My recent acquisition is a 2004 996 AE with 112k miles. I've been driving it for about 4 weeks and have replaced the engine mounts with Rennline Semi-solid mounts with yellow inserts (great product).
I knew the engine mounts were due as the tail pipe tips were sagging and you could hear and feel the movement in the rear. As with others, I have noticed more engine vibration with the new engine mounts and that the levels change with the ambient temperture and engine temp. The inserts soften slightly with the warmth.
I still get a dull clunk coming from (sounds like) below the rear seats... only where turning... hard right or left turn, even at low speeds produces a signal cluck about mid-turn. In a straight line, no particular sounds over bumps.
I checked the tranny mount with a floor jack and it moved only about 1/2 or 3/4" up before there seems to be more resistance on the floor jack...
Question: Is there something other than the front tranny mount that I should also consider? I need to lift the car onto jack stands and remove the belly pan to visually inspect the tranny mount. While I'm down there, would love to check/test other potential sources.
PS. When shifting... if I lift off the clucth slows, the engagement is smooth. If I lift off more spiritedly between 2-3, 3-4, 4-5, I get a thump as the clutch grabs. This is a completely different sound than above but maybe the relate?
Thx in advance for sharing your experience and knowledge.
