I have an Audi A4 1.8T that is having transmission trouble I think. Every time I accelerate the car shudders and shakes feels like Im on 3 wheels. Can someone help me to solve this problem. Its a great car but Im not sure if I can afford to have the transmission work done professionally so I am trying my hand at it first.
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The first thing to do is have the transmission fluid changed, the shudder is clutch plate shudder in the clutch apply pack. When the fluid gets worn from use the chemicals that prevent this wear out after 1000's of miles. The transmission should have a fluid and filter at least every 60,000 miles, more under severe use like extremely hot climates or heavy loading.
it sounds like you have worn engine or transmission mounts. if it was friction from the transmission it would happen anytime you accelerate, not just from a stop. place rubber or wood stops in front and behind the front wheels, pull the e-brake. now have someone hold the brake pedal and start the car. have them put the car in gear and rev the engine, making sure the car doesnt move. while revving the engine, look at the position of the engine and how much it shifts around from its initial position. excessive movement of the engine indicates a worn or loose mount. this will also affect acceleration from a stop. what you are experiencing is the weight of the car catching up with movement of the engine. once they come together, the shuddering stops.
SOUND LIKE TRANSMISSION SLIPPING. CHECK TRANSMISSION FLUID LEVEL.IF FLUID LEVEL OKAY BUT FLUID LOOKS DARK SMELL BURNT.CHANGE TRANSMISSION FLUID AND FILTER ADD SOME VALVE BODY TREATMENT TO LOOSEN STICKEN SHIFT VALVES.ADD TO TRANSMISSION FLUID DONT OVER FILL TRANSMISSION WILL CAUSE OVERHEAT. IF TRANSMISSION FLUID GOOD FILTER ALREADY BEEN CHANGED.IF ALL GOOD ENGINE BEEN TUNED UP OTHER POSSIBLE CAUSES FOR TRANSMISSION SLIPPING NOT GOING TO OVER DRIVE COULD BE THROTTLE SHIFT CABLE OUT ADJUSTMENT OR STRETCHED. TORQUE CONVERTER FAULTY OR SHIFT VALVES TO TORQUE CONVERTER OR OVER DRIVE STUCK IN VALVE BODY. VALVE BODY FAULTY. AND HAVE VECHICLE SCANNED FOR FAULTY VECHICLE SPEED SENSOR OR FAULTY THROTTLE CONTROL MODULE OR FAULTY THROTTLE POSITION SENSOR. THEY WILL EFFECT TRANSMISSION SHIFT TO OVER DRIVE IF FAULTY.
Yes, it's a torque convertor shudder. Flush your transmission fluid and add an additive to help shudder (shudder fix, etc). That fixes most of the vehicle, the others will need a convertor. Try to keep transmission serviced around every 30k will help this concern.
I had a similar problem on my 93 Accord after I accidentally threw the car in reverse at 50 mph, obviously wrecking the transmission. When I got it rebuilt I was told the transmission pump was to blame (clogged with "shrapnel"). I, and your car manual, recommend taking the car in to get the tranny looked at. Especially considering you just had the fluid changed which is what would normally cause the problems you are describing.