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Old 04-20-2015, 10:59 PM   #11
Bus Nut
 
Join Date: Feb 2015
Location: Cincinnati, Ohio
Posts: 539
Year: 2000
Coachwork: Blue Bird
Chassis: International
Engine: TE 444
Rated Cap: 12
I got my differential from
MICHIGAN TRUCK PARTS
Ph: (734) 722-3800
Fax: (734) 729-2363
38658 Ford Rd.
Westland, Mi 48185
had to do a few google searches to find it and one close enough to pickup since shipping would be at least 200 dollars
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Old 04-21-2015, 03:11 PM   #12
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Join Date: Nov 2011
Location: Sault Ste. Marie, Ontario
Posts: 1,439
Year: 1997
Coachwork: Thomas
Chassis: B3800 Short bus
Engine: T444E
Rated Cap: 36
How were the prices and service at Michigan Truck Parts? I'm often down in that area and am looking for a locking diff. They may be an option..
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Old 04-24-2015, 09:46 PM   #13
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Join Date: Feb 2015
Location: Cincinnati, Ohio
Posts: 539
Year: 2000
Coachwork: Blue Bird
Chassis: International
Engine: TE 444
Rated Cap: 12
I paid 495 plus 100 core charge (old one is still in the bus) so $630 with tax, pretty easy to deal with
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Old 04-25-2015, 09:27 AM   #14
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Join Date: Nov 2011
Location: Sault Ste. Marie, Ontario
Posts: 1,439
Year: 1997
Coachwork: Thomas
Chassis: B3800 Short bus
Engine: T444E
Rated Cap: 36
Excellent! That's a very reasonable price. I've seen some prices online upwards of $1000.
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Old 04-25-2015, 06:04 PM   #15
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Join Date: Feb 2015
Location: North carolina
Posts: 651
Year: 1986
Coachwork: Thomas
Chassis: Ford
Engine: Detroit 8.2
Rated Cap: 60 bodies
I have an 86 Wayne with the 8.2, at-545 , and an eaton rear with 6.50 gear's and can't get any local garages or mechanic's to give me advice on what gear's to change to? The older man at the bus barn that sold it to me said I could adjust the governors but I would burn up the rear end but he was not allowed to tell me anymore.
I can only do 45-49 right now and would love to do 55-65. I can and am willing to do any changes myself but no one will recommend a ratio for me to change to? I have all info including full maitenance record's from the school system including all data plates.
Thank's for any advice.
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Old 04-26-2015, 01:25 AM   #16
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Join Date: Feb 2015
Location: Cincinnati, Ohio
Posts: 539
Year: 2000
Coachwork: Blue Bird
Chassis: International
Engine: TE 444
Rated Cap: 12
with a 4.78 rear end, 10R-22.5 tires and a AT545 transmission, my bus does 62 mph at 2700 rpm, if it had a lock up torque converter eliminating transmission slippage, it would do 68 mph. 2700 rpm is pretty much max speed for the engine, a DT466

you need to find out exactly which rear end you have to buy another differential, adjusting the governors for more engine speed would most likely burn up the engine, not the rear end
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Old 04-26-2015, 10:09 AM   #17
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Join Date: Aug 2011
Location: Stony Plain Alberta Canada
Posts: 2,937
Year: 1992
Coachwork: Bluebird
Chassis: TC2000 FE
Engine: 190hp 5.9 Cummins
Rated Cap: 72
Mine had a 5.9 Cummins, 4.44 rear end gears, and a AT545.

2500 RPM at 62 mph or 100kmh.

Poor engine hated it as the torque curve drops after 1600 RPM.

Nat
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Old 04-26-2015, 01:50 PM   #18
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Join Date: Feb 2015
Location: North carolina
Posts: 651
Year: 1986
Coachwork: Thomas
Chassis: Ford
Engine: Detroit 8.2
Rated Cap: 60 bodies
Thank's for the advice! The bus barn man was speaking from the advice he had given his church for the bus's they had bought and they did one as advised with no problem's but they didn't do the next two and have constant problem's?
I am looking for option's cause I can only afford to do this once or the other main project's that require money are going to suffer? The rear end is eaton model 16s and the original bus barn document's say 6.50 gear's with an at-545 and an 8.2 non turbo and 9r20 tires.
The only other thing I don't like is that whether on flat ground or uphill the tranny shift's through the gear's and you are in drive before you ever get past 20 mph? I still have not removed the blocker plate on the shifter but I am ready to! Then I can manually stretch each gear more before it shift's? That would help with low end but top end is what it is until I change something?
Thank's for the help gentlemen.
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Old 04-26-2015, 10:39 PM   #19
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Join Date: Nov 2003
Location: Twin Falls, Idaho
Posts: 808
Rear axle units

Most heavy axles can be interchanged. Most axles are about the same size. My Crown needed a different ratio axle. I got a 1990 freightliner axle for $1200. Everything was good. Got newer gears, correct ratio.. 3:73, bigger brakes, newer slack adjusters and very good unit.. Frank
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Old 05-07-2015, 10:07 PM   #20
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Posts: 1
Smile my experience

Recent differential swap 3-30-2015.

1999 Bluebird 3800 9 window
DT466E
MT643
N175 Rear w/4:78
255/75R 22.5
55 MPH @ 2500 RPM

Swap to 3:54
65 MPH @ 2300
75 MPH @ 2500

Cost $550 +$150 core
VanderHaags Inc.

Easy Swap like a Ford 9", just bigger.
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