Forum Discussion
- When descending Ashland pass coming into Oregon on I-5 for example with full EB and TH on I set cruise to 55 and lock out 3rd gear with 33K combined weight and it holds down the pass no problem. I am running in the high 2K rpm range. If I choose 4th it will hold most of the way but will creep up and need to touch the brakes lightly and hit resume on cruise.
EXPERIMENT is all I can say. We humans can SEE what's in front of us. transamz9 wrote:
The EB in full mode will work just as hard as auto mode you just have to touch the brake pedal to tell the truck to downshift. You don't have to manually shift it.
True, but in a test where you are scored on brake taps and you want the truck to do it all, full mode is not the mode you want to be in.FishOnOne wrote:
jus2shy wrote:
ShinerBock wrote:
No, as I stated before in another thread(which you were apart of) Mr. Truck did not use the correct mode the last time they did an Ike test with the Ram 3500. Nor did the guys in the GM test. He should have used the exhaust brake in "Auto" mode if he wanted the truck to do all the work of downshifting to keep a certain speed. It clearly states in the owners manual that "Auto" mode is used for keeping a certain speed.
The GM trucks are put in their "Auto" mode by selecting cruise control which Mr. Truck used the cruise control in the last GM test going down the hill. So he used the GM in "auto" mode, but not the Ram in "Auto" mode which is why he had hit the brakes more. "Auto" mode in the Ram is if you want the truck to do all the work(which is what the Ike was all about), and "Full" mode is used if you want to manually control the downshifting to keep a certain speed.
Can easily verify this. If you leave the exhaust in the default (orange icon) mode, it just means that the exhaust brake engages as soon as you let off the accelerator pedal. The system will not work as hard to downshift and maintain a speed. Auto mode will allow coasting until you're up to 5mph over your set cruise control speed. Also, this allows the ECU to try pure engine braking first, if that's ineffective, then it uses the exhaust brake. It also works to keep downshifting until it starts holding or bringing speed under control.
Thanks for clarifying J2S.
The EB in full mode will work just as hard as auto mode you just have to touch the brake pedal to tell the truck to downshift. You don't have to manually shift it.jus2shy wrote:
ShinerBock wrote:
No, as I stated before in another thread(which you were apart of) Mr. Truck did not use the correct mode the last time they did an Ike test with the Ram 3500. Nor did the guys in the GM test. He should have used the exhaust brake in "Auto" mode if he wanted the truck to do all the work of downshifting to keep a certain speed. It clearly states in the owners manual that "Auto" mode is used for keeping a certain speed.
The GM trucks are put in their "Auto" mode by selecting cruise control which Mr. Truck used the cruise control in the last GM test going down the hill. So he used the GM in "auto" mode, but not the Ram in "Auto" mode which is why he had hit the brakes more. "Auto" mode in the Ram is if you want the truck to do all the work(which is what the Ike was all about), and "Full" mode is used if you want to manually control the downshifting to keep a certain speed.
Can easily verify this. If you leave the exhaust in the default (orange icon) mode, it just means that the exhaust brake engages as soon as you let off the accelerator pedal. The system will not work as hard to downshift and maintain a speed. Auto mode will allow coasting until you're up to 5mph over your set cruise control speed. Also, this allows the ECU to try pure engine braking first, if that's ineffective, then it uses the exhaust brake. It also works to keep downshifting until it starts holding or bringing speed under control.
Thanks for clarifying J2S.rhagfo wrote:
It would be nice if they could be a little more consistent, maybe run the Gauntlet several times using different pulling and braking styles.
Might also help if they read the owners manual on cruse and EB operation.
I liked the part during the F450 test when they had maintenance at the top of the hill and couldn't run the whole test. You would think they would check the route first!
The test with the 2017 F450 was done at a minutes notice so they jumped on the opportunity when Mike L. handed them the keys and told them to have fun. They ran the Ike ~ midnightShinerBock wrote:
FishOnOne wrote:
I believe the difference in the exhaust brake performance is Mr. Truck manually down shifted the truck whereas in the past test they let the truck decide when to shift.
I agree with Patriotgrunt that they should be consistent with the test methodology.
No, as I stated before in another thread(which you were apart of) Mr. Truck did not use the correct mode the last time they did an Ike test with the Ram 3500. Nor did the guys in the GM test. He should have used the exhaust brake in "Auto" mode if he wanted the truck to do all the work of downshifting to keep a certain speed. It clearly states in the owners manual that "Auto" mode is used for keeping a certain speed.
