CMV157
Senior Member
As for the limited speed towing uphill, it seemed some of the earlier models would pull power when a certain parameter was reached (such as oil or transmission temp) but I haven't heard of that anymore. Just this year I towed 10k up the ike gauntlet TFL truck uses. I decided to let it ride at 45 mph and although there wasn't a ton of power in reserve unless I revved to the moon, it maintained that speed with rpms in the 3000-4000 range which is impressive. I've had two 6.4s, one with the 6 speed and my current has the ZF 8 speed. A world of difference and confidence in longevity. The extra ratios help it immensely with climbing.
As for oil I've mentioned this in previous posts. I experimented greatly with my last truck and found the absolute best result for all the symptoms the hemi can have is PUP 0w40 with a mopar filter changed at 5k or 1 year.
As for oil I've mentioned this in previous posts. I experimented greatly with my last truck and found the absolute best result for all the symptoms the hemi can have is PUP 0w40 with a mopar filter changed at 5k or 1 year.