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Old 07-28-2012, 09:58 AM   #21
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Year: 1993
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Chassis: International
Engine: DT466/MT643
Rated Cap: 77
Re: Fuel MPG with DT466 and AT545???

Might need driveshaft work...I have no idea of the relative lengths of an AT545 and an MT643. May need a new shift cable...if for no other reason than you might well end up destroying the old one getting it out. Might need the speedometer drive gear changed. I have to say that I have never seen an AT545 behind a DT466!

My DT466/MT643 with highway gears (1900RPM at 60MPH, I think 4.10's) gets 10-11MPG on a highway run through relatively flat terrain, 60-65MPH. Running through the Poconos dropped it to between 8 and 9MPG.
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Old 07-28-2012, 08:00 PM   #22
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Re: Fuel MPG with DT466 and AT545???

Quote:
Originally Posted by Jarlaxle
Might need driveshaft work...I have no idea of the relative lengths of an AT545 and an MT643. May need a new shift cable...if for no other reason than you might well end up destroying the old one getting it out. Might need the speedometer drive gear changed. I have to say that I have never seen an AT545 behind a DT466!

My DT466/MT643 with highway gears (1900RPM at 60MPH, I think 4.10's) gets 10-11MPG on a highway run through relatively flat terrain, 60-65MPH. Running through the Poconos dropped it to between 8 and 9MPG.
I think cable and shifter are the same. My engine is 190 hp. I've seen plenty of 545s behind a 466. I think the beabcounters ordered those buses.
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Old 12-27-2012, 12:54 PM   #23
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Year: 1995
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Re: Fuel MPG with DT466 and AT545???

Looks like my 94 International 3800 short-bus DT466/AT545 gets about 10 mpg. This was calculated from the trip bringing it home from the dealer. It was about a 100 mile drive. I tried to keep the speed down to about 55 but it wanted to sneak up to 60+
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