06-22-2013, 02:45 PM
Lakota Traveler460 to 5.9 Cummins
Hello all, Don here with a question...or two. I replaced a 460 gas engine with a cummins 5.9 diesel with 22K miles on a major. It is rated at 200hp.
My question is this: I have a 545 allison with no overdrive.
My tire diameter is 34".
I have 19.5 wheels.
I weigh over 20K.
Does anyone out there have a diesel with those size tires and no o/d ?
If so what rear end ratio is being used.
The wrecking yard sold me 3:21 gears and they are way too high. I am coming up with 3:73 gears. If there is a coach out there with these components will you let me know what rear end ratio you have. Thanks, Don
06-22-2013, 05:24 PM
Gary Carter5.9B Cummins, 542 Allison, 8r19.5 tires, and 3.73 Rear End. This is a very common Barth Breakaway configuration.
06-23-2013, 07:37 PM
Lakota TravelerThanks Gary, it sounds like I might be in there with the 3:73 gears. What RPM do you guys run with this running gear.
Am thinking about getting a little more HP and RPM. I have the inline fuel pump and after cooled.
I believe mine is vacuum operated off the fuel pump. It seems to be frozen and no vacuum present. Any idea's??? Don
Hey, we go over to Yuma every winter. Have 5 friends over there....
06-23-2013, 07:46 PM
RustyGary and I have the same diffy, but different trannies. I run at around 2100 RPM at 60 in straight drive (1:1), mentally correcting for the error in my tach.
Rusty
"StaRV II"'94 28' Breakaway: MilSpec AMG 6.5L TD 230HP
Nelson and Chester, not-spoiled Golden Retrievers
Sometimes I think we're alone in the universe, and sometimes I think we're not.
In either case the idea is quite staggering. - Arthur C. Clarke
It was a woman who drove me to drink, and I've been searching thirty years to find her and thank her - W. C. Fields
06-23-2013, 08:23 PM
Lakota TravelerGood info guys. I wonder if anyone has replaced a 545 with a later model OD unit. I know there is computer issues but is there a swap available?
What engine are you running 2100 @ 60 MPH?
I would like to get same results. I am getting over 10MPG but was climbing hills at 10MPH in 1st gear. Had trans heating issues also...Don
06-23-2013, 09:24 PM
RustyI have the AMG 6.5L TD 230HP, 4L80E tranny.
Rusty
"StaRV II"'94 28' Breakaway: MilSpec AMG 6.5L TD 230HP
Nelson and Chester, not-spoiled Golden Retrievers
Sometimes I think we're alone in the universe, and sometimes I think we're not.
In either case the idea is quite staggering. - Arthur C. Clarke
It was a woman who drove me to drink, and I've been searching thirty years to find her and thank her - W. C. Fields
06-24-2013, 01:11 AM
Gary CarterI replaced my 542 with an allison 2000. Do a search and you will find what I wrote back then.
With the 542 I ran about 2200 at 60 do to transmission slippage and almost 2600 to do 65. And yes it would overheat on a long montain grade.
I'm not sure what you are talking about with vacuum off the engine. There is no vacuum with a diesel unless some sort of generator is added.