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05-23-2018, 10:04 AM
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#1
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Bus Crazy
Join Date: May 2018
Location: topeka kansas
Posts: 1,769
Year: 1954
Coachwork: wayne
Chassis: old f500- new 2005 f-450
Engine: cummins 12 valve
Rated Cap: 20? five rows of 4?
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Manual transmission
It seems the manual transmission is a rare thing in this skoolie world.I think I am going to end up with a NV5600 in my short bus. Is any body running a 6speed with cummins 12valve ? Am I the last person on earth to drive manual transmissions? __ I feel so alone!
cheers, william
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05-23-2018, 10:22 AM
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#2
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Bus Nut
Join Date: Apr 2018
Location: League City, TX
Posts: 321
Year: 1994
Coachwork: Thomas
Chassis: International 3800
Engine: DT408 6.7L L6
Rated Cap: 14
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The bus I'm bidding on has a 12v mated to a manual as well. I'll know in a week if I get it.
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05-23-2018, 10:27 AM
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#3
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Bus Geek
Join Date: May 2016
Location: Eastern WA
Posts: 6,401
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
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We do see a few buses with manual transmissions but, yes they are somewhat rare.
I asked the transportation manager why they had fallen out of favor. His response was "workers compensation claims". Apparently repetitive motion injuries are a problem with city bus route drivers with manual transmissions.
Most of the 5/6 speed manuals that you will see in school buses will be Fuller or Spicer. In more recent buses the Fuller is the most common.
I have NV5600s in Dodge pickups. I love them in a pickup but would be reluctant to put one in anything but a very short bus.
I have seen a scattering of 6 speed buses for sale here: North Carolina School Bus Surplus System
From what I recall of the ones I checked on, they had around a 6:1 rear gear. That would need to be addressed.
Good luck.
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05-23-2018, 10:51 AM
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#4
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Bus Crazy
Join Date: May 2018
Location: topeka kansas
Posts: 1,769
Year: 1954
Coachwork: wayne
Chassis: old f500- new 2005 f-450
Engine: cummins 12 valve
Rated Cap: 20? five rows of 4?
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my plan
The bus I have, but have not seen.... yet. 54 ford. 24' long. expected weight with out people is 12,000 lbs. 245 70-19.5 tires, 3.73 rear gears. 12 valve cummins with about 300 to 350 hp estimated torque 600 ft lbs. andthe NV5600 transmission. I have a f450 chassis to under the bus, that will give me newer parts to source if I have a problem on the road. I dont want to attempt to find parts for a 54 ford while traveling...
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05-23-2018, 11:13 AM
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#5
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Bus Geek
Join Date: May 2016
Location: Eastern WA
Posts: 6,401
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
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Sounds like an ambitious plan!
I look forward to watching your build.
I suspect that at 12k you may be in the realm of reality with the NV5600. In a 26k bus I would not have high hopes for longevity.
Keep us updated on your project.
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05-23-2018, 02:11 PM
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#6
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Bus Nut
Join Date: Jan 2015
Location: ...little north of Toronto Ontario
Posts: 606
Year: 2000
Coachwork: Thomsass
Chassis: FreightShaker
Engine: 5.9 Cummins 5 speed
Rated Cap: 2 ATV's and friends
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Quote:
Originally Posted by magnakansas
It seems the manual transmission is a rare thing in this skoolie world.I think I am going to end up with a NV5600 in my short bus. Is any body running a 6speed with cummins 12valve ? Am I the last person on earth to drive manual transmissions? __ I feel so alone!
cheers, william
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I've got one...
40 footer, 5.9 Cummins, 5 Speed Fuller, 120kms top speed...love it, like drivin' a truck.
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05-23-2018, 04:28 PM
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#7
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Bus Crazy
Join Date: May 2018
Location: topeka kansas
Posts: 1,769
Year: 1954
Coachwork: wayne
Chassis: old f500- new 2005 f-450
Engine: cummins 12 valve
Rated Cap: 20? five rows of 4?
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rpm at 65mph
If I have calculated correctly I will be turning just under 1900 rpm in 6th gear and around 2500 rpm in 5th at 65mph. What are you guys turning at cruise speed, and what is your cruise speed. 5th is 1:1 and 6th about .73 over drive for my intended transmission. If I break it, I am going to use a fuller with over drive, probably the 7 speed. That would be the closest match to the NV and only weighs about 175 lbs pound more.
thanks to all that have answered.
