Garage told me problem could be the drive train. What exactly is the drive train?

I would need to hear the noise to make any guess as to what is the cause.source. Sorry.

The control is made by HomeLink. You can find instructions on how to program your specific type of garage door here:

http://www.homelink.com/program

Here are the basic steps for a "Genie" garage door opener:

1. For first time training, press and hold the two outer HomeLink buttons, releasing only when the HomeLink indicator light begins to flash, which may take up to 20 seconds. (Do not perform this step when training the additional HomeLink buttons.)
2. Press the appropriate HomeLink button I, II or III which you want to train and keep holding it until the indicator light starts flashing slowly. Once the indicator light starts flashing slowly, you may release the button. HomeLink is now in "training mode."You will now have 5 minutes to train your hand-held transmitter to the HomeLink transmitter in the bumper.
3. Stand in front of your vehicle with the original hand-held transmitter for the garage door opener (or other device) that you wish to train.The transmitter unit to be trained is located in the bumper about 4 inches to the left of the vehicle's center.
4. Hold the original hand-held transmitter between 0-12 inches from your car's bumper. NOTE: The distance between the hand-held transmitter and the HomeLink transmitter unit in the bumper depends on the system being trained. It may require several attempts at different distances in order to pick up the signal.
5. Now press and hold the button on your original garage door transmitter while keeping your fog lights in view. The fog lights will blink three times to indicate that the training has been successful.NOTE: If the training time exceeds the five minutes, the fog lights blink once. If this happens, you should repeat steps 2 to 5.
6. Press and hold the trained HomeLink button and observe the indicator light.
   • If the indicator light is solid/continuous, training is complete and your device should activate when the HomeLink button is pressed and released.
   • If the indicator light blinks rapidly for 2 seconds and then turns a solid/continuous light, proceed with Steps 7-9 for a rolling code device. A second person may make the following steps easier. Please use a ladder or other device; do not stand on your vehicle to perform the next steps.
7. At the receiver (motorhead unit) in the garage, locate the "learn" or "smart" button (usually near where the hanging antenna wire is attached to the unit). If there is difficulty locating the training button, reference the garage door opener's manual.
8. Press and release the "learn" or "smart" button (the name and color of the button may vary by manufacturer). NOTE: Once the button is pressed, you have approximately 30 seconds to initiate the next step.
9. Return to the vehicle and firmly press and hold the trained HomeLink button for two seconds and release. Repeat the "press/hold/release" sequence up to 3 times to complete the training process.

Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

Then the technician at the garage is not trained properly

Click this help link below to go through troubleshooting the problem:----Check Powertrain message and Safety Mode Reduced Performance on Holden VZ Commodore?http://howtobyme.blogspot.in/2012/02/check-powertrain-message-and-safety.html
-----------Power train drive train message on dash?
http://howtobyme.blogspot.in/2012/02/check-powertrain-warning-light-on.html
-----------check power-train message with orange engine light came on?http://howtobyme.blogspot.in/2012/02/check-power-train-message-with-orange.html
----------This will help.Thanks.

I hope this helps.

Programming the HomeLink Transmitter
Do not use the HomeLink Transmitter with any garage
door opener that does not have the stop and reverse
feature. This includes any garage door opener model
manufactured before April 1, 1982.
Be sure that people and objects are clear of the garage
door you are programming.
It is recommended that a new battery be installed in
your hand-held transmitter for quicker and more
accurate transmission of the radio frequency.
Your vehicle's engine should be turned off while
programming the transmitter. Follow these steps to
program up to three channels:
1. Decide which one of the three channels (one of the
HomeLink buttons) you want to program.
2. Press and hold the desired button on HomeLink
through Step 3.
3. When the HomeLink indicator light begins to blink
slowly (this may take up to 30 seconds), hold the
hand-held transmitter about 1 to 3 inches (3 to 8 cm)
away from HomeLink and then press and hold the
transmit button on the hand-held transmitter.
Continue to hold both buttons until the indicator
light on HomeLink begins to flash rapidly (this may
take up to 90 seconds).
If you have trouble programming HomeLink, make
sure that you have followed the directions exactly as
described and that the battery in the hand-held
transmitter is not weak. If you still cannot program it,
move the hand-held transmitter to the left or right or
forward or backward or flip it upside down. HomeLink
may not work with older garage door openers that do
not meet current Federal Consumer Safety Standards.
If you cannot program the transmitter after repeated
attempts, refer to "Training a Garage Door Opener with
Rolling Codes" later in this section or contact the
manufacturer of HomeLink at 1-800-355-3515,
or on the internet at www.homelink.com.
Be sure to keep the original hand-held transmitter in
case you need to erase and reprogram HomeLink.


