SL/R107: 1978 450SL - Vibrations after upshifting
03-16-2015, 02:28 PM
#1
Newbie
Thread Starter
1978 450SL - Vibrations after upshifting
Hello,
When I accelerate in my 1978 450SL, I hear and feel vibrations after the transmission upshifts. The shifts themselves seem smooth, but then I get the vibrations for about a second and a half. The issue is worse when accelerating harder - like getting on the freeway.
I'm thinking maybe it's the transmission mounts or motor mounts. Does that sound right? I haven't been under there yet to check them out.
When I accelerate in my 1978 450SL, I hear and feel vibrations after the transmission upshifts. The shifts themselves seem smooth, but then I get the vibrations for about a second and a half. The issue is worse when accelerating harder - like getting on the freeway.
I'm thinking maybe it's the transmission mounts or motor mounts. Does that sound right? I haven't been under there yet to check them out.
03-16-2015, 03:16 PM
#2
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450SL
Could be trans. mount. Could also be the fex discs. Stop driving and check the flex discs. If one gives out the damage it can do is more than a '78 US model is worth.
12-20-2015, 11:58 PM
#4
Newbie
Thread Starter
I was told the transmission mounts and flex discs are fine and they couldn't tell me more without checking out the transmission. I think maybe I need a second opinion. I really want it to be the mounts.
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