2007 gmc acadia has check engine light on is weak in reverse and seems to slip in third i believe with dtc code of p2714
Feb 10, 2012 at 9:59 PM
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ASEMASTER6371
CERTIFIED EXPERT
52,796 POSTS
you have internal trans issues. you need a trans shop to track it down and give you a bid. it most likely will have to come out and be overhauled.
Roy
Feb 11, 2012 at 3:44 AM
DENNYP
CERTIFIED EXPERT
1,824 POSTS
You most likley have a shattered 3-5 reverse clutch waved plate. It is the weak point on this transmission.The trans will need to be removed and torn down for an inspection.