Ensemble tambour de friction "B" de prise directe de la transmission automatique CVT 6R80
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Défauts Typiques :
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Dénudage des cannelures
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Symptôme : Glissement en prise directe (codes P0733/P0776)
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Cause : Cannelures en acier trempé s'usant contre le tambour en aluminium
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Rayures sur l'alésage du piston
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Symptôme : Changement de vitesse 3-4 retardé
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Déclencheur : Liquide de transmission contaminé agissant comme abrasif
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Fissuration du tambour
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Symptôme : Perte soudaine de motricité (débris métalliques dans le carter)
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Cause première : Fatigue thermique près des orifices de lubrification
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Contrôles Critiques :
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Engagement des cannelures : Doit avoir <0,1 mm de jeu rotationnel
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Diamètre de l'alésage : Mesurer en 3 points (conicité >0,03 mm échoue)
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Faux-rond du tambour : >0,05 mm nécessite un remplacement
Conseil de pro :Utiliser du lubrifiant d'assemblage sur les cannelures lors de la reconstruction – les démarrages à sec accélèrent l'usure

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Transmission automatique CVT 6R80
,Ensemble de transmission automatique CVT
,Ensemble de transmission automatique
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