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Old 08-29-2019, 04:02 PM   #21
Skoolie
 
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From what I have read isn't the 2 speed a 1/3 gear reduction? So a 4.10 would be a 5.46. I'm all about a 2 speed if I can get one in the right ratio either way. Click image for larger version

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Old 08-29-2019, 05:04 PM   #22
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Somewhere along the way in my research I found that my rear end wouldn't support a two speed third member. I was thinking about swapping the whole rear end but realized that I have air ride in the rear and am not sure if leaf spring rear ends bolt up. Apparently I have some more research to do. Current plan is to low-ball someone out of a dumptruck with a 466 and tranny with more gears. I see them pretty reasonably priced from time to time and am willing to bet the price would be comparable to a conversion once said and done.
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Old 08-30-2019, 03:44 PM   #23
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I think dump trucks are going to be high numerical ratios most likely but I could be wrong.
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Old 09-02-2019, 02:05 AM   #24
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How high is the floor in a s1800 bus? Is it strong enough for a hauler floor or would in need considerable reinforcement/replacement to park a car on?
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Old 09-03-2019, 08:32 AM   #25
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If you keep the sides, you might be okay. Eliminate them and you'll need to redo/reinforce it. My thought is the sides of the bus will tie all the floor joists together, take that away and I don't think they'll hold.
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Old 09-05-2019, 01:11 AM   #26
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I didnt get to look at it this weekend, so I'm not even sure how they're really built. What is the floor structure like? How about the body? Is it rectangle tube with a skin?
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Old 09-05-2019, 12:50 PM   #27
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Floor is typically a U channel placed on top of the frame rail with steel sheet flooring attached on top of that. The side panels are then riveted to the floor, attaching the outside edge of the floor to the side.

The u channels are placed every so many inches. So without the side panel tying the floor together, I think parking a vehicle on one of the channels would cause the floor to sink right there. Especially being so far out from the frame rail.
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Old 09-05-2019, 01:36 PM   #28
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Quote:
Originally Posted by Booyah45828 View Post
Floor is typically a U channel placed on top of the frame rail with steel sheet flooring attached on top of that. The side panels are then riveted to the floor, attaching the outside edge of the floor to the side.

The u channels are placed every so many inches. So without the side panel tying the floor together, I think parking a vehicle on one of the channels would cause the floor to sink right there. Especially being so far out from the frame rail.
I believe the floor panels are a continuous "C" piece welded to the next one every few feet. The U channel you mention is part of the sheet flooring.
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Old 09-07-2019, 11:57 PM   #29
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I believe the floor panels are a continuous "C" piece welded to the next one every few feet. The U channel you mention is part of the sheet flooring.
So you mean like a big c on its open face curling down and under the edge ? Having a hard time picturing it. On an awesome note I'm pretty sure my van sold and it looks very probable I'm getting the bus. How do I know what gear carriers will fit my rear housing? I haven't seen it to get the tag numbers yet. I figure its is one of only a couple possibilities that's in it. I found a 4.33 Spicer 21060s I'm thinking may fit. I just don't know enough about the medium and heavy duty truck stuff yet. Anyone know what the tag numbers that denote a two speed are? Half the sellers don't know what they have. Click image for larger version

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Old 09-08-2019, 03:10 PM   #30
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After a little poking around I'm. Fairly confident the rear is a Eaton Spicer j190s. I found a site with a bunch of used pumpkins for 450-650$ with trade in. I spotted a car hauler with low pro 22.5 on it at a rest area today hauling a car home from West Virginia.
255/70/22.5 is 37" and a
11r22.5 is 43.1" diameter.
Here's a calculation on rpm at 65

4.44 with 43.1 tire. 2250 rpm at 65
3.73 with 37 tire 2202 rpm at 65

Sounds about right to me, the question is what is 4th gear ratio for Hill climb rpm ? Anyone know where to find that info or even what the trans likely is?
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Old 09-08-2019, 03:57 PM   #31
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Quote:
Originally Posted by rwd4evr View Post
So you mean like a big c on its open face curling down and under the edge ? Having a hard time picturing it. On an awesome note I'm pretty sure my van sold and it looks very probable I'm getting the bus. How do I know what gear carriers will fit my rear housing? I haven't seen it to get the tag numbers yet. I figure its is one of only a couple possibilities that's in it. I found a 4.33 Spicer 21060s I'm thinking may fit. I just don't know enough about the medium and heavy duty truck stuff yet. Anyone know what the tag numbers that denote a two speed are? Half the sellers don't know what they have. Attachment 37262
The floor panels are 2' wide, each end bends under and connects to the next panel. There is a "V" brace every 8". Here you can see 2 butt connections
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IMG_20190908_164918278.jpg   IMG_20190908_164532262.jpg   IMG_20190908_164549824.jpg  
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Old 09-08-2019, 04:18 PM   #32
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Quote:
Originally Posted by rwd4evr View Post
After a little poking around I'm. Fairly confident the rear is a Eaton Spicer j190s. I found a site with a bunch of used pumpkins for 450-650$ with trade in. I spotted a car hauler with low pro 22.5 on it at a rest area today hauling a car home from West Virginia.
255/70/22.5 is 37" and a
11r22.5 is 43.1" diameter.
Here's a calculation on rpm at 65

4.44 with 43.1 tire. 2250 rpm at 65
3.73 with 37 tire 2202 rpm at 65

Sounds about right to me, the question is what is 4th gear ratio for Hill climb rpm ? Anyone know where to find that info or even what the trans likely is?