Training a Garage Door Opener with a
"Rolling Code" Feature (If Equipped)
If you have not previously programmed the hand-held
transmitter to HomeLink, see "Programming the
HomeLink Transmitter" listed previously. If you have
completed this programming already, you now need to
train the garage door opener motor head unit to
recognize HomeLink.
1. Find the "Learn" or "Smartbutton" on the garage
door opener motor head unit. The exact location and
color will vary by garage door opener brand. If you
have difficulty finding the Learn or Smart button,
refer to your garage door opener owner's manual or
contact the manufacturer of HomeLink at
1-800-355-3515, or on the internet at
www.homelink.com.
Because of the steps involved, it may be helpful
to have another person assist in programming
the transmitter.
2. Press the Learn or Smart button on the garage
door opener motor head unit. An indicator light will
begin to flash when the motor head unit enters the
training mode.
Following this step, you have 30 seconds to
start Step 3.
3. Return to HomeLink in your vehicle and firmly
press and release the programmed HomeLink button
three times.
The rolling-code garage door opener should now
recognize HomeLink. You may either use HomeLink
or the hand-held transmitter to open the garage door.
If after following these instructions, you still have
problems training the garage door opener, contact the
manufacturer of HomeLink at 1-800-355-3515,
or on the internet at www.homelink.com.
www.gmcextendedwarranty.com

Hyundai TSB 08-BE-012

PROCEDURE:
1. For first time training, press and hold the two outer HomeLink buttons, releasing
only when the HomeLink indicator light begins to flash after 20 seconds.
NOTE: Do not perform this step when training the additional HomeLink buttons.
2. Position the hand-held transmitter 1-3 inches away from the HomeLink mirror,
keeping the HomeLink indicator light in view.
3. Using both hands, simultaneously press and hold both the desired HomeLink button
and the hand held transmitter button.
DO NOT release until the HomeLink indicator light flashes slowly and then rapidly.
When the indicator light flashes rapidly, both buttons may be released. The rapid
flashing indicates successful training and the procedure is complete. This also
indicates that the garage door opener does not use rolling code technology.
Note: The garage door may open or close during this step.
Steps 4 through 7 are only necessary if the HomeLink button appears to be
transmitting after step 3, but the garage door does not operate.
4. Press and hold the trained HomeLink button and observe the indicator light.
If the indicator light is solid/continuous, training is complete and your device should
activate when the HomeLink button is pressed and released.
If the indicator light blinks rapidly for 2 seconds and then turns a solid/continuous light,
proceed with the following training instructions for a rolling code device. A second
person may make the following steps quicker and easier. It is recommended that a
ladder or similar device be used to obtain access to the motor housing. Do not stand
on the vehicle to perform the next steps.
5. At the garage door opener receiver (motor housing) in the garage, locate the “learn”
or “smart” button (usually near the hanging antenna wire attached to the unit). If
there is difficulty locating the training button, refer to the garage door opener’s
manual.
6. Press and release the “learn” or “smart” button (the name and color of the button
may vary by manufacturer).
NOTE: Once the button is pressed, there are 30 seconds in which to initiate the
next step.

7. Return to the vehicle and firmly press and hold the trained HomeLink button for two
seconds and release. Repeat the “press/hold/release” sequence up to 3 times to
complete the training process. If successful, your garage door should open or close
during this step.
If the vehicle owner continues to have difficulty programming their HomeLink mirror,
please have them contact HomeLink customer service directly at 1-800-355-3515 or
www.homelink.com for further assistance.
PROCEDURE COMPLETE

Good luck!

In a front wheel drive car the differential (rear end) is connected directly to the transmission with a coupler instead of a driveshaft. Whatever the problem is that they told you about,it will not go away. The more you drive it, the worse it will get. Hope this helps.

ok

Learn Mode
WARNING: A garage door opening system that cannot stop or reverse itself after detecting an object in its path does not meet current federal safety standards. To decrease the risk of serious injury or death, do not use the universal transmitter with a door opening system that lacks stop and reverse features as required by federal standards. This includes any garage door opening system manufactured before April 1, 1982.
CAUTION: During this procedure, the system that you are programming will be made to operate. Make sure that people or objects are clear of the garage door or gate being programmed.

