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How to Repair a Car Transmission

A car transmission is used to shift the gears. It will determine rather the car will go fast or even move at all. If the transmission starts to shift weird or slip, this is a sign it could need repaired or replaced  in the future. Learn how to repair the car transmission yourself to avoid a costly mechanic's bill.


  1. Jack the vehicle up using jack stands under the front and back of the vehicle. Make sure it is stable and secure so there is no chance of it falling if someone is under it.

  2. Loosen the cables to the transmission and the cables to the radiator.

  3. Take the vacuum lines loose.

  4. Remove the U-bolts and slide the drive shaft away from the transmission.

  5. Remove the torque converter bolts and the bellhousing bolts.

  6. Slide a transmission jack under the transmission pan and begin lifting the transmission. Make sure everything is unhooked and it clears the vehicle.

  7. Lower the transmission while moving the transmission jack to the back of the vehicle.

  8. Lift the old transmission off the jack and examine the transmission for any obvious problems. If the problem is internal then a rebuild or replacement will be needed.


When replacing the transmission back into the car, make sure that the torque converter snaps into the transmission and goes all the way back. If the torque converter is not properly installed the transmission will not and can not function properly. Simply reverse the above directions to put the transmission back into the vehicle. Double check all of the lines and bolts to make sure they are tight and in place.