โJul-09-2023 07:48 PM
โAug-03-2023 10:39 AM
Me Again wrote:4x4ord wrote:
I think the secrete to better grade braking is electric axles on the trailers. Charge the batteries on the way down and help pull
on the way up.
I do not think many owners realize that Fords going down a hill on cruise control or ACC that the truck applies the service brakes including the trailer brakes. This could lead to overheating the trailer brakes without the driver realizing it. I am not sure if the others GM and RAM are the same now. I sure miss my 2015 RAM's exhaust brake going down passes and hills(always had nice cool service brakes) on my yearly commute to AZ and back to Wa.
โAug-03-2023 10:25 AM
โAug-03-2023 07:45 AM
Huntindog wrote:Cummins12V98 wrote:Decending from Jacob Lake towards Page and Flagstaff has some 30 MPH switchbacks. One really scary one with no guardrail. A mistake there and you will scream a long time before you die. I do this at least twice a year using only the exhaust brake. I select the gear I want manually. Because I have eyes and can see the curves approaching.
North bound I-5 coming into OR I drop into 3rd and it holds easily 50-55mph using cruise set a few mph lower than desired speed. I do apply the brakes on the 50mph curves. Brakes are cold and drops speed fast.
I am pretty heavy as well. Easily over 30K
โAug-02-2023 06:54 PM
Cummins12V98 wrote:Decending from Jacob Lake towards Page and Flagstaff has some 30 MPH switchbacks. One really scary one with no guardrail. A mistake there and you will scream a long time before you die. I do this at least twice a year using only the exhaust brake. I select the gear I want manually. Because I have eyes and can see the curves approaching.
North bound I-5 coming into OR I drop into 3rd and it holds easily 50-55mph using cruise set a few mph lower than desired speed. I do apply the brakes on the 50mph curves. Brakes are cold and drops speed fast.
โAug-02-2023 02:23 PM
โAug-02-2023 10:16 AM
โAug-02-2023 08:13 AM
4x4ord wrote:
I think the secrete to better grade braking is electric axles on the trailers. Charge the batteries on the way down and help pull
on the way up.
โAug-01-2023 05:47 PM
โAug-01-2023 03:41 PM
โAug-01-2023 10:19 AM
Cummins12V98 wrote:FishOnOne wrote:4x4ord wrote:
^^^If itโs just about marketing I think 8 gears and a few more ponies would probably be enough for Ram customers to be happy. If itโs about actually keeping up to Ford up the hill the Cummins being a little higher revving makes enough torque at 1075 lbft but needs 500 hp at 2800 rpm to run neck and neck with the HO Powerstroke. I think adding 80 hp might not necessarily be that easy to do. It might be easy enough to just add fuel but meeting emissions and keeping the heat away may require some significant changes.
As of recent years Ram/Cummins don't like to suck hind teet, so I suspect there will be significant changes with the next gen HD trucks powertrain. The big question is when?
I guess we could turn the tables and discuss when GM and Ford will get a better exhaust brake to keep up with RAM.
I think too much time is spent one upping with the more is better. Some like 4x4 get the inline 6 does just fine with 6.
โAug-01-2023 10:17 AM
โAug-01-2023 09:08 AM
โAug-01-2023 09:00 AM
FishOnOne wrote:4x4ord wrote:
^^^If itโs just about marketing I think 8 gears and a few more ponies would probably be enough for Ram customers to be happy. If itโs about actually keeping up to Ford up the hill the Cummins being a little higher revving makes enough torque at 1075 lbft but needs 500 hp at 2800 rpm to run neck and neck with the HO Powerstroke. I think adding 80 hp might not necessarily be that easy to do. It might be easy enough to just add fuel but meeting emissions and keeping the heat away may require some significant changes.
As of recent years Ram/Cummins don't like to suck hind teet, so I suspect there will be significant changes with the next gen HD trucks powertrain. The big question is when?
โAug-01-2023 08:56 AM
blt2ski wrote:Cummins12V98 wrote:Bionic Man wrote:
The video that the troller posted originally has nothing to do with the HO engine and the Aisin transmission. Itโs the old 68RFE that canโt handle the high output.
So, without question, a 2500 would perform better with a different transmission (preferably with 8 or 10 gears) that can handle more HP and TQ.
And if weโre making requests, letโs do a ZF since they are one of the best. And no, I donโt care even a little if the transmission is outsourced.
My 11 HO DRW 3.42's with 68rfe did a fine job with none of the complaints from others towing 30k combined. Probably because I ran the HE!! out of it for the first hundred miles, trained it well. Nice firm shifts! The only issue was getting the load rolling on grade. If it had 4.10's I would probably still own it pulling 35k+.
Ron,
You have just described the positive for the 8 and 10 sp transmissions. You won't need 4.10s with a 6 so to move 35k lbs. Because the 10 sp that Ford and GM use has a 4.56 iirc 1st gear vs you 3.5x. reality is, a 10 sp will have an overall low, lower than a 4.10 geared rig, yet give you the low rpm freeways gears.
My 6sp 4.3v6 has more torque hitting the ground than ANY of my 4.10 gear 4 so autos. I have a 4.10 in first, instead of a 2.48 in 1st, I can multiply more with my ra at 3.42.
This is what your missing with a 6 so vs a 10 sp.
My 6sp is better than my 4 so autos, not as good as the 8 so at 4.3 in 1st, 10 sp is about 4.5x. that lower gear you want for startup is in the transmission!
Ye Ford4x is correct, you may not tow much faster up hills on a freeway grade, UNLESS you can get more HP and or torque to the rear wheels.
Marty