Why does my transmission knock only when in tiptronic mode? 06 infiniti m35x?

RgdGdrg

New member
My transmission never knocks unless if i put it in tiptronic mode and shift auto-manually. It feels like the clutch doesnt grip in right and it shifts really hard and knocks. This only happens when in tiptronic once in a while, when I drive it hard in tiptronic. I changed the ttranny oil and such... I have 85k on it and its a vq3.5de

Could it be the awd? maybe the differential or transfer case? I havent changed the transfer case oil yet.
 
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