Free 7 Day Trial RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Cummins Engines
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-22-2021, 05:14 AM   #1
YC1
Senior Member
 
YC1's Avatar


 
Join Date: Jun 2011
Location: FL
Posts: 9,929
Retrain transmission after HP Uprate

I recently had my 400 ISL 2008 DPF, no DEF engine uprated by Cummins to 450 hp.

While the HP uprate was immediately felt at the fuel pedal with an increase in acceleration it was not as much as I though it might have been compared to a DigiCR module I had installed at one time.
I was not expecting drag strip performance of course and the better acceleration is nice.

After just watching a video on the Allison 3000 I was reminded that the transmission learns my driving habits.
I have not driven enough miles for it to relearn and wonder if I should find the area in my owners manual to erase its memory so it can start over.
I doubt it will have much effect but the shift points may change a bit, that is shifting at a higher rpm so I can get a bit better acceleration up to speed.

I have not tried shifting manually since changing and I turn the economy mode off most of the time.
__________________
Myron & Deborah
08 HR Endeavor 40 SKQ
400 Isl, 400 HP/// Now 450 HP
2016 Ford F150 Limited V6 with Ready Brake
YC1 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 11-24-2021, 05:53 AM   #2
Senior Member
 
CountryB's Avatar
 
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,803
Here's the instructions for manually programing the transmission "Adaptive Shift". Note that over the course of days, the transmission will automatically learn the shift pattern - but you can use this method to force a relearn.

From the Allison manual:
Attached Files
File Type: pdf Allison Trans Adaptive Shift programming.pdf (508.2 KB, 21 views)
__________________
Mike --- 2005 Beaver Patriot Thunder CAT C13 525HP --Links below to my OneDrive docs---
*SMC, Beaver, Monaco History, Problems https://1drv.ms/f/s!AtvAXw_lfqbToxXYREK9YdBP08Jn
*Monaco Wiring Diagrams https://1drv.ms/f/s!AtvAXw_lfqbTm0WTuuNqpn9a8hCh
CountryB is offline   Reply With Quote
Old 11-24-2021, 06:46 AM   #3
YC1
Senior Member
 
YC1's Avatar


 
Join Date: Jun 2011
Location: FL
Posts: 9,929
I knew if I showed my lazy side someone would look it up for me.

Thanks so much for posting it.

May have to put some slicks on after the HP Uprate.

This thing would not get out of its own way with the 400 hp. I remember the salesman remarking how it climbed the steep hill back to their sales lot. It was doing just ok. The smile left his face for a time when I told him the Workhorse V8 would easily outrun it. I didn't tell him at 4 mpg and half the weight of course. But he knew once I test drove a DP the check book would come out.

That is far more complicated than I remember. No way I can perform all of that on Florida Highways. Too busy and too flat.

So I will just continue like the tree just went green, stomp it and then use both feet on the brakes.
__________________
Myron & Deborah
08 HR Endeavor 40 SKQ
400 Isl, 400 HP/// Now 450 HP
2016 Ford F150 Limited V6 with Ready Brake
YC1 is offline   Reply With Quote
Old 11-24-2021, 10:39 AM   #4
Senior Member
 
Alpine36's Avatar


 
Alpine Owners Club
Join Date: Oct 2019
Location: Hoodsport Wa
Posts: 1,859
Don't be surprised if your maximum shift points don't actually decrease in rpm slightly, since "turning them up" usually lowers the max torque and hp rpm range. The upside is usually a slight increase in mpg IF you can keep your foot off the floor. Almost every "before and after" diesel dyno test will show the increased hp and torque sweet spot in a slightly lower rpm range.
__________________
2000 Alpine 36 FDS #74058
04 Jeep Wrangler TJ
"On the road to find out..."
Alpine36 is offline   Reply With Quote
Old 11-24-2021, 10:43 PM   #5
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 24,418
Quote:
Originally Posted by YC1 View Post
I knew if I showed my lazy side someone would look it up for me.

Thanks so much for posting it.

May have to put some slicks on after the HP Uprate.

This thing would not get out of its own way with the 400 hp. I remember the salesman remarking how it climbed the steep hill back to their sales lot. It was doing just ok. The smile left his face for a time when I told him the Workhorse V8 would easily outrun it. I didn't tell him at 4 mpg and half the weight of course. But he knew once I test drove a DP the check book would come out.

That is far more complicated than I remember. No way I can perform all of that on Florida Highways. Too busy and too flat.

So I will just continue like the tree just went green, stomp it and then use both feet on the brakes.
Ha, you'll be right at home doing the reset on I 75.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
Ray,IN is offline   Reply With Quote
Old 11-25-2021, 07:29 AM   #6
YC1
Senior Member
 
YC1's Avatar


 
Join Date: Jun 2011
Location: FL
Posts: 9,929
That's no joke.

It is Daytona for sure. Yellow flag, nope. Red flag. Fresh stop and now the pace car is out front again, ooops. No wait, the pace car just rear ended the slow poke in the left lane.

Caution flags out again. Oh heck, now a pit stop is needed. Penalty for overshooting the parking spot. Ten minute penalty.

Maybe this post needs to be moved to Humor section. Nah, this is not funny. The brakes get a work out and so does my laundry.
__________________
Myron & Deborah
08 HR Endeavor 40 SKQ
400 Isl, 400 HP/// Now 450 HP
2016 Ford F150 Limited V6 with Ready Brake
YC1 is offline   Reply With Quote
Reply

Tags
transmission



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
How to test Transmission Cooler - transmission running hot, engine temps normal CountryB Allison Transmission Forum 9 10-10-2019 02:01 PM
Transmission Temperature and a Deep Allison Transmission Pan vettenuts Workhorse and Chevrolet Chassis Motorhome Forum 14 11-08-2018 03:44 PM
Mech. severely overfilled transmission fluid, how long until transmission is damaged? micd MH-General Discussions & Problems 6 04-03-2018 06:49 PM
Standard transmission or Automatic transmission Aguyfromcalg Just Conversation 27 06-12-2011 11:16 AM
Transmission braking causes transmission breaking obbm Workhorse and Chevrolet Chassis Motorhome Forum 38 05-08-2010 08:05 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 05:11 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.