TRUE 4wd and difflock, questions need-a answerin

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edbell2005

Guest
afternoon everyone,
I was watchin a lil vid on youtube, about 4x4 drivin techniques and th like.Th fella in't video said a couple things which I dint know was true.
Any ideas on't followin?
Is TRUE 4WD only th case if ya difflock is on?is permanent 4wd not TRUE 4WD?
and also he said that lockin ya diff and rattlin along at 40mph on sandy roads (it was a vid in SAfrica) or where grip is poor, is fine as th damage to ya transmission (i'm guessin he means this wind up thing that I hear bout but dont really understand!) anyway, th damage to ur transmission is minimul and far outweighed by th safety of lockin ya dif and havin TRUE 4WD.I'l try and dig out th video, the old codger is a reet laugh!

anyways any help would b grand!!
 
Do a search on here mate. There are loads of threads on the subject. It is true to say that truly locked no differential equal drive to all four wheels is no use to anyone except on very slippery or loose surfaces because the wind up will destroy the transmission.
 
edbell2005 said:
(i'm guessin he means this wind up thing that I hear bout but dont really understand!) quote]



Axle wind-up begins to occur when you select 4wd and start to corner. The reason is that when 4wd is engaged, you are driving front and rear axles at the same speed all the time - when you corner the front and rear must be driven at different speeds as they take a different track. This causes tension built up within the whole of the drive train and if then, tension is not released it keeps on building up until something gives. Usually something small, delicate and very expensive!!
When traveling on an unsealed road such as a murram, graveled or laterite surface you have at least a 50% reduction in grip between the tyres and the road. Therefore, the axle windup that occurs is released through the wheels.
On a sealed road such as tarmac or concrete the tyres adhere themselves to the surface to a degree and the windup is extremely difficult to release. You will feel symptoms such as very hard steering, the feeling that the vehicle is jumping up and down and find it hard to change gear. If you do experience any of the above then you must stop immediately and try to release the windup and ensure that the vehicle is back in 2wd or the centre differential is unlocked. To release the windup in this situation you only have to jack up one wheel. But beware; the wheel will spin around quite fast as the tension is released.


do that help yer?
Click to expand...
 
slob said:
edbell2005 said:
(i'm guessin he means this wind up thing that I hear bout but dont really understand!) quote]



Axle wind-up begins to occur when you select 4wd and start to corner. The reason is that when 4wd is engaged, you are driving front and rear axles at the same speed all the time - when you corner the front and rear must be driven at different speeds as they take a different track. This causes tension built up within the whole of the drive train and if then, tension is not released it keeps on building up until something gives. Usually something small, delicate and very expensive!!
When traveling on an unsealed road such as a murram, graveled or laterite surface you have at least a 50% reduction in grip between the tyres and the road. Therefore, the axle windup that occurs is released through the wheels.
On a sealed road such as tarmac or concrete the tyres adhere themselves to the surface to a degree and the windup is extremely difficult to release. You will feel symptoms such as very hard steering, the feeling that the vehicle is jumping up and down and find it hard to change gear. If you do experience any of the above then you must stop immediately and try to release the windup and ensure that the vehicle is back in 2wd or the centre differential is unlocked. To release the windup in this situation you only have to jack up one wheel. But beware; the wheel will spin around quite fast as the tension is released.


do that help yer?
Click to expand...

that was crackin slob!real plain simple english, twas a pleasure to read!so does it matter which wheel ya jack?
Click to expand...
 
dint matter as the wind up is constant throu the whole drive train.
think of it as a spring under tension, it dunt matter which end you release the tension will still be eased
 
slob said:
edbell2005 said:
(i'm guessin he means this wind up thing that I hear bout but dont really understand!) quote]



Axle wind-up begins to occur when you select 4wd and start to corner. The reason is that when 4wd is engaged, you are driving front and rear axles at the same speed all the time - when you corner the front and rear must be driven at different speeds as they take a different track. This causes tension built up within the whole of the drive train and if then, tension is not released it keeps on building up until something gives. Usually something small, delicate and very expensive!!
When traveling on an unsealed road such as a murram, graveled or laterite surface you have at least a 50% reduction in grip between the tyres and the road. Therefore, the axle windup that occurs is released through the wheels.
On a sealed road such as tarmac or concrete the tyres adhere themselves to the surface to a degree and the windup is extremely difficult to release. You will feel symptoms such as very hard steering, the feeling that the vehicle is jumping up and down and find it hard to change gear. If you do experience any of the above then you must stop immediately and try to release the windup and ensure that the vehicle is back in 2wd or the centre differential is unlocked. To release the windup in this situation you only have to jack up one wheel. But beware; the wheel will spin around quite fast as the tension is released.


do that help yer?
Click to expand...

I'd been wondering that myself! Do you have to be in gear when you jack the wheel up to release the tension or not?
Click to expand...
 
also do ya hav to have th engine started, in any gear, difflock on/off etc?
 
a'rite fella wunt bein sarky!

plus accidents sometimes 'appen

well they do for me!
 
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