 |
|
08-28-2014, 07:05 PM
|
#1
|
|
Senior Member
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
|
|
|
 |
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!
|
|
08-28-2014, 07:09 PM
|
#2
|
|
Senior Member
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
|
|
|
|
|
08-28-2014, 07:25 PM
|
#3
|
|
Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,903
|
Quote:
Originally Posted by Finally
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 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
|
|
|
|
|
08-28-2014, 07:48 PM
|
#4
|
|
Senior Member
Monaco Owners Club
Join Date: Oct 2012
Location: Friendswood, Texas
Posts: 193
|
I also own a 2011 Cayman. That sounds great! Let me know what I need to do to get this done to my coach!
|
|
|
|
|
08-28-2014, 07:49 PM
|
#5
|
|
Senior Member
Join Date: Apr 2010
Location: SW, Michigan
Posts: 629
|
Quote:
Originally Posted by Finally
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
|
|
|
|
|
08-28-2014, 07:57 PM
|
#6
|
|
Senior Member
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
|
|
|
|
|
08-28-2014, 08:36 PM
|
#7
|
|
Senior Member
Join Date: Nov 2011
Location: Polk City Florida
Posts: 1,930
|
"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
[2018 Tiffin Bus 40 AP, 2022 Ford Edge ST , 9yr old sisters Sara n Kaycee, Havanese, Electric Catrike
|
|
|
|
|
08-28-2014, 09:44 PM
|
#8
|
|
Senior Member
Fleetwood Owners Club Spartan Chassis
Join Date: Mar 2011
Posts: 303
|
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.
|
|
|
|
|
08-28-2014, 10:44 PM
|
#9
|
|
Senior Member
Join Date: Mar 2012
Location: NW OREGON
Posts: 537
|
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
2017 Ventana 3436
2021 Chevrolet Spark LT
|
|
|
|
|
08-29-2014, 08:22 AM
|
#10
|
|
Senior Member
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
|
|
|
|
|
08-29-2014, 08:27 AM
|
#11
|
|
Senior Member
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
|
|
|
|
|
08-29-2014, 04:24 PM
|
#12
|
|
Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: Mar 2011
Posts: 6,768
|
Quote:
Originally Posted by okgc
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 13, 500 HP
Pulling a Honda CRV
|
|
|
|
|
08-30-2014, 11:51 AM
|
#13
|
|
Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,903
|
Quote:
Originally Posted by Cat320
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 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
|
|
|
|
|
09-07-2014, 04:40 PM
|
#14
|
|
Senior Member
Join Date: May 2012
Posts: 284
|
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?
|
|
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Linear Mode
