Luxury Coach Lifestyles - View Single Post

Jim Crall · 12-03-2000, 10:59 PM

I have A 38 1/2 ft. 1977 Newell. It had a Cummins 555 engine in it, and the crankshaft failed resulting in major damage. With the 555 engine, the coach was underpowered when driving up hills and mountains were almost impossible.

I am considering putting a Cummins ISC 350 H.P. with an Allison M3066 trans. in it. Would you advise me if this is a good choice, would I have plenty of mountain power,could I use my original trans.( I believe is an Allison 643 ), what about my gear ratio. Please give me any information you can regarding the best engine replacment with plenty of power. If there is anyone out there who has made an engine and/or transmission upgrade, please let me know what you have and if you are pleased with the results.

12-03-2000, 10:59 PM	#1
Jim Crall New Member Join Date: Sep 2007 Posts: 1	Suggestions on engine replacement I have A 38 1/2 ft. 1977 Newell. It had a Cummins 555 engine in it, and the crankshaft failed resulting in major damage. With the 555 engine, the coach was underpowered when driving up hills and mountains were almost impossible. I am considering putting a Cummins ISC 350 H.P. with an Allison M3066 trans. in it. Would you advise me if this is a good choice, would I have plenty of mountain power,could I use my original trans.( I believe is an Allison 643 ), what about my gear ratio. Please give me any information you can regarding the best engine replacment with plenty of power. If there is anyone out there who has made an engine and/or transmission upgrade, please let me know what you have and if you are pleased with the results.