W205 C63s rpm spike when cruising after repairing gearbox
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Joined: Jun 2022
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c63s
W205 C63s rpm spike when cruising after repairing gearbox
Hi All, need help with my car. I have change tcu, wet clutch and valve body, adaptation all done but feels like transmission still slipping. Please advise
Senior Member
Joined: Dec 2021
Posts: 268
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From: Maryland
2018 C63s
What other mods are on the car? Is this a 722.9 7 speed or the newer 9 speed transmission? Transmissions are somewhat complicated but there are cursory checks that are done to verify that the pumps (mechanical and electronic) are functioning properly and delivering enough fluid to hold and allow the bands and clutch packs to transfer power properly. The wet clutch system is a really nice system but again requires adequate pump pressure and line pressure to operate properly and to its full potential.
Thread Starter
Newbie
Joined: Jun 2022
Posts: 5
Likes: 0
c63s
*****The transmission needs to be checked for adequate line pressures and possible glazing or worn clutches and bands. How many miles on the trans and what did the fluid look like and did it smell burnt when it came out? Was there a lot of clutch and band material in the bottom of the pan and were the magnets full of metal shavings?
What other mods are on the car? Is this a 722.9 7 speed or the newer 9 speed transmission? Transmissions are somewhat complicated but there are cursory checks that are done to verify that the pumps (mechanical and electronic) are functioning properly and delivering enough fluid to hold and allow the bands and clutch packs to transfer power properly. The wet clutch system is a really nice system but again requires adequate pump pressure and line pressure to operate properly and to its full potential.
What other mods are on the car? Is this a 722.9 7 speed or the newer 9 speed transmission? Transmissions are somewhat complicated but there are cursory checks that are done to verify that the pumps (mechanical and electronic) are functioning properly and delivering enough fluid to hold and allow the bands and clutch packs to transfer power properly. The wet clutch system is a really nice system but again requires adequate pump pressure and line pressure to operate properly and to its full potential.
