chevota84
New member
- Joined
- Jul 6, 2009
- Messages
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After 20 years of using the Cummins and watching it eat autos, they designed the 68 from scratch and gained virtually nothing. The Allison works very well for a duramax and the 6r works great for Ford, while the 68 doesn't work well anywhere. They feel confused and mushy and won't survive anything over stock power levels.Meaning not stock.
I was just referring to the mechanical differences of V8 vs L6. The 5.9L and 6.7L Cummins are a lot harder on drive train components. One less power pulse per rotation, larger pistons, more torque lower in the rpm range, etc. I 've seen a couple 12v's (I know, not CR's. ..) bust up the Alison pretty nicely. Expensive unit to rebuild. I never much got into the Aisin or 68RFE yet but I just meant to say there's more to it than Dodge just can't make or get a decent trans.
We've got a local shop that can tune the 68RFE pretty decently. They tuned one up for a buddy of mine and he says he has no complaints. Regular tow machine on a 34' gooseneck. 150hp tune but only has around 100,000 kms on the new trans tuning though so reliability remains to be seen.
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