My 06 H3 has been setting for almost 2 years (long story). Today it was started and driven a few miles and it has slight shutter in 1st gear briefly when you start moving and then smooths out. No other noticeable shifting issues. Before it was parked there were no shifting problems at all. Any thoughts or advice would be greatly appreciated.

 

HUMMERZ would say SeaFoam TransTune to the rescue!

 

#SEAFOAMWORKS!

TRUSTED BY MECHANICS SINCE 1942

 

When was the last time the AT Trans fluid and filter were changed? If it has been a long while and many miles, Trans Tune then a fluid change.