The GM trucks are put in their "Auto" mode by selecting cruise control which Mr. Truck used the cruise control in the last GM test going down the hill. So he used the GM in "Auto" mode, but not the Ram in "Auto" mode which is why he had hit the brakes more with the Ram.
"Auto" mode in the Ram is if you want the truck to do all the work(which is what the Ike was all about), and "Full" mode is used if you want to manually control the downshifting to keep a certain speed.
The main different between Ram's "Auto" mode and GM's "Auto" mode is that you don't have to be in cruise control to have it activated. It will keep the speed you were at when let your foot off the accelerator. So if you don't have it cruise control and let off the accelerator at 60 mph at the top of a hill, the truck will automatically put on the exhaust brake and even downshift to keep you at 60 mph since that was the last speed you were at before you let off the accelerator. You have to be in cruise control in order for the GM to do this.
So if you wanted to be fair and consistent between trucks like you are saying, then they need to put the Ram in "Auto" mode since the GM was in its "Auto" mode when they activated cruise control.
I agree with what you said... I'm sure Mr. Truck is not aware of how the different exhaust brake modes work, but he should so the tests are done with the correct settings.- It would be nice if they could be a little more consistent, maybe run the Gauntlet several times using different pulling and braking styles.
Might also help if they read the owners manual on cruse and EB operation.
I liked the part during the F450 test when they had maintenance at the top of the hill and couldn't run the whole test. You would think they would check the route first! ShinerBock wrote:
No, as I stated before in another thread(which you were apart of) Mr. Truck did not use the correct mode the last time they did an Ike test with the Ram 3500. Nor did the guys in the GM test. He should have used the exhaust brake in "Auto" mode if he wanted the truck to do all the work of downshifting to keep a certain speed. It clearly states in the owners manual that "Auto" mode is used for keeping a certain speed.
The GM trucks are put in their "Auto" mode by selecting cruise control which Mr. Truck used the cruise control in the last GM test going down the hill. So he used the GM in "auto" mode, but not the Ram in "Auto" mode which is why he had hit the brakes more. "Auto" mode in the Ram is if you want the truck to do all the work(which is what the Ike was all about), and "Full" mode is used if you want to manually control the downshifting to keep a certain speed.
Can easily verify this. If you leave the exhaust in the default (orange icon) mode, it just means that the exhaust brake engages as soon as you let off the accelerator pedal. The system will not work as hard to downshift and maintain a speed. Auto mode will allow coasting until you're up to 5mph over your set cruise control speed. Also, this allows the ECU to try pure engine braking first, if that's ineffective, then it uses the exhaust brake. It also works to keep downshifting until it starts holding or bringing speed under control.
Personally, I'm unsure how the Ford system behaves exhaust brake wise if it's 2-mode like RAM or just single mode?FishOnOne wrote:
I believe the difference in the exhaust brake performance is Mr. Truck manually down shifted the truck whereas in the past test they let the truck decide when to shift.
I agree with Patriotgrunt that they should be consistent with the test methodology.
No, as I stated before in another thread(which you were apart of) Mr. Truck did not use the correct mode the last time they did an Ike test with the Ram 3500. Nor did the guys in the GM test. He should have used the exhaust brake in "Auto" mode if he wanted the truck to do all the work of downshifting to keep a certain speed. It clearly states in the owners manual that "Auto" mode is used for keeping a certain speed.
The GM trucks are put in their "Auto" mode by selecting cruise control which Mr. Truck used the cruise control in the last GM test going down the hill. So he used the GM in "Auto" mode, but not the Ram in "Auto" mode which is why he had hit the brakes more with the Ram.
"Auto" mode in the Ram is if you want the truck to do all the work(which is what the Ike was all about), and "Full" mode is used if you want to manually control the downshifting to keep a certain speed.
The main different between Ram's "Auto" mode and GM's "Auto" mode is that you don't have to be in cruise control to have it activated. It will keep the speed you were at when let your foot off the accelerator. So if you don't have it cruise control and let off the accelerator at 60 mph at the top of a hill, the truck will automatically put on the exhaust brake and even downshift to keep you at 60 mph since that was the last speed you were at before you let off the accelerator. You have to be in cruise control in order for the GM to do this.
So if you wanted to be fair and consistent between trucks like you are saying, then they need to put the Ram in "Auto" mode since the GM was in its "Auto" mode when they activated cruise control.- Never mind... :)
