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Transmission issues 07 denali
I picked up 07 Yukon Denali with 165k on it last week. I’ve notice when trans temp gets around 140-150 it’s starts shifting or not shifting till high rpms then shifts hard. If I put it in manual mode it shifts fine no slipping shift with no problems. When I bought it last week it did have a...- Jakkel667
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- Forum: Performance
