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Old 08-27-2019, 11:49 PM   #1
Mini-Skoolie
 
Join Date: Aug 2019
Posts: 24
1988 S1853 gearing and probably other stuff

I'm looking at trading my grumman 6.2 nv4500 Frito lay truck for a 88 s1853 bus. It's a 40' . Dt360 and 5 speed. He says he doesn't know the gear ratio and can't see the tag. Does the vin tell me anything? It's 2 hours away and I haven't layed eyes on it yet. Are these 5 speeds overdrive?
The vin is 1HVLPCFP5JH589851.
GVWR is 26,500, does anyone know the curb weight? My plan is to remove a good portion of the rear body and ramp it to carry my drift car or any other car I may be going to pick up so I'm curious on weight it actually is rated for carring not just the GVWR. I figure 72 passenger has to be at least 72 x 125# right?.
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Old 08-28-2019, 06:44 AM   #2
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 11,872
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
you can call navistar dealer with a VIN and ask for some "part" I need a 'rear gear' and they will give you a massively high price.. and you can ask "hey by the way whats the gear ratio? whats the trans model?" and they will tell you..



i am a huge fan of the DT360. esp when its paired to a locking transmission like an MT643 auto or a stick shift. thats likely a 5 speed spicer which is a good solid trans..



obviously make sure no one has trashed the clutch..


check the engine to make sure its solid.. no fuel or water in the oil ...


these are fully mechanical engines and can be rebuilt in-frame if you wear it out, there are things you cna do to turn up the A-pump and get youreself some more power.. a DT360 can be P-pumped if you want to make Real power..



im guessing since you mention a drift-car that you are mechanically inclined.. its a great platfoirm in my opinion to work on.



the DTA360 will rev to 2800 RPM but it runs most comfortably around 2300-2500 RPM..



-Christopher
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Old 08-28-2019, 07:55 AM   #3
Bus Crazy
 
Join Date: May 2014
Location: West Ohio
Posts: 1,170
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
Your local IH dealer should be able to tell you the factory gear ratio in the manner that Chris suggested.

You can also check on the inside of the hood on the right side by the radiator. Sometimes they would tape the factory line ticket right there(mine is). You can read through that and see what it is.

Your 5 speed is likely a direct drive unit.

Curb weight for a 40 footer with seats removed will likely be around 17k lbs.

A lot of racers have done what you're planning on doing so I see no problem with it. Try and place the vehicle's engine over the rear wheels of the bus for better handling. The only problem I've noticed is that the ramp angle is usually pretty steep because of how high the bus is off the ground. That might create problems loading/unloading with low ground clearance vehicles.
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Old 08-28-2019, 11:13 AM   #4
Skoolie
 
Join Date: Jan 2016
Location: Foot of the siskiyou mountains Oregon.
Posts: 129
Year: 1989
Coachwork: Thomas / international
Chassis: International
Engine: Dt 360/ spicer 5 speed
Rated Cap: 42
I have this same drivetrain in my '89 Thomas 28' dognose. The dt360 is awesome and super reliable as is the 5 speed. The tranny is 5th direct(no od). The gap between 3 and 4 is huge and I have to wrap it out in order to get it to pull In 4th. Certainly not a semi truck with a 10 speed. Also, though the engine can be turned up, I have refrained because the engine is already producing just under the torque rating for the tranny. Also, my bus weighs about 15k lbs. Though yours would likelly be lighter after you strip it down to make it a car hauler, your gvwr is the total allowed weight of the bus's and all it's cargo..so I assume you could tow a vehicle it the 10-12k range. This combo is no speed queen but is super reliable and probly more favorable than many of the power train combos out there short of getting a bigger engine.on the other hand, the Chevy 6.2 is one of my least favorite diesels of all time as I have had them fail under ridiculous circumstances. I say go for it
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Old 08-28-2019, 05:06 PM   #5
Mini-Skoolie
 
Join Date: Aug 2019
Posts: 24
Awesome ! Thanks for all that everyone. I'll call a dealer.
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Old 08-28-2019, 05:20 PM   #6
Mini-Skoolie
 
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Oops. .... .
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Old 08-28-2019, 05:22 PM   #7
Mini-Skoolie
 
