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1976 Loadstar 5-speed question

J

Jack Deere

New User
I'm looking at buying a 1976 Loadstar dump truck powered by 392 tied to a 5-speed but lacks the usual 2-speed rear axle. Is "five alone" enough gears? I think the truck's GVW is 26,000. It will be a farm truck hauling chips, gravel, dirt, manure and whatever.

Thanks,

Jack
 
You should make sure that it is geared so that when you have a heavy load on it and have to start on a hill that you don't have to slip the clutch. If it is a four wheel drive you can only get them that way but if it is two wheel drive you may be able to pick up a 2 speed rear end and change it out.
 
don't know if this helps or not but I have a 1972 C50 with the 366 gas motor. I rarely need the 2-speed. Low gear is enough to get me moving. A full load of gravel starting up hill could be a problem depending on your gearing.
 
The main advantage of the 2 speed axle is somewhat better acceleration.

Using the 2 speed "splits" each of the 5 main gears. This gives 10 (or sometimes just 9) more closely spaced gears. If the 5 + 2 are shifted properly it keeps the engine RPMs close to its power sweet spot in each gear. End result is a somehwat quicker acceleration.

However for a farm truck the straight 5 speed should work fine for you - you'll just be a bit slower getting up to cruising speed.
 
Those old binders without the 2-speed rear ends "usually" are geared lower.

They feel like you are driving a 2-speed with the button in low all the time.

Sooooo, ya never really ever "get up to cruising speed".

The truck he's talking about will probably max out at about 45-47 mph with the engine just absolutely screaming. :>)

On the other hand, if the truck did happen to be ordered new with a shallow ratio rear end for hiway use, it will not pull out of it's own shadow for use on a farm.

Allan
 
I have a '76 IH 1700 with 404 engine , 5 spd with 2 sod rear end. A lot will depend upond the gearing, the size loads you'll be hauling and your terrain. The trany in mine is what's referred to as a "slit 5", and 5th gear with the 2 spd in "low" is slower geared than 4th in "Hi"., so when you shift & are using the 2 spd the progression is 4th "low", 5th "low", 4th "Hi" and then 5th "Hi". 1,2,& 3, shift just like a regular tranny with 2spd.

If the truck you're looking at has the same shift pattern as mine then you might have a pretty big gap between 4th & 5th if hauling big loads in hilly terrain. My truck has a 15' grain bed with 52" sides & will hold over 425 bu of corn loaded, and with good tw can get close to 450 on it. I'm on pretty level ground most of the time so usually don't use 5th "Low" but we do have one elevator we haul to that there is a grade on the road to it. If I start out from the intersection closest to the hill I have to use 4th "Hi" but if I start from the intersection farther from the hill, about 1 mile farther away, I don't need to use it. out from will have to use 4th "Hi".
 
(quoted from post at 11:10:15 09/02/10) Is the 5-speed an overdrive unit?
Click to expand...

That's a very good question. I'll find out. If 5th is OD, tell me what you think this implies. My guess is that you'd be especially concerned.


Generally speaking, most of my hauling would be pretty flat, except that in the last half mile before home there is a wicked hill. No matter, this is of little real effect since I'll never make it past second gear on that rural road.
 
soybeanjoe
In our part of the country we called that a "long 4th". The 3-4 gap was a bit larger & 4-5 gap a bit smaller than standard. Put on a lot of miles pulling 45 ft freight boxes with them, but had 478 or 549 gassers spinning them. Pass everything except the gas pump.
Quick & dirty was to tell if 4th direct/ 5th over, or lower 4th/ 5th direct. Whichever gear is with shifter pulled back is direct. Eg: If 4th back/ 5th to right & forward is 4 direct/5 over. If 4 to right & forward/ 5 back it is direct in 5.
HTH
Willie
 
Yes.

Common 5 speed truck trannies even of that era COULD be "spec'ed" as OD units.

5TH = straight through becomes 4TH and an OD gearset in place of 4TH becomes OD 5TH.
 
Willie, everyone around here always referred to them as "split 5s". I guess it's just a territorial thing. On mine 5th is far right & down. Rev is far left & down.

I don't remember the frame length offhand but with the 15' grain bed the rear tires set no more than 6" from the rear of the bed, and has a double frame. Dealer ordered it in to settup with a gravel bed & a tag axle in front of the rear axle. I had an older Loadstar 1600 that was needing quite a bit of work done on it & traded it for the 1700 new. Top end is approx 75 mph.

We don't use the truk much anymore, replaced it with semis. But for several years it was the only grain truck I owned. I hauled a lot of my grain to on farm bins & hired most of the grain hauled out. Truck only has about 54,000 miles on it.
 
Yup, different names for same thing in differeant areas.
Dealer told me that theory was that it could be used with single speed rear. In a hard pull, drop to 4th didn't lose as much road speed. Can't say for sure if it actually worked all that well or not.
Really drew my attention on first run with one. 4 hi to 5 lo red-lined tach in a hurry.
Willie
diesel(&gas) pilot retired
 
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