S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

500SEC Gearbox woes

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Old 06-25-2020, 04:09 PM
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500SEC Carat Duchatelet
500SEC Gearbox woes

Hi all
I have just completed a camshaft, and cam tower change on my 500SEC. It is the first time the car has fired up and moved under her own steam in maybe 2 to 3 years.
However in drive (the car has only been the length of the driveway) the car pulls itself but is very sluggish. I assume a sticking calliper may be part of the trouble. But when you go from Park to Reverse the car makes an absolute racket. I can only describe it as a thudding sound when you hold the brake on and the car shakes along with it. if you then allow the car to roll and apply the brake it then carries on. The sound is coming from the rear of the car though which makes me question if its the box?
Thanks all

Last edited by jonnyhahn; 06-25-2020 at 07:05 PM.
Old 06-25-2020, 04:41 PM
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Also to add to the issue, when I got from Park to any other gear the gearbox really heavily clunks into gear. It is not as smooth as I remember it used to be!

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