transmission shifting hard

[quote:f7f949ea3c="cntryangel"]I have a 2004 chevy impala and when i drive it the sometimes the tranny wants to shift hard i have taken it to alot of shop and they tell me they cannot find nothing wrong with it so please could you tell me what is causing it to want to shift hard at times[/quote:f7f949ea3c]
I am having the same problem on my '04 Impala. It will shift like this for a day or so and then be fine for a few weeks.

I would like to know why it does this too.

I am having the same problem on my '04 Impala. It will shift like this for a day or so and then be fine for a few weeks.

i finally found out the problem with my trans on my 04 impala take it to the shop and have them to put in a new EPC in the trans and if you do not know what EPC stands for it stands for Electronic Pressure Control it has to do with the trans shifting once you get that put in your trans will shift like it is suppose to hope this will help you it did me and now my trans is working great

I have an 04 impala with a hard shift. Can you tell me the cost of an EPC replacement. It sounds like what that is. I saw a few people have it replaced

Hello,

This is an older post so we are not sure what it will cost, can you please let us know when you have it done?

Best, Ken