RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Entegra Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 06-08-2016, 06:30 AM   #1
Senior Member


 
Join Date: Jan 2016
Location: Raleigh, NC
Posts: 276
Pulling a Long Grade in an Anthem

When pulling a long grade and the speed drops down to around 50 mph do you keep the petal to the floor until you reach the top and start to regain speed? This is my only diesel experience with the exception of a Ford 6.0 and we know what that was like.
__________________
Mike & Chris with pals Gatsby & Lucky
2017 Anthem 44B Gold Ribbon
2013 Honda CRV
2013 Harley RG on a HydraLift
Mike&Chris is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-08-2016, 06:34 AM   #2
Senior Member
 
brobox's Avatar


 
Entegra Owners Club
Join Date: Apr 2007
Location: SW FL
Posts: 24,181
I normally start down shifting if the RPM's start dropping and the Allison is not downshifting fast enough for me. Once you loose the RPM on a long grade, it is going to be slow going before reaching the top.
__________________
Chuck in SW FL
Digital 2021 Cornerstone "B"
A "Digital" 2019 Cornerstone "B" Traded
A "Classic" 2014 Anthem 42 RBQ---Sold
brobox is online now   Reply With Quote
Old 06-08-2016, 06:41 AM   #3
Senior Member
 
Tall Tex's Avatar
 
Join Date: Feb 2016
Location: San Antonio, TX
Posts: 635
Your Diesel engine is designed to be able to run at full throttle continuously. Just think about how off road equipment is operated. Don't baby it along. There are grades though that you want to manually down shift to hold your speed and back off the throttle a little. This would be to avoid up and down shifting which is not ideal for the transmission. Enjoy your new coach.
__________________
Larry and Stacey
2016 Entegra Anthem 42 RBQ
2016 Jeep Cherokee Trailhawk
Tall Tex is offline   Reply With Quote
Old 06-08-2016, 07:12 AM   #4
Senior Member
 
Grower15's Avatar
 
Entegra Owners Club
Spartan Chassis
Join Date: Nov 2010
Posts: 644
I was taught to keep engine at ~2000 rpm when climbing grades to keep from over heating and keep engine operating efficiently. Manually downshift as stated above to maintain 2000 rpm and keep the petal to the metal. Have never had a problem overheating.
__________________
Alec & Sheila
2016 Anthem 44A
2017 F-150 King Ranch
Grower15 is offline   Reply With Quote
Old 06-08-2016, 08:02 AM   #5
Senior Member
 
vsheetz's Avatar


 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 14,978
Quote:
Originally Posted by Grower15 View Post
I was taught to keep engine at ~2000 rpm when climbing grades to keep from over heating and keep engine operating efficiently. Manually downshift as stated above to maintain 2000 rpm and keep the petal to the metal. Have never had a problem overheating.

Agree. 2000 rpm or a bit more. You don't want to be lugging the engine. WOT is ok.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is online now   Reply With Quote
Old 06-08-2016, 08:39 AM   #6
Senior Member
 
Gary.Jones's Avatar


 
Join Date: Oct 2012
Location: Louisiana
Posts: 8,004
Blog Entries: 1
My dynasty was equipped with a 370 horse Cummins which was a little too small for that coach.... I did have to manually downshift the Allison or the Cummins would overheat, so I was concerned with what this would be like with a 450.

Well, I got to really see it in action. Usually if I know I am approaching a long upgrade, I move from my typical 62 mph up to the speed limit or maybe 70. My experience is the more revs you have at the bottom, the more revs you still have at the top. Recently, I got on the interstate out of Camp Verde, AZ heading to Tucson. Unbeknownst to me, a quarter of a mile after I got on, I started up a 3 or 4 mile 6% grade. I didn't have more than 50 mph of revs in 6th at the bottom and I never got it back. However, I kept the "pedal to the metal" the whole way up and watched the engine temp like a hawk..... And the engine temp stayed right at the same point as when it was before the hill. It did not rise. The Allison perfectly handled the load, downshifting as needed to keep the revs up. The Allison did not early shift.... It shifted when it got down to ~ 1500 revs to put the tach back to 2000. I was impressed with how well the transmission and the Cummins worked in synchrony in climbing the hill. It was the slowest climb I have encountered since I bought the Anthem. It was my fault. If I had the revs at the right point before I started I would have been very happy. The fault was mine.

