yes the 4r not for eveyone the 4r is a awesome trans and after driving mine i dont think i would want to go back to a 5r but thats just me. the 4r did help keep the smoke down and stay on top my turbo
glad to hear your happy with the 4r i thought the same thing the first time i drove mine. i like the way it seem to keep the truck on top the turbo. and like you said it keep the smoke down i can drive my 300hybrids in town with almost no smoke.