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07-15-2014, 07:18 PM
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#1
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Senior Member
Join Date: Dec 2012
Location: West Palm Beach, Fl
Posts: 1,482
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Cruise control and Jake Brake
Coming through Montana today, I experimented with the cruise control and Jake. Cruise control set at 63. Jake on low setting. Came down the mountains and when I hit 73 the aux brake signal came on. There was no decrease in speed nor increase in rpm at this speed. Two mph more and the retarding started...but I was already at 75, 12 mph more than I wanted. Is this others experience with the two? Can it be reprogrammed to activate at 5 mph over cruise?
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Corey and Tammi
2018 Allegro Bus 40SP
2009 Lexus GX470
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07-15-2014, 07:31 PM
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#2
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Senior Member
Entegra Owners Club
Join Date: Sep 2012
Posts: 6,686
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Yes, hat is my experience. Even in stage 2, the initial engage when in cruise control may happen immediately, but doesn't do much until you're 10-15 mph over your setting. If the hills are step and there are curves, like you're going to find soon, I take the cruise off and use stage 2. It'll drop you into 24 on the tranny and start your slow. If you want, then when you touch the accelerator, it will disengage. I just find it easier that way.
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Dave and Beth
2015 Cornerstone 45J
2020 Ford F-150 Lariat
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07-15-2014, 08:31 PM
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#3
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Registered User
Join Date: Jun 2014
Posts: 132
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Dave and Beth, yeah, turning the cruise off is good for major hill areas, but I see how having the ability to regulate this would be a bonus. using the gas to engage and disengage jerks the coach. I already have a hard time reaching the peddles and rely on the cruise all the time. Today I was on i25 going to Albuquerque, it has long up and down grades but there are washes that come out of nowhere and your flying. I wish I could set how many MPH before the cruise engages the jake beak as well. I wonder if Cummings can hook up the computer and set this?
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07-15-2014, 08:49 PM
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#4
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Registered User
Join Date: Apr 2013
Location: NV
Posts: 2,227
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It could be in your speed warning settings I have not looked, not near coach til next week.
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07-16-2014, 05:54 AM
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#5
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Senior Member
Entegra Owners Club
Join Date: Apr 2007
Location: SW FL
Posts: 31,569
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One thing about using the Jake brake with cruse control is you loose the most economical speed there is.....coast.
__________________
Chuck in SW FL
Digital 2021 Cornerstone "B"
A "Digital" 2019 Cornerstone "B" Traded
A "Classic" 2014 Anthem 42 RBQ---Sold
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07-16-2014, 07:06 AM
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#6
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Registered User
Join Date: Jun 2014
Posts: 132
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Yes coasting is saving gas, but if your already cruising at 70 MPH and your headed down a hill, cruise does not engage the Jake break till your 15 MPH over the set speed your flying at 85 MPH (in excess of the 75 MPH speed rating of your michelin tires)
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07-16-2014, 09:57 AM
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#7
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Senior Member
Entegra Owners Club
Join Date: Apr 2012
Location: Green Valley, AZ
Posts: 1,735
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In hilly terrain, I use cruise and aux brake. I set cruise at 60 but I'll let it run to 70+ on down hills. If it lets me go faster than I want I just hit cancel on the cruise and the aux brake works normally then I resume cruise when the down slope starts to flatten out. That way I get the "coast mileage" until human intervention is required with no herky jerky.
__________________
Stew and Diane (and Marco)
2018 Entegra Cornerstone 45X
Formerly: 2015 Entegra Cornerstone 45B, 2013 Entegra Aspire DEQ IFS, 2004 DSDP; all sold
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07-16-2014, 06:06 PM
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#8
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Senior Member
Entegra Owners Club
Join Date: Sep 2012
Posts: 6,686
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Pls note, I said in hilly terrain with curves where you have to maintain some semblance of control...like you are going to find in N CA, OR, Wash, and ID. I am pretty familiar with 80 downhill and down to 50 going up the next in NM. Fun, but also straight! You hit a curve with the Anthem going 70 (on a 50 curve) and I assure you, you are going to feel just a little top heavy...particularly on these "high banked" NOT roads. JMHO, of course
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Dave and Beth
2015 Cornerstone 45J
2020 Ford F-150 Lariat
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07-16-2014, 06:13 PM
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#9
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,308
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Quote:
Originally Posted by CoreyinWP
Coming through Montana today, I experimented with the cruise control and Jake. Cruise control set at 63. Jake on low setting. Came down the mountains and when I hit 73 the aux brake signal came on. There was no decrease in speed nor increase in rpm at this speed. Two mph more and the retarding started...but I was already at 75, 12 mph more than I wanted. Is this others experience with the two? Can it be reprogrammed to activate at 5 mph over cruise?
