Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
 
Old 10-02-2023, 05:33 PM   #1
Skoolie
 
Join Date: May 2023
Location: Canada
Posts: 142
Year: 2001
Coachwork: BlueBird
Chassis: International 3800
Engine: T444E, Allison 2000
Rated Cap: 72
Diff regear 2001 t444e 2000 series

Specs.

2001 T444 195hp
Allison 2000
Diff. N190 5.63 ratio.

At 100kph bus runs at 2200 RPM ballpark.

Issue, heard growling from rear end. Diff pulled. Found rear diff has been worked on before and was not set up properly. Ring and Pinion screwed, backlash not set proper and now worn stupid. Currently looking for a N190 diff. but has anyone regeared to a taller ratio with the driveline combo I have?

Currently I feel it is adequate with the ratio I have even with a full length bus. Looks like I can drop to a 5.38 or a 5.11. Each drop will lower my RPM by 100 or so. Kinda kill two birds with one stone at this point. May also bump the power to 210 while at it. Also the gear ratio opens up a few more options on used diffs if found locally.

Any feed back from anyone that has regeared the drivetrain combo I have. I know alot of folks have regeared buses with the 545 Allison

Omnibot2000 is offline   Reply With Quote
Old 10-03-2023, 04:15 AM   #2
Bus Nut
 
nikitis's Avatar
 
Join Date: Jun 2023
Location: South Carolina
Posts: 361
Year: 1995
Coachwork: Thomas
Chassis: International 3800
Engine: T444E
Rated Cap: 29
The more you gear for top speed the hotter it'll make the 545. You may need a transmission cooler upgrade. It has no overdrive so the gains are minimal. You'll need accurate temp sensor with your transmission more with a gear change. If you gear more for torque its better on the 545 temp wise.
nikitis is offline   Reply With Quote
Old 10-03-2023, 06:33 AM   #3
Skoolie
 
Join Date: May 2023
Location: Canada
Posts: 142
Year: 2001
Coachwork: BlueBird
Chassis: International 3800
Engine: T444E, Allison 2000
Rated Cap: 72
Quote:
Originally Posted by nikitis View Post
The more you gear for top speed the hotter it'll make the 545. You may need a transmission cooler upgrade. It has no overdrive so the gains are minimal. You'll need accurate temp sensor with your transmission more with a gear change. If you gear more for torque its better on the 545 temp wise.
I'm running a 2000 series
Omnibot2000 is offline   Reply With Quote
Old 10-03-2023, 07:28 AM   #4
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,326
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
in my opinion a 5.3x is about the best mix on an overdrive trans assuming you are running 11R22.5 tires.. smaller tires you may want to gear a little taller.. the T444E will lug below about 1900 RPM or so.. it likes to rev a bit more than an inline 6.. but rev too high and it just makes heat.. runs the fan all the time..



the shorter the gear the better you climb hills, the taller the gear (to a point) the less heat and better MPG.. assuming you arent lugging..



you *CAN* run the 444E at higher RPM's to wind out a gear to help overcome the tall overdrive drop of 1:1 to 0.74:1. if you have the software ot bump the HP you can also bump your RPM.. I have mine set at 2800 where i can wind out 4th gear a bit more before letting it shift to 5.. if oyu choose to gear taller, your 4th gear is a bit higher top speed.. there are times when im travelling up anbd down hills i just turn the OD off and still can maintain a decent road speed till i get out of the twisty curvy up n down..
cadillackid is offline   Reply With Quote
Old 10-03-2023, 09:34 AM   #5
Skoolie
 
Join Date: May 2023
Location: Canada
Posts: 142
Year: 2001
Coachwork: BlueBird
Chassis: International 3800
Engine: T444E, Allison 2000
Rated Cap: 72
Quote:
Originally Posted by cadillackid View Post
in my opinion a 5.3x is about the best mix on an overdrive trans assuming you are running 11R22.5 tires.. smaller tires you may want to gear a little taller.. the T444E will lug below about 1900 RPM or so.. it likes to rev a bit more than an inline 6.. but rev too high and it just makes heat.. runs the fan all the time..



