My trany in my 94 z28 has 104k miles on it. It still shifts realy good but someone i no told me gm trany shift there greats befor they blow... where can i find a replacement trany its a 4L60E how much hp can a new one handle and how hard and how much whould it be to do the T56 conversion

 

I have never heard that before, If it isn't broken don't fix it.