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In Low range you are nearly doubling the torque being applied to just the rear drive shaft and and rear axles shafts.
If the traction is good this much torque could damage those components.
When the hubs are locked you're spreading the torque over 2 drive shafts and 4 axle shafts, which makes the torque on the rear drive shaft and rear axle shafts about the same as driving normally in high range 2wd.
If the traction is good this much torque could damage those components.
When the hubs are locked you're spreading the torque over 2 drive shafts and 4 axle shafts, which makes the torque on the rear drive shaft and rear axle shafts about the same as driving normally in high range 2wd.
A couple of days ago I loaded up the trailer.... lets just say the fuso was hopping around from the load. I wasnt going anywhere fast so I decide to lock the hubs and cruise to the dump in low range. I got to the dump and the scale told me I was pulling 25000 lbs. You should of seen the looks I got from the workers there when I started heading of the scale. Anyway I have made a personal vow to never load up the truck that much. 2 runs to the dump is better than a run to the dealer.
After that I experimented with the 2wd low range for a couple of meters than I decided to get more info before I started using it.
Thx for the information!
four wheel low without locking hubs ??
hello all
yes, using common sence and not doing things like dumping the clutch it is fine to use low range without locking the hubs.
i just bought our new 08 and this is from the factory rep, we sometimes haul abit of hay over a pretty steep road and that was a concern for us before we bought our truck being able to use the low range if needed without locking the hubs on pavement.
now i don't recommend this to others because it is over the official fuso rating, but like you we have hauled two heavy loads so far now one 18500 lbs and the other 21600lbs (not using low range, the total weight including truck) and we are very pleased with the trucks abilities and torque even with these weights.
our understanding from the factory guys is these trucks are under rated and built tough. at this point we have every reason to beleive this. i'm amased at the torque and pull even at 6% grades. we were concerned with the rated 155 hp but not now. we can pull a 6% + grade unloaded cruising at 55 no problem as well as accelarate from 40 to 60 on the same grade.
sorry for getting carried away, we are extremely happy with our truck so far
i will get some pic's loaded under a new tread one of these days i hope
cheers lehel and laura
hello all
yes, using common sence and not doing things like dumping the clutch it is fine to use low range without locking the hubs.
i just bought our new 08 and this is from the factory rep, we sometimes haul abit of hay over a pretty steep road and that was a concern for us before we bought our truck being able to use the low range if needed without locking the hubs on pavement.
now i don't recommend this to others because it is over the official fuso rating, but like you we have hauled two heavy loads so far now one 18500 lbs and the other 21600lbs (not using low range, the total weight including truck) and we are very pleased with the trucks abilities and torque even with these weights.
our understanding from the factory guys is these trucks are under rated and built tough. at this point we have every reason to beleive this. i'm amased at the torque and pull even at 6% grades. we were concerned with the rated 155 hp but not now. we can pull a 6% + grade unloaded cruising at 55 no problem as well as accelarate from 40 to 60 on the same grade.
sorry for getting carried away, we are extremely happy with our truck so far
i will get some pic's loaded under a new tread one of these days i hope
cheers lehel and laura
Pskhaat
2005 Expedition Trophy Champion
I guess I'm confused as to the driveline concern. Take speed out of the equation you will need some quantity of torque to move the vehicle, if that means a lower gear then fine but you would only be applying unneeded torque in the case of not having any forward movement and overloading the drivetrain and/or inducing an moment delta (change/acceleration) in the drivetrain above capacity.
I guess I'm failing to see the problem here?
I guess I'm failing to see the problem here?
locking hubs ??
hello tree
we got a long wheel base.
yes, a 6 speed would be great. with the extra low 1st thru 3rd gears the fuso has we think our plan of going to singles all around with increased tire size will work out good.
we are having 19.5 rims (with singles in the rear) made by stockton wheel and will run the yokohama ty 303 285/70 19.5 tires. there about 35.4 tall and 11 wide with a rating of 6395 per tire. this is more than the dually tires rsting on the truck now. pioneer truck in sacramento where we bought the truck will be doing some suspension work and this should raise the truck about 1 1/2 to 2 inches.
we beleive the gear ratio should work out very well with a highway cruising speed closer to 70 than the 55-60 we have now. and still enough power within the first 3 gears to get us over those hills at a reasonable speed.
running at 60 + we see only about 12-13 mpg, at 55 we get close to 15 mpg unloaded. we hope we'll see the 15 mpg with the new wheels and tires at a higher speed and not have to run so close to redline to do 60.
well, another long winding
cheers lehel and laura
hello tree
we got a long wheel base.
yes, a 6 speed would be great. with the extra low 1st thru 3rd gears the fuso has we think our plan of going to singles all around with increased tire size will work out good.
we are having 19.5 rims (with singles in the rear) made by stockton wheel and will run the yokohama ty 303 285/70 19.5 tires. there about 35.4 tall and 11 wide with a rating of 6395 per tire. this is more than the dually tires rsting on the truck now. pioneer truck in sacramento where we bought the truck will be doing some suspension work and this should raise the truck about 1 1/2 to 2 inches.
we beleive the gear ratio should work out very well with a highway cruising speed closer to 70 than the 55-60 we have now. and still enough power within the first 3 gears to get us over those hills at a reasonable speed.
running at 60 + we see only about 12-13 mpg, at 55 we get close to 15 mpg unloaded. we hope we'll see the 15 mpg with the new wheels and tires at a higher speed and not have to run so close to redline to do 60.
well, another long winding
cheers lehel and laura
whatcharterboat
Supporting Sponsor, Overland Certified OC0018
Yep. Especially if your heavily loaded. If you had to turn tightly on bitumen with all the extra traction from the weight pushing down .........Sure going straight up the boat ramp would be nothing.
Have never heard of anyone having trouble using LOW/4 with the hubs unlocked anyway.
Mickldo
Adventurer
Yep nothing wrong with using low range with the hubs unlocked. I use it all the time launching big boats on steep boat ramps. Not only for the lower gearing to climb the ramp easier but also for reversing the boat down the ramp, it slows everything down making it easier to correct the steering in time. The reason I leave the hubs unlocked is so I don't get any transmission wind up. Even a simple straight back down a ramp can cause the axles to wind up too much.
Providing you don't go getting excessive wheelspin, dump the clutch or over rev the motor you will be fine with the hubs unlocked. But lets face it if you are getting wheelspin you would be locking in the hubs any way.
Providing you don't go getting excessive wheelspin, dump the clutch or over rev the motor you will be fine with the hubs unlocked. But lets face it if you are getting wheelspin you would be locking in the hubs any way.