the shorter the gear the better you climb hills, the taller the gear (to a point) the less heat and better MPG.. assuming you arent lugging..



you *CAN* run the 444E at higher RPM's to wind out a gear to help overcome the tall overdrive drop of 1:1 to 0.74:1. if you have the software ot bump the HP you can also bump your RPM.. I have mine set at 2800 where i can wind out 4th gear a bit more before letting it shift to 5.. if oyu choose to gear taller, your 4th gear is a bit higher top speed.. there are times when im travelling up anbd down hills i just turn the OD off and still can maintain a decent road speed till i get out of the twisty curvy up n down..
That is exactly what I was looking for, first hand experience. Mostly I will drive the flat plains but I anticipate driving some hills in the future. Locking it in drive on the hill will work for me. Currently I see no limitations with the drivetrain. This opens up used diff options and not bound to just the current ratio.

Thanks
Omnibot2000 is offline   Reply With Quote
Old 10-03-2023, 02:43 PM   #6
Bus Nut
 
sportyrick's Avatar
 
Join Date: May 2006
Location: mid Mo.
Posts: 801
Year: 1976
Coachwork: bluebird
Chassis: F33695
Engine: 427 chevy converted to 466
Rated Cap: 84
unbelieveable mileage

Just returned from "Random Acts of Camping" in the flatland's of Indiana, had a great time. I have a DT466 mechanical turned up, a 3060 Allison and a 4.33 rearend with low pro 24.5 tires (@42" tall, same size as 10:00-20's). Running those flats at 55 or 60 was a breeze, I was in fifth gear most of the time just ambling along at @ 1600 rpm. My engine tranny combination is set up so it doesn't go into 6th gear until 60 mph so I left it in 5th a lot. Joan and I couldn't believe we ran 16 MPG on this trip, checked twice, those flats are easy on fuel. I included a pic of my dash from another trip showing my 1550 rpm at 70 mph. My oil pressure shows a little high because it's not the right sender, who cares, I'm interested in whether I have oil pressure or not, not the exact amount. Boost is low because I am not climbing a hill, EGT is about right, I run 1000 degrees on a good climb or when I am pushing it to 75 or 80 mph. Rear end usually runs about 130 degrees, tranny usually runs in the yellow because the water is cooled so well with the large radiator. I think I would go with a little higher rear end if I had to do it over again, maybe 4.50 to 5.10 for better hill climbing or even higher if I was pulling something, otherwise it's perfect.
Attached Thumbnails
dashpic2023.jpg  
sportyrick is offline   Reply With Quote
Old 10-03-2023, 02:54 PM   #7
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,326
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
thos long stroke inline 6 engines LOVE the mid to upper teens cruise RPM.. that sounds about like the perfect gearing setup!
cadillackid is offline   Reply With Quote
Old 10-03-2023, 05:23 PM   #8
Skoolie
 
Join Date: May 2023
Location: Canada
Posts: 142
Year: 2001
Coachwork: BlueBird
Chassis: International 3800
Engine: T444E, Allison 2000
Rated Cap: 72
Wow. 16mpg. I think if I get 10 mpg with my 444 I will settle on that.
Omnibot2000 is offline   Reply With Quote
Old 10-03-2023, 07:39 PM   #9
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,326
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
I get 11-14 in my red bus wit hthe 444E.. it is a shortie bus though
cadillackid is offline   Reply With Quote
Old 10-08-2023, 01:19 AM   #10
New Member
 
Join Date: Nov 2020
Posts: 2
N190 Rear differential

I have the N190 differential 5.63 that I removed from my bus when I changed the transmission over to straight drive
Ole Timer 2 is offline   Reply With Quote
Old 10-11-2023, 11:28 AM   #11
Bus Nut
 
nikitis's Avatar
 
Join Date: Jun 2023
Location: South Carolina
Posts: 361
Year: 1995
Coachwork: Thomas
Chassis: International 3800
Engine: T444E
Rated Cap: 29
Quote:
Originally Posted by cadillackid View Post
I get 11-14 in my red bus wit hthe 444E.. it is a shortie bus though

How many windows max do you consider a shortie bus? Is there an official chart showing bus size standards? Or are we all just sort of winging it?



