I have had intermittent trouble--when I try to accelerate, the transmission drops out of gear (that's what it feels like). I lose all drive power, though the engine is still on. I pump the accelerator several times, the tachometer revs, and then the drive power kicks back in. I might happen once in two weeks, or 6 times in 2 days. It is nothing I can reproduce or predict.
I have taken it to Audi twice and they can't seem to find it. They replaced the transmission controller in May but can't find any concrete correllation. Can anyone suggest where to tell the techs to look?
I was having the exact same problem with my 1994 A4 1.8T. Quite dangerous in fact, when the power cuts out in the middle of taking a left turn.... However, the problem was very intermittent.
Well, today, I started up the car - it idled fine but then no drive power at all. Pressing down on the accelerator produced nothing - in drive, neutral or reverse. Had the car towed to Audi - will know soon what they find....
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If you take your Foot off the GAS PEDAL, will it go into the next gear? Transmissions shift by using PRESSURE and Opening the Solenoids Passages.
You may have a Solenoid Problem or a Electrical Issue, Normally if it is shifting out of 1st and going nowhere, I would suspect a Solenoid issue.
You may has also broke the Sun Shell inside the Transmission. This is not a Troubleshooting that I can go very far with you unless I hooked up my scanner but what you need is someone to put a Scan Tool on your Expedition and see what is actually happening. Sorry to give you the Bad news but I think at the minimum, you are looking at dropping your Pan and changing out a Solenoid but you could also have a major rebuild also...
it may be a bad transmission modulator valve located on the side of your transmission,vacum operated. a sudden downshift or forward shift when unexpected is sign of a bad modulator valve or a vacum leak to the transmission.best to shop around for a garage w/references when it comes to transmission work though. check all the vacum lines to your transmision,you need to look on the underneath side of your truck on the side of transmission for a loose or disconnected vacum line on the side of the transmission. when you feel the vacum line,follow it to the top of engine,the vacum line is about 3/8th line,and may be disconnected or losing air. to make this short,when you drive the car,start out in low gear and shift the transmission,manually from 1st to 2nd to 3rd does it do right with no slipping? if it does this right and shifts great manually,the modulator valve on the side of the transmissions bad,or a bad vacum leak in-between.thank you for choosing fixya.com
Unfortunately it sounds like your automatic transmission clutches are worn out but old and dirty oil can also cause this along with a blocked transmission filter, transmission service might get you out of trouble but a transmission specialist would be advisable.
Hello you will need transmission repairs sometimes when a filter and fluid is changed when a scheduled maintenance has not been followed by owners manual you might have trouble as you do believe it or not sometimes when you exceed the suggested service millage you better off just to leave it and do not service or you can experience trouble as you are having.My solution is take your vehicle in to a transmission specialist you will need a hoist to determine the extent of your repair you might have to rebuild your transmission.
How do you know it's bad? There's a lot of things that can happen that will cause the transmission to behave in ways it shouldn't. Is it automatic? If it's not shifting right, it could be a number of things. Is it a manual? There could be a lot of things that cause trouble there. Post more info on what it is and how it's supposedly bad, and we can go from there.