ok I got a 2001 blazer It's got the 4L60E trans. I started to have a little slipping in high gear around 60mph @2,000 rpm so I changed the filter and fluid today went for a 35 mile drive and it started to slip even more now it shifts 1st to 2nd fine but goes to shift to third and kinda heaitates to shift a little but still shifts and from third to forth is kinda hesatent and drops to 1500 rpm with no power the passing gear works fine I don't under sand it I got NO exp. with tranny's at all please help

 

You're probably best off taking it to a shop if you have no experience with it.

 

thats fine if you can afford to take it to one I can't I'm more of a DIY kinda guy anyways

 

If the transmission fluid is brown, something is falling apart and you need a rebuild.