MotoFish
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Yes sir, I too LOVE and use that Adaptive Cruise when towing. Heck, I use it all the time! So niceCruise? Hell, I use adaptive cruise. (I do have active braking set to warning only).
Yes sir, I too LOVE and use that Adaptive Cruise when towing. Heck, I use it all the time! So niceCruise? Hell, I use adaptive cruise. (I do have active braking set to warning only).
When im towing heavy i rarely get over 65 unless passing, most of our speed limits are 50-55 so we can get away with 60-65 without getting a ticket lolIf you look at my sig, for what I tow I'm probably the slowpoke. No need to run over 70-75MPH in wide open spaces. MPG is better around 72.
Not sure why this seems to be getting lost in this discussion. None of these trucks would pull grades well if the tranny stayed in the top gear. There is something wrong with the subject truck that is preventing it from downshifting. Take to your dealer.I have to agree with others about this guys shifting issue. Not worried about the power. I would be more concerned about the shifting. 68RFE, does not have the best reputation. They’ve improved it, but won’t perform like the Aisin. Obviously a new truck. A dealer check would be the smartest thing. window. Not a kid anymore, so I don’t drive like a loon anyway (or anymore), I save that for Moto, but I do work my truck(s) always have, that’s why I drive a Cummins.
Thats the problem with the V8 diesels, higher RPM to get the advertised HP.The truck won't downshift if the next lower gear would put the RPM above redline. He says the boost is 26psi and I have no idea what the max boost on an SO motor is. I have an HO and see 36 when I'm climbing a pass with my trailer. Guess it would help if we knew what RPM he was at. I can see how someone coming from a Powerstroke or Duramax could think their Cummins needed to downshift more on a grade. The redline on those others is way above the Cummins. I have owned several Cummins trucks over the years and tried out a 2018 Powerstroke for a couple of years. Surprised me how much higher the engine speed was before it shifted.
Our interstates are 80…. Climbing one of the grades, I decided to take the cruise off and rolled into the throttle a little. When close to cresting the top, I finally looked down, 87! Yikes….. with 17k 5er, that was a little too much, and I really thought I was just cruising. Didn’t even notice I was actually picking up speed. It amazes me how smooth, quiet and powerful these trucks really are.When im towing heavy i rarely get over 65 unless passing, most of our speed limits are 50-55 so we can get away with 60-65 without getting a ticket lol
If you look at my sig, for what I tow I'm probably the slowpoke. No need to run over 70-75MPH in wide open spaces. MPG is better around 72.
What % grade was that and how long?Our interstates are 80…. Climbing one of the grades, I decided to take the cruise off and rolled into the throttle a little. When close to cresting the top, I finally looked down, 87! Yikes….. with 17k 5er, that was a little too much, and I really thought I was just cruising. Didn’t even notice I was actually picking up speed. It amazes me how smooth, quiet and powerful these trucks really are.
Sorry Brutal, I don’t remember. Somewhere on I-80 between Reno NV and Winnemucca NV. It was a few miles, but as on the interstate, it’s not too steep. I honestly wasn’t trying to go that fast, it just happened.What % grade was that and how long?
True, but I doubt the OP is over the RPM limit in 6th gear in mountainous terrain pulling a large 5th wheel. The speed limit on the interstate I haul a lot on here in the Ozark Mts is 75mph, and my 2500 SO will downshift to 5th on the biggest hills at those speeds. No manually shifting, it just does it's thing. Just got back from CO too. Truck downshifted as needed to keep the speed up most of the major climbs and passes. If it had been stuck in 6th, that trip would have sucked.The truck won't downshift if the next lower gear would put the RPM above redline. He says the boost is 26psi and I have no idea what the max boost on an SO motor is. I have an HO and see 36 when I'm climbing a pass with my trailer. Guess it would help if we knew what RPM he was at.
Where does he say he's in 6th? All it says is the truck won't downshift. Nowhere does it say what gear it was in at the bottom of the hill and how fast the truck was going so who knows?True, but I doubt the OP is over the RPM limit in 6th gear in mountainous terrain pulling a large 5th wheel. The speed limit on the interstate I haul a lot on here in the Ozark Mts is 75mph, and my 2500 SO will downshift to 5th on the biggest hills at those speeds. No manually shifting, it just does it's thing. Just got back from CO too. Truck downshifted as needed to keep the speed up most of the major climbs and passes. If it had been stuck in 6th, that trip would have sucked.
Good point. Re-reading it, it is hard to say if he means it won't downshift from top gear or if he means it won't downshift as much as he'd like. Last the OP posted was 8/3, so we never find out.Where does he say he's in 6th? All it says is the truck won't downshift. Nowhere does it say what gear it was in at the bottom of the hill and how fast the truck was going so who knows?
Good point. Re-reading it, it is hard to say if he means it won't downshift from top gear or if he means it won't downshift as much as he'd like. Last the OP posted was 8/3, so we never find out.
I had a 14 SO and to me the problem was the 68rfe downshifting soon enough when into a grade . I found dropping it manually really helped keeping the power curve up . Once the parts get polished in pulling and power improve .
I had a 14 SO and to me the problem was the 68rfe downshifting soon enough when into a grade . I found dropping it manually really helped keeping the power curve up . Once the parts get polished in pulling and power improve .
Thats why I wanted the HO, it was only for the Aisin auto. It could have been opposite with the 68rfe having the HO and Aisin being the SO, I would buy the SO AIsin.
Same thing, I went for Aisin didn't care much for HO.Thats why I wanted the HO, it was only for the Aisin auto. It could have been opposite with the 68rfe having the HO and Aisin being the SO, I would buy the SO AIsin.
I don't think they shouldn't offer a 68rfe but would be nice if they could mix and match. I wanted Aisin but there are plenty of folks who don't tow heavy and like the ability to tune the 68rfe, it's probably a good tranny for DD.Ram should view these threads. They should not even offer the 68RFE.
Should be SO with Aisin or HO with Aisin. Maybe have the 68RFE for a gasser, but even now they have an 8 speed tranny for that, so the 68 should be phased out.
I guess it’s a cost thing?