new member need help

[Geordie]

hi to all fellow patrol owners.
I bought a 1999 gu 2 days ago and believe I have bought a lemon.

I silliy didn't check the 4wd system before buying and did some research on the rd28. (being under powered).
Now I tried out the 4wd system and all bad things. noises and wheels kinda trying to lock up when turning even the smallest amount. I have taken to 4wd mechanic and he took for short drive. came back and told me the diff in the front is gone and the rear is also just about there. I have now bought new (second hand) diff centers and soon will begin the tare down.. not ever having worked on 4wd the front diff mainly removing the axles worries me.. I wonder if there are any special tools needed ?? also and tricks I need to know before going ahead..
secondly mechanic has told me the turbo isn't working properly I just thought it was just a under powered 2.8.. I will most likely take back to mechanic to fix the turbo issue but will have a go at fixing, if anyone can point me in the rite direction.. I believe the turbo is working but its something else related to the turbo from what the mechanics has said..

[GQtdauto]

Dude the wheel gripping and shuddering when turning in low 4wd is normal and due to the great limited slip doffs we have .
Welcome to the forum mate.

[AB]

Hi, welcome to the forum, sounds like a bit of a disaster!

Did the mechanic tell you what that something else was by chance?

One thing you can do is to take off the pipe that goes from the air filter to the turbo, look inside the turbo and you will see the turbine part of the turbo, take a photo of that and show us.

Also, see if you can move the turbine left to right to see if the shaft of the turbo is loose and moving potentially hitting the sides, etc.

Do you know if your car has diff locks? are there any buttons in your cab saying diff lock or symbols of this by chance?

Is he a specific 4wd mechanic or a general mechanic? I have seen mechanics that have zero idea about 4wd's in my time.

[GQtdauto]

Dude the wheel gripping and shuddering when turning in low 4wd is normal and due to the great limited slip doffs we have .
Welcome to the forum mate.

If you have had a good mechanic look at it and he reckons they're stuffed I stand corrected should have read the whole bit but it is normal in low gear for the rear to skip and shudder like you say .

[GQtdauto]

Makes me wonder about the diagnoses is he a great mechanic that can pick that up just by driving it or is he guessing as AB has said some mechanics are useless .
Does it drive ok and turn ok without using low gears .

[Geordie]

I will get onto pics in coming days.. and no to any diff lock switches.. I went to 4wd specific mechanic didn't wanna waste my time with a joe blow..

[Geordie]

the is some weird feelings when turning in carpark just in 2wd.. witch would be rear diff binding up.. as for the front its just horriable not driveable.. sounds like its going to brake something..

[GQtdauto]

So it was like that when you bought it or just happened all of a sudden ? If it was like that when you bought it sounds like you could have a problem then .

[Geordie]

it was like that when I bought it I think.. I just didn't know what to look for well enough.. and I read so much saying they were slow with the 2.8 so when id drove slowly I just thort normal.. and didn't try the 4wd so should have but to late now.. just sucks there people like this out there ready to rip of others.. o well I will fix it all up.. I still love it.. just need to ls swap it lol

[GQtdauto]

it was like that when I bought it I think.. I just didn't know what to look for well enough.. and I read so much saying they were slow with the 2.8 so when id drove slowly I just thort normal.. and didn't try the 4wd so should have but to late now.. just sucks there people like this out there ready to rip of others.. o well I will fix it all up.. I still love it.. just need to ls swap it lol

Yes mate there a few flogged ones out there I'm just amazed at two shot diffs because they are tough as nails usually .

[Dhuck]

Welcome to the forum mate

[happygu]

Something doesn't quite add up .... where abouts are you based?

The Nissan Diffs are fairly rugged so it seems to me like there is something else at play, like a broken CV, Hub, or even something as stupid as the seller has removed their diff locker and put in the wrong diff ratio to sell it off as that was the only one they could find that was handy.

If you can do it, get it up on a hoist, and then put it in 4wd, mark the wheels with chalk at the bottom and turn the tailshaft by hand to see if all four wheels return to the same spot after one revolution, or you can hear any noises.....

[Geordie]

Something doesn't quite add up .... where abouts are you based?

The Nissan Diffs are fairly rugged so it seems to me like there is something else at play, like a broken CV, Hub, or even something as stupid as the seller has removed their diff locker and put in the wrong diff ratio to sell it off as that was the only one they could find that was handy.

If you can do it, get it up on a hoist, and then put it in 4wd, mark the wheels with chalk at the bottom and turn the tailshaft by hand to see if all four wheels return to the same spot after one revolution, or you can hear any noises.....

so after new diffs installed it does same thing.. ive taken to different mechanic and was told its fine.. so now have spare diffs if anyone needs them hit me up..

[mudnut]

Welcome to the forum. Keep them as spares and and fit a locker in the front diff so you can then can fit it in the vehicle with minimal fuss. Are you testing the 4wd on a paved surface? That will cause the vehicle to buck and shudder like crazy as the diffs suffer from "wind up" and you can break things.

[4bye4]

G'day mate and welcome to the forum.