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Transmission mount DIY

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Old 09-27-2018, 10:43 PM
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2006 E55 AMG
Transmission mount DIY

Tools needed:
  • low-profile jack or suitable method of raising and safely supporting car approximately 1.5' to 2' off the ground
  • 16mm deep socket
  • 13mm shallow or deep socket
  • ratchet
  • small square of plywood or suitable jack pad
  • 4x jack stands (if lift not available)
  • large flat head screwdriver
  • replacement trans mount (~$18 online)
Time required: Approx 45 minutes, taking your sweet time

Step 1: Jack vehicle up using a low profile jack and utilizing two jack points: the front pad mount located at the front, center in between the two underside splash panels...and the rear differential

Step 2: Carefully lower the car onto jack stands at the factory mounting jack locations fore and aft of the wheels. Note: You can use a large flat head screwdriver to remove the four plastic mounts if they are still in place by unscrewing the center plug and simultaneously prying down on the mount to dislodge it. I prefer to leave mine off. After the plastic adapters are removed, there is a perfect slot for the jack stands to securely rest on the frame of the vehicle. See following pics:







Step 3: Position your jack with piece of plywood or suitable jack pad adapter under the trans pan and raise it just to the point where it is snug against the pan. Bring your ratchet, 16mm and 13mm sockets, and replacement mount down with you. That's all you need. To orient you, the following photo is taken looking from the rear to the front. You can see the existing mount and four bolts securing the mount (well, three of the four anyways. The two bottom ones are slightly recessed in the crossmember):



Step 4: Using the 16mm deep socket, remove the two bolts securing the mount to the trans...then using the 13mm socket, remove the two bolts securing the mount to the trans crossmember. Remove old mount and position new mount in place. Note the cracked rubber and increased distance from normal wear compared to that of a new mount (on left). Note: if you can't slide your pinky finger in between the mount at the bottom section, it's time to replace:





Step 5: With the new mount positioned in place, very slowly and carefully jack the transmission up just enough so that the new mount lines up with the bolt holes. The old one allowed the trans to sag, thus necessitating raising the trans slightly to align the new mount.

Step 6: Reinstall bolts and torque to gutentight specs, remove jack from trans, lower car.
Old 09-28-2018, 12:27 AM
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04 E55 AMG
Nice pictures great write up

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