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Corey, I believe you can have that changed in the Allison TCM at a Allison shop to activate sooner. At 3 mph over/under, 5 mph over/under etc. Stop by a Allison dealer in your travels, it only takes a short period of time to hook the laptop up to your Coach and change the settings.
Add on: Mine is a exhaust brake, ok, same printable, My TCM is set to activate the exhaust brake at 3 mph over and shut off at 3 mph under set point. Every time you meet the set point, your transmission is going to downshift to the preselected gear to slow you, then at the "under" set point, kick off your compression brake and shift back to 6th gear. On a long hill or steep grade, this will go on and on the whole way down the hill on cruise, downshift to preselected gear, slow, off, back to 6th, and when speed picks up a bit, starts the downshift all over again. I did not like the way mine drove when the cruise control was on as it is on a lot in my travels........I had them set my transmission to stay in 6th gear, no downshift when the cruise turns my exhaust brake on, been this way for 4 year now, love it.
Another add on: Just thinking, I wonder if it was set up that way, 15 mph over, so the transmission didn't downshift, slow, up shift back to 6th, pick up a little speed, down shift.....and keep doing this shift process the whole way down a long grade? with the cruise on.
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2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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07-16-2014, 07:43 PM
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#10
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Senior Member
Entegra Owners Club
Join Date: Nov 2012
Posts: 8,094
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Don't try to use the cruise control for braking, you have to do it yourself. If you tap the brake to release the cruise control, the Jake brake will engage immediately. Same thing Cobbersdad is doing when he hits the cancel button. You should be anticipating the need for this. Better to initiate the braking early than late.
__________________
Marc and Jill, Wellington FL
2013 Entegra Anthem 44SL
2018 Lincoln MKX
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07-17-2014, 08:51 AM
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#11
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Senior Member
Join Date: Jul 2012
Posts: 439
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Quote:
Originally Posted by CoreyinWP
Coming through Montana today, I experimented with the cruise control and Jake. Cruise control set at 63. Jake on low setting. Came down the mountains and when I hit 73 the aux brake signal came on. There was no decrease in speed nor increase in rpm at this speed. Two mph more and the retarding started...but I was already at 75, 12 mph more than I wanted. Is this others experience with the two? Can it be reprogrammed to activate at 5 mph over cruise?
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I experienced the same thing when I played with it going from Miles City to Bozeman day before yesterday. it actually gave off a wierd horn sound and the dash said aux brake function. when I turned it off the sound faded away.
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07-17-2014, 09:24 AM
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#12
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Senior Member
Join Date: Dec 2012
Location: West Palm Beach, Fl
Posts: 1,482
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We just came through there as well. I wonder, as suggested, the transmission can be reprogrammed to activate the jake a bit sooner and keep the speed down. I will ask around at the FMCA rally.
__________________
Corey and Tammi
2018 Allegro Bus 40SP
2009 Lexus GX470
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07-17-2014, 10:26 AM
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#13
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Senior Member
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,587
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Quote:
Originally Posted by MRUSA14
Don't try to use the cruise control for braking, you have to do it yourself. If you tap the brake to release the cruise control, the Jake brake will engage immediately. Same thing Cobbersdad is doing when he hits the cancel button. You should be anticipating the need for this. Better to initiate the braking early than late.
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Good advise.
Steve Ownby
Full time since '07
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Steve Ownby
Full time since 2007
2003 Monaco Signature
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07-31-2014, 12:13 AM
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#14
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Senior Member
Join Date: Jun 2010
Location: Sun City Center, FL
Posts: 1,847
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Quote:
Originally Posted by CoreyinWP
We just came through there as well. I wonder, as suggested, the transmission can be reprogrammed to activate the jake a bit sooner and keep the speed down. I will ask around at the FMCA rally.
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Check in at the Allison Transmission booth...they usually have one. You can get the program guide as it's already posted on the FMCA.com website.
__________________
Pat & Medarda Bauer; Tess and Tighe (our fur kids)
2017 Entegra Anthem/FL/Allison/Grand Cherokee
Entegra Coach Owners Association, President
Sun City Center, FL
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