The one ZF was testing was rated north of 1000 ft lbs as stated by ZF. I'm wondering if they have a contract with Aisin for "X" amount of years. They are probably also trying to pull in as much money as they can from the 68rfe as it is an in house design that they've had they're factory tooled for since '07.5. There have been updates to it over the years but nothing huge as far as redoing everything in the factory. The SO vs HO thing is a joke but it's a way for FCA to make more money as they make more off of the 68rfe.I'm wondering what the reasoning was for not putting the ZF8 in the CTD? Maybe it won't hold up to the torque in its current configuration?@mxsledder I agree 100%, if Allison didn't think it was a good transmission, they wouldn't have put their name on it. They definitely tested/approved it. I really wish GM would show what gear it is in without having to put it in manual mode.
Ram was the first one out with an 8 speed/greater than a 6 speed in the half tons. They are way behind the times with the diesel. I honestly thought there would be a ZF8 behind the cummins in the 2019 model year. ZF had been testing one for years in the 4th gen trucks. IIRC they shaved around 2 seconds off the 0-60 time compared to the Aisin. The 8 speed has done wonders for the 6.4 hemi.
Once/if the ZF8 is released, there will be absolutely no point to having a SO and HO option and they should really only offer the ZF8, even in the chassis cabs provided there is a PTO option on the transmission (which I'm pretty sure there will be).
ZF knows how to build a great transmission. The ZF8 in the half tons is by far the best transmission in any pickup truck in the class when it comes to reliability, longevity, shifting algorithm and shift quality. I have no doubt in my mind that whatever ZF8 is built for the Cummins, will be best in class as well.