[wafrederick]

The 4l60e is a good transmission and I never seen a total failure.Only problems I they have are the sunshells breaking and last with regular fluid and filter changes.I know one improvement which the aftermarket is right and GM is wrong in the direct drum.There are 5 black springs in the direct drum and there is one thing to do with them: THROW THEM AWAY!Aftermarket says to throw them away and GM says to put them back in.Lots of clutch failure due to them 5 black springs,restricting the cluthes from floating which the aftermarket found out.