Gary
__________________
Gary and Dee, Zowie and Bowie (traveling cat sibs)
2019 Cornerstone 45B, X15-605hp, Imperial, Spartan K3,
2013 Honda CR-V toad, Demco Excali-Bar II,
Demco Baseplate, Demco Toad Light system, 73 de W5Fi
Gary.Jones is offline   Reply With Quote
Old 06-08-2016, 09:46 AM   #7
Registered User
 
Join Date: Feb 2012
Location: Troy Mo
Posts: 1,951
When I had an Anthem I figured the Allison was at least as smart as I was about shifting. Keep your foot in it and let the transmission do the work. You won't hurt the engine and it won't overheat unless something else is wrong. I went over Wolf Creek pass,at 11,000 ft in CO. Several times and temp didn't get hot. Like Gary said gain a little speed if you see a long grade on a good road, otherwise hold it down and let the Allison handle the shifting. JMHO. Noel
loisjop is offline   Reply With Quote
Old 06-08-2016, 10:29 AM   #8
rbr
Senior Member
 
rbr's Avatar
 
Entegra Owners Club
Join Date: Jun 2012
Location: Naples FL/Traverse City MI
Posts: 873
Similar to what's been said above, at the Spartan Owners Academy "Big Mike" said when driving in mountains:

1) Don't use cruise control
2) Manually shift to keep climbing rpm in 1900-2100 range on an ISL engine (gear ratios are spaced such that you can't be exact with that)
3) "Let 'er eat" (his term for pedal to the floor)

I had a climb in my Anthem a few days ago over Luther Pass into the south end of Lake Tahoe where at times I was in the low 30's speed wise, even with rushing the start of climbs as mentioned above. Don't worry about it - folks that live around these kind of climbs expect to see slow trucks and RV's. One other caution - unless the law requires it (sometimes there are signs about it) don't be tempted to take a pull-out while on a long climb as you'll never get your rpm/speed back.

A related item from Big Mike:

4) Use engine braking on downhills to avoid burning up your service brakes, but don't let the engine rpm stay over 2400 for more than 5-minutes. (i.e. use your service brakes intermittently to get the speed/rpm back down)
__________________
Ron & Glenda (The Good Witch!)
2015 Entegra Anthem 42DEQ Classic
2014 Grand Cherokee toad
rbr is offline   Reply With Quote
Old 06-08-2016, 10:42 AM   #9
Senior Member
 
Join Date: Jun 2014
Location: Pollock Pines, CA
Posts: 1,081
Lots of goog info here, agreed.

One more thing...most states (and common courtesy) require you to pull to the right and activate your hazards, especially on a multi lane road if you are moving slow. My mark is 45mph. When I am below that, right lane and hazards.
__________________
John Arenz N6YBH
2017 Cornerstone 45B, 2012 JK Rubicon in tow
2014 Anthem 44B (sold)
RubiconTrail is offline   Reply With Quote
Old 06-08-2016, 10:43 AM   #10
Senior Member
 
MRUSA14's Avatar
 
Entegra Owners Club
Join Date: Nov 2012
Posts: 7,015
Quote:
Originally Posted by loisjop View Post
When I had an Anthem I figured the Allison was at least as smart as I was about shifting. Keep your foot in it and let the transmission do the work. You won't hurt the engine and it won't overheat unless something else is wrong. I went over Wolf Creek pass,at 11,000 ft in CO. Several times and temp didn't get hot. Like Gary said gain a little speed if you see a long grade on a good road, otherwise hold it down and let the Allison handle the shifting. JMHO. Noel
I agree with Noel on this. My old coach with ISC required manual shifting to keep the RPMs near 2000 in a climb, but with this ISL, the transmission really does a good job for you. On the few occasions where I have second-guessed the tranny I wound up wishing I hadn't. Just keep the throttle wide open and let the transmission shift for you.

As for Cruise control I use it uphill and it works great (more restful for the right foot), but you have to tap the brake at the top of the hill to turn cruise off so it won't overspeed you on the downhill.
__________________
Marc and Jill, Wellington FL
2013 Entegra Anthem 44SL
2018 Lincoln MKX
MRUSA14 is offline   Reply With Quote
Old 06-08-2016, 11:15 AM   #11
Senior Member
 
