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Cargostar Loadstar road speeds


Clutchy
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Hi all, I've got the Cargostar on the road and it drives pretty well but...

What top speeds would these run at? This one is a 1976 with a MV446 and 5+2. It gets pretty close to 3000 RPM to get 50mph. I can't imagine these trucks didn't end up on the highway occasionally? It seems to be pretty comfortable at 40mph. I will need to find a different rear axle setup I think. It has lots of power but I hate hearing an engine scream... Anyone know what truck would have higher gear ratio as a donor?

Maybe the diesels were set up to run at a lower RPM?3.thumb.jpg.4eab3fc60d8822d529c71a8d372ee931.jpg

What are your thoughts?

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When i first got my truck on the road I had the same Problem .. But after I serviced the Allison and adjusted the Modulator cable I realized that I had another gear . so now It goes 100km/h. but it feels way faster because its a Cabover lol.

 

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4 hours ago, madmac74 said:

When i first got my truck on the road I had the same Problem .. But after I serviced the Allison and adjusted the Modulator cable I realized that I had another gear . so now It goes 100km/h. but it feels way faster because its a Cabover lol.

 

Yours is a diesel right? Do you know what rpm it runs at when travelling 100k?

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Can't seem to find International's rear axle number anywhere on it.

I did find this plate.

I have no idea why the picture is loading upside down. I tried rotating a copy and when I attached that it was upside down too.

 

 

 

axle tag.jpg

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What you're seeing is pretty normal for a truck like this.  Loaded to 25-30,000 pounds, perhaps with a big box body for wind resistance and it had to turn those rpms to have enough power to run highway speeds.  That engine was designed to run 3500 rpm all day to do this, not like a car engine in your pickup.  There is some discussion of what is seen in a Loadstar in the comments at https://www.facebook.com/groups/internationalharvestertrucks/permalink/10158351674989748

To find the IH axle designation, you need to order a lineset ticket which will give the IH code for that Rockwell axle.  They are $20 each at https://www.superscoutspecialists.com/store/p-406-line-setting-tickets.aspx  but there is a backlog at the Wisconsin Historical Society where they are archived due to the shutdowns so it may take a while.

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On 11/4/2020 at 11:23 AM, Clutchy said:

Yours is a diesel right? Do you know what rpm it runs at when travelling 100k?

I think it was 2600 RPM,, it felt good , not too buzzy, and yes its a Cat 3208 non-turbo,  my Line setting ticket says i have a 7.17 gear ratio .By the way take a good look in your cab for a line setting ticket , i think mine was under the Passenger seat ...

MAC

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On 11/4/2020 at 1:35 PM, Clutchy said:

 

Can't seem to find International's rear axle number anywhere on it.

I did find this plate.

I have no idea why the picture is loading upside down. I tried rotating a copy and when I attached that it was upside down too.

 

 

 

axle tag.jpg

 

643925020_axletag.thumb.jpg.8c3175424b75e7682a781e602d1ca25f - Copy.jpg

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  • 4 weeks later...

You could order from a selection of rear axle ratios-----so you might find the higher ratio gears in any model through those years.

I have a 89 F700 (429 factory propane) with 10.00x20 tires.  Seems like the engine is in the 3,000--3,100 rpm range at 55 mph.  Lots of power-----but limited speed.  It's a 5+2 and I believe the high side ratio is 7.17 (?)-1.

Most of the V8s found their max torque range in the higher rpm range.  

If you need more speed-----you need to find a higher speed ratio-------or possibly go to a larger size tire ??.

 

Great looking truck.

 

 

DD

 

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Nice truck!

I have a couple loadstar 1600s, 74 & 75 models.

One was originally a bread, cracker, etc delivery truck and is migh geared. It would do 70 mph.

I don't know the story of the other but it is 55 mph tops.

No tachometers, just listening to the engine.

Thx-Ace 

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  • 3 weeks later...
  • 2 months later...

The previous owner just found the line setting ticket so here is what I have

MV446 gas engine

T88 5 speed

RA186 2 speed Rear 6.50/8.87

I have a parts manual that says the following ratios were available for the RA186

4.33/5.91   4.87/6.65  5.57/7.6  6.14/8.38  6.50/8.87  7.17/9.77

Any suggestions for upping the road speed? Donor trucks that used the RA186 with a taller gear?

Thanks

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6.50/8.87 was a common ratio on some of the old Ford F-800's I drove years ago. I drove a couple different 1955's used as 5 yard dump trucks and a 63 F-850 used as a tractor for pulling lowboy or a 36' flatbed. They weren't fast, but did a good job in their day.

DWF

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It is starting to look like the RA186 18,500lb axle is an Eaton 17202 series which also has a lot in common with the more modern Eaton  RT402. I'm not sure why it would have a Rockwell Standard id plate. It should help me find a donor third member. There is some mysterious relationship between Rockwell, Eaton, Spicer and Dana.

I'm still trying to determine whether the axle and yoke splines are the same.

 

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