Motor Vehicle Maintenance and Repair Stack Exchange
Motor Vehicle Maintenance and Repair Stack Exchange

Questions tagged [automatic-transmission]

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

Automatic Transmission

enter image description here

632 questions
37
votes
3 answers

What's the Purpose of Park on an Automatic Transmission?

When one wants to park a manual transmission (MTX) vehicle, one puts it in neutral, and engages the emergency / parking brake. With an ATX vehicle, the practice I've learned is to put it in Park, and engage the parking brake. But if I need to…
Robert S. Barnes
  • 15,708
  • 69
  • 148
  • 239
18
votes
1 answer

What is a governor and what is it used for?

I was watching a classic car restoration program on YouTube in which they were working on a '50s Cadillac with an automatic transmission. The mechanic in the video diagnosed a transmission glitch as a problem with the "governor" that was sticking…
Zaid
  • 39,111
  • 48
  • 142
  • 290
16
votes
6 answers

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. But someone told me recently that being in neutral…
Michael Myers
  • 265
  • 1
  • 3
  • 10
9
votes
4 answers

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 ?
Andre Holzner
  • 191
  • 1
  • 1
  • 3
9
votes
1 answer

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 conflicting reports of "when a transmission is going…
Robert S. Barnes
  • 15,708
  • 69
  • 148
  • 239
9
votes
1 answer

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 translucent and I'm unsure if it is in the proper…
Jim
  • 91
  • 1
  • 2
7
votes
4 answers

Will a Slight Overfill Harm an Automatic Transmission

I flushed my transmission recently, and I overfilled it slightly, maybe by a 1/2 liter on a transmission that takes about 8 liters. When cold, the fluid is a little over the cold mark, but not up to the hot mark. Will this harm the transmission?
Robert S. Barnes
  • 15,708
  • 69
  • 148
  • 239
6
votes
3 answers

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 only gets up one third of the way going 70 on the…
jtpereyda
  • 325
  • 1
  • 4
  • 13
5
votes
3 answers

Slow auto transmission pickup when really cold - 2015 RAV4 32K miles (Redline D6 fluid)

Many owners of many vehicles report this issue, so am guessing it's not a big problem. The vehicle crawls in reverse or any forward gear until things warm up; normally just a few seconds. ~Thirty seconds has been the longest when it was ~10F outside…
Paul Lockwood
  • 161
  • 1
  • 6
5
votes
1 answer

Motor and radiator problem will there be and damage to motor or anything

Hi guys ive got one question i was looking over this car i was going to buy and there was engine oil in the radiator i ask the guys why it was in there he said he didnt have enough coolant to fill it so he used engine oil so he topped up the…
Mark
  • 231
  • 1
  • 2
  • 3
5
votes
2 answers

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 pressing the brake or hitting the little shift lock on…
DasBeasto
  • 173
  • 1
  • 1
  • 8
5
votes
4 answers

Ford Focus won't rev high when slipping on snow

Why doesn't my 2010 focus allow me gun it when it starts slipping in snow? It makes it impossible to get out of even a tiny bit of snow. My civic never got stuck because I could always just gun it, but my focus never gets above 2k rpm
user239403
  • 51
  • 1
  • 2
4
votes
1 answer

Car shakes when in gear when stopped but not while driving

So I have a 2007 jeep compass and motor runs great, had and shakes in the motor/Trans area for a while. I replaced the spark plugs, air filter and the motor and trans mounts and it helped a little bit. But I'm still getting the shake while stopped…
Ryan
  • 41
  • 1
  • 3
4
votes
1 answer

The purpose of Smart Junction Box in a car

I am doing research about the smart junction box of a car but on the Internet there is nothing that shows its functionality. I am looking to do some research about it and try to improve its functionalities (as a project) My questions are: What is…
Raouâa Dridi
  • 49
  • 1
  • 2
4
votes
1 answer

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 pedal, It feels like the computer thinks I am want to…
rickyjoepr
  • 163
  • 3
1
2 3 4