AllanB
New member
Just something that has made me curious for quite sometime. Why does the 6.4 shift out at about 1000rpms less than the 6.0 ? Don't get into a bunch of talk about camshafts. That isn't the answer I am looking for. What I am wondering is, what is the deal that International would build it to shift around 3100rpms and not higher? No problems with it, just curious. Might be a dumb question, so don't drag out the bash hammer on me.