Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 08-28-2014, 08:05 PM   #1
Senior Member
 
Matchayan's Avatar
 
Monaco Owners Club
Join Date: Dec 2011
Posts: 170
Upgrade ISB 340HP tp 350HP

We have a 2011 Monaco Cayman with a ISB 340 hp, 660fp of torque, the motor was built in 2008. It was a little sluggish pulling our Toad over the Rocky Mountains so I asked Cummins if there was anything I could do about it. They said the could increase it to 350 HP and 750 fp of torque with out affecting anything including the warrantee. They did it today and charged me $360.00. On the drive home I was impressed with what 90 extra pounds of torque did. It also shifted into 6th gear faster than usual. Will find out how it goes over the Rockies next month.
__________________

__________________
Matchayan
2011 Monaco Cayman 36PFT, Cummins 340 600w of solar 4 6v batts, residential fridge
2011 Colorado Toad, Blue ox Aventa Tow Bar
Matchayan 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 08-28-2014, 08:09 PM   #2
Senior Member
 
Finally's Avatar
 
Join Date: Aug 2013
Location: Florida
Posts: 1,111
What about the transmission? What is it rated for?
__________________

__________________
Finally!!!
Shawn and Donna
2014 Entegra Aspire 42RBQ, 2016 Mazda MX5 Miata
Finally is offline   Reply With Quote
Old 08-28-2014, 08:25 PM   #3
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 13,713
Quote:
Originally Posted by Finally View Post
What about the transmission? What is it rated for?
Any Cummins factory-authorized ECM uprates include the drivetrain.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Old 08-28-2014, 08:48 PM   #4
NRF
Senior Member
 
NRF's Avatar
 
Monaco Owners Club
Join Date: Oct 2012
Location: Friendswood, Texas
Posts: 166
I also own a 2011 Cayman. That sounds great! Let me know what I need to do to get this done to my coach!
__________________
NRF is offline   Reply With Quote
Old 08-28-2014, 08:49 PM   #5
Senior Member
 
Join Date: Apr 2010
Location: SW, Michigan
Posts: 628
Quote:
Originally Posted by Finally View Post
What about the transmission? What is it rated for?
Allison 2500MH is rated for 895 torque & upto 340 hp
Allison 3000 is rated for between 1200-1695 torque

Allison Transmission Home
__________________
2010 Allegro RED 36 QSA
GMC Envoy 4x4
SW Michigan to Alaska in 2015
okgc is offline   Reply With Quote
Old 08-28-2014, 08:57 PM   #6
Senior Member
 
ChasA's Avatar
 
Join Date: Mar 2007
Location: Apex, NC
Posts: 1,857
I doubt Ray, In statement. The engine and transmission don't come together until the chassis is built . I asked at my local Cummins/Onan. They said it would void the warranty. My 340 HP Cummins Is a dog getting to 45 mph on an on ramp. Every thing I can find says the tranny is the limiting factor.
__________________
2010 Winnebago Journey Express 34Y
2010 Freightliner XCS (mfd 9/'09)
'07 Saturn Vue V6
ChasA is offline   Reply With Quote
Old 08-28-2014, 09:36 PM   #7
Senior Member
 
djbmsu's Avatar
 
Join Date: Nov 2011
Location: Charlotte Harbor, FL
Posts: 1,806
"I asked Cummins if there was anything I could do about it. They said the could increase it to 350 HP and 750 fp of torque with out affecting anything including the warrantee"

Seems that it appears it is both authorized and does not effect the warrentee
__________________
Don and Nancy
[2014 40QBH Phaeton, 2015 Buick Enclave, 2yr old sisters Sara n Kaycee, Havanese, Two Segways
djbmsu is offline   Reply With Quote
Old 08-28-2014, 10:44 PM   #8
Senior Member
 