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05-23-2018, 05:45 PM
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#8
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Bus Geek
Join Date: Sep 2017
Location: Owasso, OK
Posts: 2,627
Year: 1999
Coachwork: Thomas
Chassis: Saf-T-Liner MVP ER
Engine: Cummins 6CTA8.3 Mechanical MD3060
Rated Cap: 46 Coach Seats, 40 foot
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Quote:
Originally Posted by magnakansas
If I have calculated correctly I will be turning just under 1900 rpm in 6th gear and around 2500 rpm in 5th at 65mph. What are you guys turning at cruise speed, and what is your cruise speed. 5th is 1:1 and 6th about .73 over drive for my intended transmission. If I break it, I am going to use a fuller with over drive, probably the 7 speed. That would be the closest match to the NV and only weighs about 175 lbs pound more.
thanks to all that have answered.
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I have a Cummins 8.3. Rev limit is 2200. 4th gear is 1:1, 5th is 0.75:1. 6th, when unlocked, is 0.65:1
Current top speed is around 67 mph in 5th. There are three ways to go faster. One is to stiffen the governor springs because the engine is happy to 3400 rpm. Another way would be to stick a 4.78 (up from 5.3 final drive pinion set in. 3rd way would be to get 6th unlocked.
My preference would be to unlock what I already have. It would be the cheapest option and it would reduce the rpm at, say, 65 mph, for fuel economy while cruising. Next best would be to change the FD, but that is quite expensive.
Cheapest way would be to fix the governor springs and fuel plate, but that would cost fuel ... maybe. Advancing the timing might help with that.
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05-23-2018, 06:47 PM
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#9
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Bus Nut
Join Date: May 2015
Location: Minnesota
Posts: 502
Year: 92
Coachwork: Thomas Built
Chassis: International 3800
Engine: DTA360 5.9L
Rated Cap: 77
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we've got a manual 5 speed spicer, its so damn smooth and nice. i wouldnt drive a big rig without a manual, the thought of it is just insane. having driven semi's fully loaded and having my cdl and gone through a bunch of hill country, i love manuals.
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05-23-2018, 06:52 PM
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#10
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Bus Crazy
Join Date: May 2018
Location: topeka kansas
Posts: 1,769
Year: 1954
Coachwork: wayne
Chassis: old f500- new 2005 f-450
Engine: cummins 12 valve
Rated Cap: 20? five rows of 4?
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i'll take the sixth
My 6th gear should be like your 5th. I don't know if the 5.9 would have enough torque to support more overdrive. I assume you also have more bus to move too. I think I will do well with the 5.9 because of the small size. 24' I will also work on undertray to smooth up under the bus too. Lots of work ahead.
william
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05-23-2018, 09:32 PM
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#11
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Bus Crazy
Join Date: Jun 2016
Location: N.C.
Posts: 1,136
Year: 1997
Coachwork: Bluebird
Engine: DT466E
Rated Cap: 34
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Quote:
Originally Posted by magnakansas
It seems the manual transmission is a rare thing in this skoolie world.
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Maybe not 'rare', but definitely uncommon......took me 18 months of searching to find the 466/Spicer combo I lusted after. Driven a lot of manually-shifted vehicles over the years, from farm equipment to straight trucks, and wanted that same enjoyment in my bus.
Couldn't find one with 3-on-the-tree, though.
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04-08-2019, 12:28 PM
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#12
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Skoolie
Join Date: Oct 2018
Location: Georgia
Posts: 169
Year: 2002
Coachwork: Bluebird
Chassis: Tc2000
Engine: 5.9 24v
Rated Cap: 27
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What are some manual transmissions, Spicer or Fuller, that would bolt up to a 24V cummins 5.9. Currently mated to the 545 and am entertaining ideas of a manual swap in the future.
This website seems to be a good resource.
https://www.vanderhaags.com/Search-R...typesetid=4000
The other hurdle would be some kind of custom linkage since my bus is a flatnose and that puts the transmission about 6 feet behind the driver.
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04-07-2021, 06:14 PM
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#13
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New Member
Join Date: Mar 2021
Posts: 1
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manual transmission dt466 sources?
I have missed out on 2. Still looking.I think a short one is best 4 me.Any leads appreciated.
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04-07-2021, 06:58 PM
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#14
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Traveling
Join Date: Sep 2013
Location: Virginia
Posts: 2,302
Year: None
Coachwork: None
Chassis: None
Engine: None
Rated Cap: None
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Quote:
Originally Posted by magnakansas
It seems the manual transmission is a rare thing in this skoolie world.
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Depends on the bus and vintage. Manuals were quite common until the late 1980s.
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