1. Select a universal transmitter button to train.

1. NOTE: If more than one button is pressed, priority will be given to the lowest numbered channel.
   Press and continuously hold the button for 20 seconds. CHANNEL X TRANSMIT will be displayed (X will be 1, 2 or 3) during this time.

1. NOTE: If the channel being trained has not been previously trained, the channel will immediately enter training mode (no 20 second delay).
   After 20 seconds, the display will read CHANNEL X TRAINING to indicate training has started.

1. Point the original garage door opener transmitter at the overhead console. Hold down the original transmitter's transmit button so the overhead console can learn the original transmitter's frequency and data stream.

1. Training will be completed in 100 seconds or less. CHANNEL X TRAINED will be displayed when training is complete. DID NOT TRAIN will be displayed if the channel did not correctly train.

1. NOTE: Additional training may be required for rolling code equipped devices. For additional information, refer to Rolling Code Programming in this section.
   Release the channel X button. Training is complete.

Rolling Code Programming
NOTE: To train a garage door opener (or other rolling code-equipped devices) with the rolling code feature, follow these instructions after completing the learn mode.

1. Locate the learn or smart button on the garage door motor head unit. Exact location and color of the button may vary by product brand. If there is difficulty locating the learn or smart button, refer to the device's Owner's Literature.

1. Press and release the learn or smart button on the garage door motor head unit.

1. NOTE: Following the previous step, there are 30 seconds in which to proceed.
   Press and release the programmed universal transmitter button. Press and release the universal transmitter button a second time to complete the training process. (some garage door openers may require this procedure to be done a third time to complete the training.)

Transmit Mode

1. Select the button for the desired channel (for example, for the garage door you wish to open).

1. NOTE: If more than one button is pressed, priority will be given to the lowest numbered channel.
   Press the button. CHANNEL X TRANSMIT is displayed.

1. The correct signal is transmitted to the device being controlled.

1. Release the button.

Erase Mode

1. Simultaneously press and hold buttons 1 and 3 for 20 seconds.

1. CLEARING CHANNELS will be displayed while the channel codes are being erased.

1. CHANNELS CLEARED will be displayed when the erase operation is complete.

1. Release buttons 1 and 3.

Universal Transmitter Default Code Mode Loading

1. Press and hold buttons 1 and 3 simultaneously. CLEARING CHANNELS is displayed.

1. After 20 seconds, CHANNELS CLEARED is displayed. Continue to hold buttons.

1. After 10 more seconds, CHANNELS DEFAULTED is displayed when the default codes have been successfully loaded

1. For first time training, press and hold the two outer HomeLink buttons, releasing only when the HomeLink indicator light begins to flash after 20 seconds. (Do not perform this step when training the additional HomeLink buttons.) 2. Position the hand-held transmitter 1-3 inches away from the HomeLink surface (located on your visor), keeping the HomeLink indicator light in view.
3. Using both hands, simultaneously press and hold both the desired HomeLink button and hand held transmitter button. DO NOT release until the HomeLink indicator light flashes slowly and then rapidly. When the indicator light flashes rapidly, both buttons may be released. (The rapid flashing indicates successful training.)
Note: Some garage door openers may require you to replace step 3 with the “cycling” procedure noted in the “View Canadian Instructions” section.
4. Press and hold the trained HomeLink button and observe the indicator light.

• If the indicator light is solid/continuous, training is complete and your device should activate when the HomeLink button is pressed and released.
• If the indicator light blinks rapidly for 2 seconds and then turns a solid/continuous light, proceed with the following training instructions for a rolling code device. A second person may make the following steps quicker and easier. Please use a ladder or other device. Do not stand on your vehicle to perform the next steps.

5. At the garage door opener receiver (motorhead unit) in the garage, locate the “learn” or “smart” button (usually near where the hanging antenna wire is attached to the unit). If there is difficulty locating the training button, reference the garage door opener’s manual or contact us. 6. Press and release the “learn” or “smart” button (the name and color of the button may vary by manufacturer). NOTE: Once the button is pressed, there are 30 seconds in which to initiate the next step. 7. Return to the vehicle and firmly press and hold the trained HomeLink button for two seconds and release. Repeat the “press/hold/release” sequence up to 3 times to complete the training process.