Fleetwood Owners Club
Spartan Chassis
Join Date: Mar 2011
Posts: 297
I have an 09 isbxt which is factory rated at 350/750 in my 2010 Discovery. I did the Banks upgrade which gives me 400/850. It is a mild increase, and there is no mountain that I haven't been able to take comfortably. I can usually pass almost all 18 wheelers. I pull a 5K toad, and I usually travel at or near max gross weight. My coach has the 3000mh tranny. I have nearly 50k miles since the upgrade with no issues. The upgrade including the banks engine monitor and installation was about $1800. I am quite pleased with the upgrade.
__________________
Cbones is offline   Reply With Quote
Old 08-28-2014, 11:44 PM   #9
Senior Member
 
capnqball's Avatar


 
Winnebago Owners Club
Join Date: Mar 2012
Location: NW OREGON
Posts: 260
I asked my local Allison distributor/service shop if I can turn up my 340/660 and was told no dice: 2500 series trans will not take it and warranty is void if done. That's from Pacific Power Products in Ridgefield WA. I spoke with an owner of a Tiffin RED 2012 who had it done by Cummins and was experiencing surging in his tranny. He had it reversed after that. YMMV
__________________
Ron in NW Oregon
2014 Ventana LE 3847
2008 Honda CRV AWD
capnqball is offline   Reply With Quote
Old 08-29-2014, 09:22 AM   #10
Senior Member
 
Matchayan's Avatar
 
Monaco Owners Club
Join Date: Dec 2011
Posts: 170
Before I did the upgrade at Cummins I went to Allison in Coburg , Oregon, they changed some of my shift points and told me as long as I stayed below 850 lbs of torque I would not have a problem with the 2500 tranny. They did say that if you exceed the 850 torque that the tranny would lock up and your warrantee would be void. They also told me that there are several installations with the 2500 tranny and a Cummins 350/750 set up from the factory.
__________________
Matchayan
2011 Monaco Cayman 36PFT, Cummins 340 600w of solar 4 6v batts, residential fridge
2011 Colorado Toad, Blue ox Aventa Tow Bar
Matchayan is offline   Reply With Quote
Old 08-29-2014, 09:27 AM   #11
Senior Member
 
Matchayan's Avatar
 
Monaco Owners Club
Join Date: Dec 2011
Posts: 170
NRF i just went to the local Cummins dealer and asked , they would not increase it beyond that due to the 2500 tranny. I drove the coach home 50 miles and experienced no noticeable problems, time will tell.
__________________
Matchayan
2011 Monaco Cayman 36PFT, Cummins 340 600w of solar 4 6v batts, residential fridge
2011 Colorado Toad, Blue ox Aventa Tow Bar
Matchayan is offline   Reply With Quote
Old 08-29-2014, 05:24 PM   #12
Senior Member
 
Cat320's Avatar
 
Fleetwood Owners Club
American Coach Owners Club
Join Date: Mar 2011
Posts: 4,761
Quote:
Originally Posted by okgc View Post
Allison 2500MH is rated for 895 torque & upto 340 hp
Allison 3000 is rated for between 1200-1695 torque

Allison Transmission Home
We recently attended a rally where the Allison Rep stated the max power for a 3000 MH trans was 450 HP and 1,250 ft/lbs of torque.
__________________
2014 American Eagle 45T
DD 500
Pulling a Honda CRV
Cat320 is offline   Reply With Quote
Old 08-30-2014, 12:51 PM   #13
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 13,713
Quote:
Originally Posted by Cat320 View Post
We recently attended a rally where the Allison Rep stated the max power for a 3000 MH trans was 450 HP and 1,250 ft/lbs of torque.
That is correct per the Allison Motorhome Transmission specs. pdf: http://www.allisontransmission.com/d...s.pdf?sfvrsn=4

And ChasA, is also correct, according to that same pdf. My initial post was wrong.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Old 09-07-2014, 05:40 PM   #14
Senior Member
 
phil57's Avatar
 
Join Date: May 2012
Posts: 275
so is it ok to do this? If i don't exceed my GCVW and don't run 80 MPH is this going to ruin my transmission?
__________________

__________________
phil57 is offline   Reply With Quote
Reply

Tags
upgrade



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
Fan-Tastic Fan upgrade ....NOT jerichorick Winnebago Industries Owner's Forum 8 03-02-2015 12:14 PM
ISB Tuners DegoRed Cummins Engines 9 05-02-2014 04:05 PM
Electric Upgrade Opinions dempen Forest River Owners Forum 2 04-23-2014 02:09 PM
KVH R-5 upgrade Jeep trekker Technology: Internet, TV, Satellite, Cell Phones, etc. 7 02-23-2014 09:53 AM
Server Upgrade tonight (saturday) Janet H Forum 101 | Announcements | Member Concerns 1 01-04-2014 12:41 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:17 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.