I consider mine the largest short sized bus since it's an 8 window, while most I see are 9+ for regular sized buses.
nikitis is offline   Reply With Quote
Old 10-11-2023, 11:34 AM   #12
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,326
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
Quote:
Originally Posted by nikitis View Post
How many windows max do you consider a shortie bus? Is there an official chart showing bus size standards? Or are we all just sort of winging it?



I consider mine the largest short sized bus since it's an 8 window, while most I see are 9+ for regular sized buses.

I always considered a full bus as "11 windows" which ususally was akin to a 65 passenger (35 foot) conventional.. 11 rows of seats inside..



there are 2 kinds of shortie busses.. van chassis that ive seen go up to 6 windows.. and also full chassis.. which thomas and bluebird (early) made as short as 5 windows.. my red one is a full chassis IH 3800 T444E 6 window (seated as 5 rows) shortie.. I think its around 24 feet in length.. I know it turns sharper than my dodge ram extended cab 1500 pickup..



bluebird made a bunch of 6 window shorties.. the 5 window birds on ful; chassis ive only ever seen as new as the 80s mainly on a chevy platform..



the thomas 5 window shorties i saw as new as the 90s.. the IC BE was their smallest full chassis that came in as a 6 window...


back in the day Superior made a 5 window shorty as well..
cadillackid is offline   Reply With Quote
Old 10-11-2023, 06:25 PM   #13
Skoolie
 
Join Date: May 2023
Location: Canada
Posts: 142
Year: 2001
Coachwork: BlueBird
Chassis: International 3800
Engine: T444E, Allison 2000
Rated Cap: 72
For what it's worth mine is a 12 window bus. I'm 37 feet. Building a 2 foot rear deck. I will be just under 40 feet length when done.
Attached Thumbnails
IMG_20230812_085536.jpg  
Omnibot2000 is offline   Reply With Quote
Old 10-12-2023, 08:24 AM   #14
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,326
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
2 feet on top of ther 37 it already is? thats a **LOT** of tail swing... unless that deck folds up i sure wouldnt want to make any right turns in multi lane roads...
cadillackid is offline   Reply With Quote
Old 10-17-2023, 10:40 PM   #15
Skoolie
 
Join Date: May 2023
Location: Canada
Posts: 142
Year: 2001
Coachwork: BlueBird
Chassis: International 3800
Engine: T444E, Allison 2000
Rated Cap: 72
Welp. Got a diff ordered today. Decided to stick with the 5.63 and just upgrade to 11 22.5 tires.

Purchasing a diff in the states was not economical. Shipping charges were insane and still had to cross the border, duties, exchange, fees and all the other BS.

Found one used diff. in Canada 2 provinces over with the right gear ratio. The N190 is hella hard to find in Canada. My bus being a 2001 had the N190. We are scrapping the exact same bus as mine at work but a 2003 and has a different diff altogether, would not even bolt in to my housing. Almost appears the N190 stopped production in 2002. This leaving little to find for a low gear ratio to work with an OD 2000 transmission. I did consider purchasing a complete diff with bud tires but only one that was reasonable had 6.17 gear ratio. And I still like the old school Dayton's too.

With that said the only other diffs found in a N190 were 5.11 in Quebec and I'm afraid that was to tall of a gear for me and would start lugging the engine.

I thought I found a N175 with axles local but sadly was gone years ago and Maxim Truck forgot about the add online(as per parts counter)

I'm seriously going to consider buying a complete parts bus at this point found in the same 2 years as mine. I did find one but guy is asking $7200 for it. I purchased mine 2 years in December for $3800. Dang inflation
Omnibot2000 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:56 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2023, vBulletin Solutions, Inc.