First time she has ever let me down!

[hellmett]

Re

Tell you what though fellas!

When the Surf starts to slide in the ice it's deffo "brown trouser" time!

Nearly as bad as the first time I drove through a deep puddle and the water hit the windscreen!

[BUSHWHACKER]

Increased wear of the front prop shaft (and possibly increased vibration) as it will always be turning even when the vehicle is in rear, 2 wheel drive.

No difference in 'feel' to the factory set-up when in 2wd.
It just deletes the troublesome vacuum side of the system, but you knew that because you read that in the link didn't you!

To reduce C/V boot wear and driveline drag, it's best to fit free-wheeling hubs too as well as this modification.

[hellmett]

Re

###### THING!

It's still doing the same thing, back wheels spinning in 4WD.

It's deffo not engaging properly.

Is there any foolproof way that I can check if the 4WD is working properly fellas?

Thanks,

Gary

[Sancho]

###### THING!

It's still doing the same thing, back wheels spinning in 4WD.

It's deffo not engaging properly.

Is there any foolproof way that I can check if the 4WD is working properly fellas?

Thanks,

Gary

It's kind of rudimentary but, for starters, have you tried jacking the front up and seeing if you can turn the wheels with 4wd engaged?

[hellmett]

It's kind of rudimentary but, for starters, have you tried jacking the front up and seeing if you can turn the wheels with 4wd engaged?

I guess you need to lift both wheels at the same time and have the engine ticking over in N with the 4WD engaged for it to be effective?

Is this what you mean Sancho?

[dieselboy]

I guess you need to lift both wheels at the same time and have the engine ticking over in N with the 4WD engaged for it to be effective?

Is this what you mean Sancho?

If you engage 4WD, it will remain engaged with the engine off. I would do that rather than leave the engine running.

[hellmett]

Re

UPDATE

So I know that the 4WD isn't engaging!

Right, so I'm on my way to leave the kids to school and I think that I will engage the 4WD (Manual Hubs are not engaged BTW!) so that maybe it will oil up and work it's way loose.

When I pressed the button the light came on the dash but there was no "clunk" etc.

About 1.5 miles down the road I hear this buzzing rubbing grinding noise, I had just fitted new shocks so my first thought was that one of them had came loose and was rubbing against the wheel.

Quickly I pull over and checked it was ok so off I go again and the rubbing etc. noise has now stopped.

Driving along about 30mph I pressed the button to disengage the 4WD and press again to engage and I hear "buzzzzzzzzzzzzzz - thunk" and feel a bump.

Thinking "hello, the 4WD has engaged, happy days!" I keep engaging and disengaging it for a while and letting it drive in 4WD for 10 or so miles.

Everytime I press to engage I hear and feel the "Buzzz - thunk", sometimes just a "thunk", seems to be related to revs/speed.

Is this normal?

It seems that it will not engage while stationary and needs to be moving.

I'm guessing that it was stuck or stiff and has now worked it's way looser??

Could anyone please tell me what is happening?

Does the 4WD system need oiled or greased or something?

I appreciate any advice on this fellas

Cheers!

Gary

[stormforce]

alot of these trucks will need to be moving in order to get into 4wd.Has the front diff oil been changed recently or does it need topping up.I normally have my hubs locked if i know the roads are going to be slippery so then i just press the button and it will go straight into 4wd.On the odd occassion i have had to stop and shunt back and forward a couple of times for it to engage.I think the fastest i have travelled is 40mp and put it into 4wd with no probs

[KERRSURF]

I usually engage 4wd at low speeds, I'd check front diff oil levels if I were you.

[TonyN]

To reduce C/V boot wear and driveline drag, it's best to fit free-wheeling hubs too as well as this modification.

I wouldn't do it without them TBH.

I've never any hassle with the ADD system on any surf i've owned, apart from a hole in one vacuum hose where the steering shafted rubbed on it, but that was because of the body lift so not its problem.

I guess its cos we use 4wd a lot.

[hellmett]

alot of these trucks will need to be moving in order to get into 4wd.Has the front diff oil been changed recently or does it need topping up.I normally have my hubs locked if i know the roads are going to be slippery so then i just press the button and it will go straight into 4wd.On the odd occassion i have had to stop and shunt back and forward a couple of times for it to engage.I think the fastest i have travelled is 40mp and put it into 4wd with no probs

I usually engage 4wd at low speeds, I'd check front diff oil levels if I were you.

(Groans & Shudders!)

Ahh, yes!

Topping up the front diff oil!

I remember that adventure well!

You should have seen the device I rigged up to try and get oil into it, was like something out of Frankenstein's laboratory!

I will check it when I can safely get under the Surf without needing a snow shovel and an electric blanket.

I presume the "buzzz - thunk" means that the 4WD system appears to be working as it supposed to albeit that it might need topped up?

Apart from actually checking the drive shafts etc how else would you know 4WD is "correctly" engaged and working from the drivers seat?

Cheers!

Gary

[hellmett]

Re

Maybe not then!

[dieselboy]

(Groans & Shudders!)

Ahh, yes!

Topping up the front diff oil!

I remember that adventure well!

You should have seen the device I rigged up to try and get oil into it, was like something out of Frankenstein's laboratory!

I will check it when I can safely get under the Surf without needing a snow shovel and an electric blanket.

I presume the "buzzz - thunk" means that the 4WD system appears to be working as it supposed to albeit that it might need topped up?

Apart from actually checking the drive shafts etc how else would you know 4WD is "correctly" engaged and working from the drivers seat?

Cheers!

Gary

People will probably condemn this, but, if you know it's in 2WD, park the back wheels over something slippery, put the truck in drive, press the brake quite hard to stop you moving, and floor the accellerator. The truck will rev until the turbo has built up boost, and then one or two back wheels will spin.
Engage 4WD and try it again. You will know pretty much immediately if 4WD has engaged, as you will need more brake to hold the truck still.
IF YOU DO TAKE THIS ADVICE YOU MIGHT BREAK SOMETHING.

You could park the back wheels on snow and do the same test without a brake.