Gary.Jones's Avatar


 
Join Date: Oct 2012
Location: Louisiana
Posts: 8,004
Blog Entries: 1
Ron

I would personally never let my revs stay up at 2400 rpm on a downhill grade for anywhere near 5 minutes. I was initially quite concerned about how to come down a hill in a motorhome ( used to drive a 15 speed semi and so things were quite different) and asked a lot of questions. I was told by virtually everyone to use what is called "SNUB braking". Snub braking is taught to novice semi drivers in most driving schools and there are good discussions and videos of snub braking on YOUTUBE and elsewhere. In brief, it is applying the coach service brakes in a strong manner periodically, but intermittently. When my revs are up to lets say 2000-2100 on a downhill grade, even with the jake in high, I snub the speed down maybe 10 mph with each application of the service brakes..... If I am on a 7% grade, and have the jake on high, and the revs are at 2000 or 2100, that is when I apply the service brakes to decrease the coach speed maybe 10 mph or alternately, drop the revs down to 1500 revs, let off the service brakes, and let the speed gradually increase again the 10 mph at which point I snub brake again down 10 mph (a decrease of 10 mph from where-ever I am). On many steep, long mountains, with this coach and Jake, I don't have to snub brake at all, but if the revs get above the 2100 revs, I snub brake to decrease speed, and repeat. I have found it works great. But revving to 2400-2500 hundred is just too much stress on the Cummins in my experience.

Gary
__________________
Gary and Dee, Zowie and Bowie (traveling cat sibs)
2019 Cornerstone 45B, X15-605hp, Imperial, Spartan K3,
2013 Honda CR-V toad, Demco Excali-Bar II,
Demco Baseplate, Demco Toad Light system, 73 de W5Fi
Gary.Jones is offline   Reply With Quote
Old 06-08-2016, 11:34 AM   #12
rbr
Senior Member
 
rbr's Avatar
 
Entegra Owners Club
Join Date: Jun 2012
Location: Naples FL/Traverse City MI
Posts: 873
Quote:
Originally Posted by RubiconTrail View Post
Lots of goog info here, agreed.

One more thing...most states (and common courtesy) require you to pull to the right and activate your hazards, especially on a multi lane road if you are moving slow. My mark is 45mph. When I am below that, right lane and hazards.
Absolutely. Just to clarify, my reference to "pull-outs" above was a situation on a two-lane road where there are short stopping spots of extra wide shoulder. If you stop on one of those on a long climb it's very hard to get going again, but I have seen roads marked with signs like "Required to use pull-outs when 5 or more vehicles behind you".
__________________
Ron & Glenda (The Good Witch!)
2015 Entegra Anthem 42DEQ Classic
2014 Grand Cherokee toad
rbr is offline   Reply With Quote
Old 06-08-2016, 11:44 AM   #13
rbr
Senior Member
 
rbr's Avatar
 
Entegra Owners Club
Join Date: Jun 2012
Location: Naples FL/Traverse City MI
Posts: 873
Quote:
Originally Posted by Gary.Jones View Post
Ron
I would personally never let my revs stay up at 2400 rpm on a downhill grade for anywhere near 5 minutes.
Gary
My only knowledge on that subject is Big Mike's statement (Spartan tech trainer and former Cummins trainer), but so far I've kept it to far less than 5-minutes as well.

My comment "use your service brakes intermittently to get the speed/rpm back down" was referring to what you're calling "snub braking", and does work very well in conjunction with the engine brake.
__________________
Ron & Glenda (The Good Witch!)
2015 Entegra Anthem 42DEQ Classic
2014 Grand Cherokee toad
rbr is offline   Reply With Quote
Old 06-08-2016, 12:31 PM   #14
Senior Member
 
Gary.Jones's Avatar


 
Join Date: Oct 2012
Location: Louisiana
Posts: 8,004
Blog Entries: 1
Ron

We are on the same page, completely. Although it might be within the capabilities of the diesel to take the high revs, I just didn't want people to think that doing it was good or appropriate or, needed in "standard downhill procedure" so I thought I would clarify. There are a lot of newbies on here at all times (like I was a few years ago) and I just wanted them to know that you don't have to do that to descend a steep mountain safely. I'll bet if I was in your passenger seat, I would not be grabbing the arm rests!!

Gary
Gary.Jones is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
330 hp Cummins getting hot pulling a grade? mikee409 Cummins Engines 20 07-15-2014 12:37 PM
Pulling the mountains in an Anthem Magic-carpet Entegra Owner's Forum 9 04-03-2013 01:59 PM
Going down long grade, got 'Check Trans Temp' warning RV 4 2 Workhorse and Chevrolet Chassis Motorhome Forum 16 06-20-2008 07:36 AM
Pulling a 6% or 8% grade. skipsor Workhorse and Chevrolet Chassis Motorhome Forum 3 03-31-2006 05:35 PM


All times are GMT -6. The time now is 05:37 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.