Most school bus automatics will have a 1:1 4th gear. On the AT545 and MT645(?? Whatever model it is?) this is high gear. My 5 speed manual has a 1:1 top gear. Overdrive transmissions likely have at .75:1 5th gear and .65:1 6th gear (usually locked out electronically, good luck getting it open).


Assuming the 1:1 high gear, looks like your calculations are pretty close. Mine has 10R22.5 tires, a 5.38 rear-gear and 1:1 trans top gear, gives me 55 @ ~2600 RPM (probably electronically limited too). My calculations give me ~65 MPH with 4.44 gears and ~70 with 4.10 gears, I may even go to a 3.91 gear for lower RPM on the freeway (my bus is a shorty and I don't plan on much mountain travel).
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Old 09-08-2019, 04:21 PM   #33
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Ok gotcha. Thanks. So my car is 55 in track width, inside of tires would only be like 7" off the frame. Probably have ramp up on the wheel wells so it would be reinforced anyway.
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Old 09-08-2019, 08:50 PM   #34
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Bus floors have been designed differently over the years, manufacturer to manufacturer will be different, even state to state rules can change the floor design.

His being an 1988 international. I doubt it will have the same flooring design as yours does marc.

What I referenced came from what is on a 1989 international s1853. Even my 1984 s1753 has a different floor design by having a c channel placed every couple feet in place of the U channel. The 89 doesn't have that c channel.

I don't have any pictures of it. I'd recommend a person view it themselves and go from there.
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Old 09-08-2019, 09:53 PM   #35
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Quote:
Originally Posted by Booyah45828 View Post
Bus floors have been designed differently over the years, manufacturer to manufacturer will be different, even state to state rules can change the floor design.

His being an 1988 international. I doubt it will have the same flooring design as yours does marc.

What I referenced came from what is on a 1989 international s1853. Even my 1984 s1753 has a different floor design by having a c channel placed every couple feet in place of the U channel. The 89 doesn't have that c channel.

I don't have any pictures of it. I'd recommend a person view it themselves and go from there.
I can understand changes between manufacturers, but mines an International also and I wouldn't have thought they change floor patterns. It was when I discovered those floors when I discovered the hat channels do not reach the floor. They are held off the floor and attached with "L" brackets.
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Old 09-08-2019, 10:47 PM   #36
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I can understand changes between manufacturers, but mines an International also and I wouldn't have thought they change floor patterns. It was when I discovered those floors when I discovered the hat channels do not reach the floor. They are held off the floor and attached with "L" brackets.
Well I'd guess it depends on the body manufacturer, wolfington or Blu bird or whatever. International just built the chassis and drive train right?
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Old 09-09-2019, 07:21 AM   #37
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Well I'd guess it depends on the body manufacturer, wolfington or Blu bird or whatever. International just built the chassis and drive train right?
Correct. Both of my examples are bluebird bodies on an international chassis.

Thomas, Amtran, Ward, and Wayne all made busses on international s-series chassis and all might have a different floor structure design.
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Old 09-10-2019, 03:29 PM   #38
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Just found out mine is a Wayne body if that tells anyone anything. I'm curious what trans this has. All I know is 5 speed manual at this point. I forgot to ask the international place I talked to. 1079.00 for a set of 5.38 gears new[emoji15].
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Old 09-10-2019, 07:17 PM   #39
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Well I'd guess it depends on the body manufacturer, wolfington or Blu bird or whatever. International just built the chassis and drive train right?
Join the club, go to the userCP and fill out your profile so we know what bus you have and your location to better serve you.
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Old 09-10-2019, 08:44 PM   #40
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Quote:
Originally Posted by rwd4evr View Post
Just found out mine is a Wayne body if that tells anyone anything. I'm curious what trans this has. All I know is 5 speed manual at this point. I forgot to ask the international place I talked to. 1079.00 for a set of 5.38 gears new[emoji15].

I'll sell ya my set of 5.38 gears for half that. N175 (I think) axle, something like that.



I need something numerically lower for a higher top speed. I'm thinking 3.91 should give me ~75 MPH @ 2600 RPM


Most of these 5 speeds will have a 1:1 top gear. Mine has a first gear/rear gear combo so low that I rarely even use 1st gear. That is likely to change with a regeared rear end.
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