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Old 11-05-2017, 11:11 PM   #11
Skoolie
 
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Join Date: Oct 2017
Posts: 143
Year: 1999
Coachwork: BlueBird
Chassis: TC1000 HandyBus
Engine: 5.9L Cummings ISB
Rated Cap: 26 foot
My bus has a 1:1 final high gear (4th) in its AT545, 3.56:1 in the rear-end, and 19.5"-rim wheels (I hear they are 32" tall tires).

I can do 70-MPH @ about 2500-RMP on flat ground.
I can do over 70-MPH @ 2500-RMP downhill.

I cruise nicely with gentle fuel-petal at about 63-MPH @ about 2200-PRM on flat ground.

I don't remember for sure, but I think it's about 2000-RPM @ 60-MPH on flat ground.

Factor in a hill and all this changes.....

I know this motor has the torque to cruise between 1600-RMP & 1800-RPM.
Wish I had overdrive...
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Old 01-12-2018, 03:10 PM   #12
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Join Date: Feb 2017
Location: UT
Posts: 5
Year: 2002
Coachwork: International Amtran
Chassis: Amtran Genisis FE 30FT
Engine: DT466E, Allison 2500
Rated Cap: 38
Started out with a 5.57 ratio. Was at 2500 rpm at around 65mph. Switched to a 4.67 ration and now at 65 I run around 2000 rpm. Glad I made the switch.
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Old 03-06-2018, 10:53 PM   #13
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Join Date: May 2006
Location: mid Mo.
Posts: 257
Year: 1976
Coachwork: bluebird
Chassis: F33695
Engine: 427 chevy
Rated Cap: 84
I have 6:83 gears with 10:00x20 tires turning my gas 427 at 3800 at 70 mph (48 inch tires), i would have thought you guys with an overdrive transmission would be able to run 70 mph. was looking into changing mine to a 3060 allison, have 640 now but it looks like that won't help much
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Old 03-07-2018, 06:19 AM   #14
Skoolie
 
Join Date: Dec 2017
Location: southern maine
Posts: 105
Year: 2010
Coachwork: Coach & Equipment MFG
Chassis: ford E350 superduty
Engine: 5.4 liter v8
Rated Cap: 7 passenger
2010 ford E350 super duty cutaway, 9 pass bus body with a wheelchair lift
5.4 L gas
5-speed auto ( ratios from 3.11 in first to .71 in od)
rearend 4.1
16" tires Lt 245/75/16
about 2100 rpm's at 70 mph
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Old 03-07-2018, 07:56 AM   #15
Bus Nut
 
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Join Date: Dec 2017
Location: Frisco, Texas
Posts: 793
Year: 1998
Coachwork: Thomas
Chassis: International 3800
Engine: Dt466e
Rated Cap: 71
Quote:
Originally Posted by johnbloem1974 View Post
DT466E AT545 tranny. 295/75 R22.5 tires. 70MPH @ 2600RPM. Prefer to cruise around 60-65

Sent from my SM-G900V using Tapatalk
My dt466 / mt643 combo tops out at 65 @2600 rpm. Not sure about ratio or hp though
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