Join Date: Aug 2019
Posts: 24
Quote:
Originally Posted by rwd4evr View Post
I'm looking at trading my grumman 6.2 nv4500 Frito lay truck for a 88 s1853 bus. It's a 40' . Dt360 and 5 speed. He says he doesn't know the gear ratio and can't see the tag. Does the vin tell me anything? It's 2 hours away and I haven't layed eyes on it yet. Are these 5 speeds overdrive?
The vin is 1HVLPCFP5JH589851.
GVWR is 26,500, does anyone know the curb weight? My plan is to remove a good portion of the rear body and ramp it to carry my drift car or any other car I may be going to pick up so I'm curious on weight it actually is rated for carring not just the GVWR. I figure 72 passenger has to be at least 72 x 125# right?.
Yes I'm very mechanically inclined. I'm a hot roddder and been around race cars forever. I do equipment repair for a museum and work on some heavy machines. I do all my own work and design/fabrication on my 1978 Mercedes 450slc drift car, I sell vintage Mercedes parts as a part of my income. I've got some diesel experience with Mercedes stuff and I know all the theory just haven't put my hands on too many big trucks. It's only got 186,000 on it so I would guess it should have plenty of life left in it as is. We'll see if I get it.
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Old 08-28-2019, 05:30 PM   #8
Mini-Skoolie
 
Join Date: Aug 2019
Posts: 24
Quote:
Originally Posted by Booyah45828 View Post
Your local IH dealer should be able to tell you the factory gear ratio in the manner that Chris suggested.



You can also check on the inside of the hood on the right side by the radiator. Sometimes they would tape the factory line ticket right there(mine is). You can read through that and see what it is.



Your 5 speed is likely a direct drive unit.



Curb weight for a 40 footer with seats removed will likely be around 17k lbs.



A lot of racers have done what you're planning on doing so I see no problem with it. Try and place the vehicle's engine over the rear wheels of the bus for better handling. The only problem I've noticed is that the ramp angle is usually pretty steep because of how high the bus is off the ground. That might create problems loading/unloading with low ground clearance vehicles.
I've seen a couple with Jeep's or similar on the back. I was thinking if Dove tailing it behind the springs, or maybe a 4 link and air bags in the rear. The thought of a hinged Dove tail crossed my mind, I know the tail needs to be fairly high to keep it off the ground in a steep-ish entry way type situation. Im sure I can come up with something to make it work. My drift car is fairly low but there's always Jacking it up and putting blocks in for loading. I drive all over the place to pick up parts cars to part out so it would be used for that also.
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Old 08-28-2019, 05:36 PM   #9
Mini-Skoolie
 
Join Date: Aug 2019
Posts: 24
Quote:
Originally Posted by SolomonEagle View Post
I have this same drivetrain in my '89 Thomas 28' dognose. The dt360 is awesome and super reliable as is the 5 speed. The tranny is 5th direct(no od). The gap between 3 and 4 is huge and I have to wrap it out in order to get it to pull In 4th. Certainly not a semi truck with a 10 speed. Also, though the engine can be turned up, I have refrained because the engine is already producing just under the torque rating for the tranny. Also, my bus weighs about 15k lbs. Though yours would likelly be lighter after you strip it down to make it a car hauler, your gvwr is the total allowed weight of the bus's and all it's cargo..so I assume you could tow a vehicle it the 10-12k range. This combo is no speed queen but is super reliable and probly more favorable than many of the power train combos out there short of getting a bigger engine.on the other hand, the Chevy 6.2 is one of my least favorite diesels of all time as I have had them fail under ridiculous circumstances. I say go for it
What is the rear ratio in yours? Im guessing you have the 11r22.5 tire right? So 2300-2400 rpm is what speed?
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Old 08-28-2019, 05:55 PM   #10
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 11,872
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
my bus has 11R22.5 tires and a 4.78 rear.. at 2300 RPM im running about 57.. I typically drive it 62 which is right about 2500 RPM..



you'll find the Bosch A pump to be similar to what you are used to with VW or merc mechanicals.. its pretty standard stuff. people can and do P-pump the DTA360.. MW pumps were on some of them.. but not as common as the A-pump.
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