4WD problemette...

[lacroupade]

....right, no barrack room mechanics please, need someone who knows their way around the diff/front drive

When I engage 4WD on my fixed-hub Mk IV I get a kind of low frequency whining and mild vibration, and the truck seems to want to wander slightly off to the right.

There are no symptoms in 2WD and apart from the noise, 4WD does function normally otherwise.

At the moment I suspect the CV joint - wheel bearing would be noisy in 2WD and it isn't - but is there anything else in the drive chain up front that might be the cause?

And if it is CV, how costly are the bits does anyone know?

Cheers m'dears....

[kbekl]

could be half shaft bearing ??

outer cv joint from milners is £70

[lacroupade]

Originally Posted by kbekl

could be half shaft bearing ??

outer cv joint from milners is £70

oh well that could be worse I spose, plus an hour or two of labour.....

not sure about the half shaft bearing though as I'd suspect, since its permanently rotating, it should be noisy all the time....while the CV joint isn't under any real strain until its got drive through it is it?

where are all the spanner w*nkers when you need 'em?!

[kbekl]

Originally Posted by lacroupade

oh well that could be worse I spose, plus an hour or two of labour.....

not sure about the half shaft bearing though as I'd suspect, since its permanently rotating, it should be noisy all the time....while the CV joint isn't under any real strain until its got drive through it is it?

where are all the spanner w*nkers when you need 'em?!

i thought the half shaft bearing only spins in 4wd

[makeitfit]

Originally Posted by lacroupade

where are all the spanner w*nkers when you need 'em?!

Too new for me mate, mine still has levers to heave and a clutch
My advise in this area is to turn up the sounds a bit more

[lacroupade]

Originally Posted by makeitfit

Too new for me mate, mine still has levers to heave and a clutch
My advise in this area is to turn up the sounds a bit more

No this is on the manual truck, not the automatic.....I'm just not clear what bit is freewheeling from what with fixed hubs, my assumption has always been that 4WD selection therefore takes place in the diff, but I have been wrong once before (I think...)

[tezzer]

could be the transfer box, as you have fixed hubs the diff and propsharft will be turning, you get 4 wheel drive by transfer box,

[kbekl]

could be the prop where it enters the diff ??

so if it's fixed hubs then it aint cv joint either as that will be in use all the time as well

it could be the bearings with the extra strain on it when in 4wd

[lacroupade]

Originally Posted by kbekl

could be the prop where it enters the diff ??

so if it's fixed hubs then it aint cv joint either as that will be in use all the time as well

it could be the bearings with the extra strain on it when in 4wd

good points Karl, but the noise defo seems to emanate from the front left wheel which would tends to discount prop shaft, but the CV joint remains a favourite since its just freewheeling under no load in 2WD, its only in 4WD it takes the strain....i'd also expect a wheel bearing to be noisy all the time, especially having driven 4000 miles in the last three weeks with no change in 2WD noise levels....

Keep 'em coming!

[solarman216]

I have auto hubs, and from my reading of posts relating to manual hubs if you want 4 wheel drive you not only need to shift the lever in the cab but get out and turn each hub on, can someone confirm, Rick

[kbekl]

isnt the diff off set to the left (or is it right)so that it would sound like it is coming from the left or could be echoing across

or you have better hearing in your left ear lol

[kbekl]

Originally Posted by solarman216

I have auto hubs, and from my reading of posts relating to manual hubs if you want 4 wheel drive you not only need to shift the lever in the cab but get out and turn each hub on, can someone confirm, Rick

yes you have to get out and manually turn it on

[geoffdown]

Originally Posted by solarman216

I have auto hubs, and from my reading of posts relating to manual hubs if you want 4 wheel drive you not only need to shift the lever in the cab but get out and turn each hub on, can someone confirm, Rick

yes you do for manual but he has fixed hubs

[solarman216]

Originally Posted by lacroupade

good points Karl, but the noise defo seems to emanate from the front left wheel which would tends to discount prop shaft, but the CV joint remains a favourite since its just freewheeling under no load in 2WD, its only in 4WD it takes the strain....i'd also expect a wheel bearing to be noisy all the time, especially having driven 4000 miles in the last three weeks with no change in 2WD noise levels....

Keep 'em coming!

AS long as you are turning the hubs off then CV joint and shaft are not turning, unless you select 4 wheel drive with the lever but with the hubs not "on" there will not be any drive to the front, although the prop shaft, diff, and drive shafts including the CV's will be turning, assuming the lever is in 2 wheel then it is all dead, unless on a cold morning the oil is thick enough to drag the shafts into turning, so if you have a noise from NSF in 2 wheel then wheel bearing, or brake related noise, only other point is the locking hub, if there is a loose/fractured/broken part inside that means it is not fully disengageing, so time to put the hub apart I think, Rick

[makeitfit]

I think the Luvgluv has one of those newer trucks with locked hubs and selected 4wd from the transfer box. So manuals to engage or autos to fiddle with. I think