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Message: [QUOTE="Morgan@Midwest Diesel & Auto, post: 805397, member: 8143"] Yeah Steve said it a little harshly. But it seems that everyone that has a 4r swap gets really mad when anyone says that it's not what they would recommend. Your right I don't own a 6.4 with a 4r. I've driven a built 4r, quite a few of them, from many companies. They are fine transmissions. I have also driven built 5r's, quite a few of them, from many companies. I still wouldn't want a 4r in a 6.4. I am pointing out from experience with both that I do not think the juice is worth the squeeze for most 6.4 owners. Everyone keeps saying how bad the 5r is, please point out exact areas that a 4r is superior. Here is my shot at pros and cons of 4r swap Pros: If you use a bts, Brian will warranty it It shifts faster (not really a pro unless shooting for sub 10 sec 1/4 mile times). It has to shift less times (not really a pro unless shooting for 1/4 times). If buying a bts it's slightly cheaper (but not really cheaper than all competitors). cons: No longer a factory transmission. Must use a pcs and get special tuning for it. Must change PCM to work with swap. No cruise control yet. Not really cheaper. You loose tow haul. You lose a gear (not as good for towing). The shafts themselves are not really any stronger. The converter is not really any stronger. Not as easy to re-sell except to someone who is willing to accept the differences of a non stock transmission in the truck. If I am missing some pro's please add them in. Likewise with the cons. [/QUOTE]

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