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3-4 slpi only when cold

Digger56

New Member
Messages
2
Reaction score
1
Location
Allentown, PA
I have a bone stock 2010 GMC with 115K miles on it have changed the fluid and filters( using factory fluid and filters) a few times since new. It has a momentary slip when shifting from 3rd to forth but only before driving about 10 miles. It just started about a month ago, I tow a 14k camper on longer trips. Any ideas?
 
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