68RFE Transmission Shifting
#16
Registered User
Ya it does. You can tell when it down shifts and unlocks the rpms go through the roof. Then when it locks up again it drops the rpms a bunch.
#17
If you take it out of TH on the highway then you will get lower RPMs and possibly better mileage as long as the terrain is not too hilly and your load isn't really heavy.
I agree on the TC locking/unlocking thing. Mine does it to. I guess this awesome trans has to have at least one fault, right?!?!?!
I agree on the TC locking/unlocking thing. Mine does it to. I guess this awesome trans has to have at least one fault, right?!?!?!
What about backroads? Frequent stops through little towns, slow curves...etc....keep it on, right?
I told you, Zilla....I'm still lurnin'
#18
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That's alright. We're all still learning...
As far as your towing, I would say that you just have to drive it the way it feels comfortable to you and your truck. You don't want to lug the engine by having it in too high a gear and you don't want to have your rpms through the roof either. You have to find that happy medium and that will be different for each person....
And it really should feel like a 7 speed trans if it is indeed locking up in 6th. I swear I only count 5 shifts and then it's done. Maybe 6th is so high that you really don't feel the TC lock up......
As far as your towing, I would say that you just have to drive it the way it feels comfortable to you and your truck. You don't want to lug the engine by having it in too high a gear and you don't want to have your rpms through the roof either. You have to find that happy medium and that will be different for each person....
And it really should feel like a 7 speed trans if it is indeed locking up in 6th. I swear I only count 5 shifts and then it's done. Maybe 6th is so high that you really don't feel the TC lock up......
#19
Registered User
No set rules though. Just experiment till you find what works for you.
#24
Registered User
The 08's have the gear selection on the shifter ****,I found by using it when towing the transmisson does not hunt for gears or downshift as much on the highway
#25
I have drove a 08 cummins but we are thinking about a 4500 Cab chassis. But right now we have a duramax with a six speed auto and it locks up in fifth then shifts to 6 and stays locked up. You really can't tell that it even shifted. Is the Dodge like that?
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