6.7 Cummins vs 6.6 Duramax
As someone who knows next to nothing about Diesel engines, I am trying to figure out the strengths and weaknesses of these to. Any opinions would be appreciated.
Forum Discussion
ShinerBock wrote:
If I am not mistaken, the 6.4L used a Siemens K16 VDO HPFP, not a CP4.
My bad, yes the 6.4 ford used the K16 pump. Which was half the reason the disaster the 6.4 turned out to be. The other half were the injectors
The late model 16-present cp4 pumps have been much better I haven't done an inspection on a 6.7 ford with a failed pump in a awhile.
As far as trannies go. In 12 years of inspecting I've looked at 1 Alison. Then a couple dozen torque shifts (until recently) and 68 RFE's. What saves the Alison is they shut themselves down and go into limp in really easy before stuff gets torn up. VS the Torque Shift that goes and goes until it grenades. The 68's are some where in between. I have never looked at an Aisan but they aren't that terribly common so I cant comment much on them. The most recent 6 speed torque shifts seem to have a problem with the rear planetary. I have seen half a dozen school buses and as super duties that have torn up trans because of a rear planetary failure.
In my opinion I wouldn't worry about the transmission in any of the GM, Ford, or Ram 2500-3500 trucks as long as the engine is kept at its stock power levels.
