Class A with the Cummins 275HP engine?
Trying to find people that has this engine in there Class A's? I have the engine out of a 2000 model Class A. Its in a 2005 Chevy Kodiak C5500. We use it to put our 40ft 16,000 lbs 5th wheel. Trying ...
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I have that engine in my 2001 Kountry Star by Neumar with the Allyson 5 speed tranny. Mine shifts from 5th to 4th at 55 mph, and 4th to 3rd around 45 mph. I say this because sometimes I do manually drop it into 3rd at 45 to keep the RPMs up. I try to keep my RPMS above 1500 when pulling hills.
Come to think of it, I had a 99 International with the 270 engine (not Navstar) and 6 speed Allyson. It would backshift to 5th at 55 and 4th at 45 with RPMs around 1500 also.
IMHO, don't wait for the engine to lug before downshifting. You are better off to keep your RPMs up by backshifting manually when you can feel the engine lugging.
When I am approaching a crest and my MPH hit 46, I upshift and then let the tranny take over. Usually, by then my RPMs are over 1800. Also actually better fuel consumption by not lugging.
Come to think of it, I had a 99 International with the 270 engine (not Navstar) and 6 speed Allyson. It would backshift to 5th at 55 and 4th at 45 with RPMs around 1500 also.
IMHO, don't wait for the engine to lug before downshifting. You are better off to keep your RPMs up by backshifting manually when you can feel the engine lugging.
When I am approaching a crest and my MPH hit 46, I upshift and then let the tranny take over. Usually, by then my RPMs are over 1800. Also actually better fuel consumption by not lugging.
