flat towed, made sense to me, why not so long as it is in neutral? ...
3
votes
1answer
190 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 ...
3
votes
1answer
47 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
293 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 ...
3
votes
2answers
376 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
2answers
334 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: ...
3
votes
1answer
1k 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. ...
3
votes
1answer
292 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 ...
3
votes
1answer
2k 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. ...
3
votes
1answer
314 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
0answers
114 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 ...
3
votes
1answer
50 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 ...
3
votes
0answers
193 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
0answers
58 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 ...
3
votes
0answers
267 views

Possible transmission fluid leak

2001 Toyota 4Runner SR5 265K miles. I haven't driven it in 2 days and came out and found a small pool (about 2 teaspoons at the most) underneath the engine area. It's clear with a tinge of red, no ...
3
votes
0answers
260 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 ...