Trans Tune for 2005 Buick Park hard shifting [SOLVED]
I have a 2005 Buick Park Avenue with periodic hard shifting issues. Did a fluid and filter change which didn’t really help anything and no real amount of debris seen in the pan. Then learned of Trans Tune. I added a bottle of Trans Tune to the transmission. I do notice things being better than they were but not all the way better where they should be. Question: would doing another transmission fluid and filter change another time or two with using another Trans Tune treatment at each one improve things? Thanks.
Yes, it could (provided that you do not have a check engine light on with transmission code P1811-Max Adapt/Long Shift). If you do not have any codes, you can try a fluid and filter change with a can of Sea Foam Trans Tune. Otherwise if you do have a code, we recommend bringing it to a certified mechanic to have it diagnosed.
Jim D.TECH
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