went my transmission shifts from 1st to second it is a hard shift sometimes. It depends on how much gas i give. It does this when throttle is around the 1/4 to 1/2 way point. Can this be fixed with a trans fluid change and flush or is my trans or rear end starting to go? Any help is always appreciated.

 

You may try flushing it...does it have any pcm work done to it?

 

no pcm work done to it just the mods on my profile....