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Old 09-18-2015, 06:42 PM   #11
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I have a DT466, a 643 trans, and 4.44 rear axle and my RPM's at 55 mph are around 2200-2300.
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Old 09-18-2015, 06:58 PM   #12
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Great advice/knowledge, so much appreciated.

There are so many issues to tackle and your information is certainly valuable. My question is whether or not I can find that type of combination.

Note pad is in hand and the search continues.

Southern bus -- less rust issues
MT643 with 4.78 gears if possible, but will look for the MD3060

Looks like a Thomas over a Bluebird for my use/towing in the future.

So, Thomas, I thought was a body style. Are they all front engine units?. Does the drive shaft get in the way for tanks and other items?

What exactly is a transit style bus? And are they Highway worthy? Climb mountains and such?

What would you do, if you were to do it again, with what you know about my thoughts.
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Old 09-18-2015, 07:08 PM   #13
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Why 4.78 and not 4.11 or 4.44?
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Old 09-18-2015, 09:43 PM   #14
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Quote:
Originally Posted by EastCoastCB View Post
Why 4.78 and not 4.11 or 4.44?
He wants towing power.

The higher the gears, the more leverage is on the engine trying to pull hills.

As long as he can do 63 miles a hour without over revving the engine, he is golden.

I'm not saying that the 4.44 or the 4.11 would be bad, just may not have the same power to pull the hills without dropping to first or second gear.

To the OP

I would get a rear engine bus for your needs. Better of everything.

Rear engine buses are Heavy duty truck chassis, VS front engine buses are Medium duty truck chassis.

I have to run for a bit. I will expand more on this in a bit.

Nat
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Old 09-18-2015, 11:12 PM   #15
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Some discussion on towing especially with RE buses.
http://www.skoolie.net/forums/f13/ca...bus-10379.html
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Old 09-18-2015, 11:26 PM   #16
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mt643 is 1 to 1 in 4th, also locks up in 3rd and 4th also you will be at 68 mph at 2700 rpm with a 4.78 rear end and 11R22.5 tires, main reason I changed the rear end in my first bus to 4.10
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Old 09-18-2015, 11:50 PM   #17
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You guys are Golden. I have a bit to consider. Power, RPM's and the engine location are certainly important considerations. Thanks for the information. It may come down to what is available and scaling to what I end up getting at that point. But, you provide food for thought on what to avoid and that is the importance of the forum: Go to the Guys with the knowledge.
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Old 09-19-2015, 12:15 AM   #18
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Quote:
Originally Posted by Kubla View Post
mt643 is 1 to 1 in 4th, also locks up in 3rd and 4th also you will be at 68 mph at 2700 rpm with a 4.78 rear end and 11R22.5 tires, main reason I changed the rear end in my first bus to 4.10
Nice.

Thanks for pointing that out.

Here is the Specs sheet for the MT643.

http://www.candbsales.com/Images/Int...20mt%20643.pdf

Nat
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Old 09-19-2015, 12:57 AM   #19
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Thanks for the spec sheet.
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Old 09-19-2015, 12:58 AM   #20
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So, with the 4:10 rears, what are the advantages and disadvantages?
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