94 Pajero front issues

[lincooln]

Hi all

Its been a while.

Truck is a 94 4M40, Auto, V46 LWB

I have a few issues. Firstly when I now drive in two wheel drive the left front hub tries to engage and the 4wd lights flash and there is a nice grinding noise, so currently driving in AWD. What is the best option for replacement/cheapest? On a fairly tight budget at the moment. Would AVM manual hubs be ok? or should I just get the standard ones? And could it be something else other than the hub?

Next, I need to get the driveshaft assembly, from front diff to hub for teh right hand side. The inner CV has had the split boot for who knows how long and the outer CV is noisy as currently. So where is the best place to source this? Thought I may as well replace all of it.

the other issue is the alternator but that is not so important as I know where to take that etc.

Cheers
Lincoln

[Team Tonka]

Front left, (passenger side?), this hub does not disengage so problem could be with transfer case. Put it in 2wd stick your arm under and see if the front prop shaft spins. Make sure the low range lever moves as it should. I've seen body lifted ones foul the body.

Replacement cv's are readily available, but if you use it much off road I'd steer clear of aftermarket gear as the ones I've met are not as strong as the mitsi ones. Second hand mitsi would be the best bet. Check all the ball joints whilst you have it apart too.

[quick6]

As above pop it in 2wd and check if the front prop shaft spins. I just wanted to add when you do this your engine will have to be running as the front diff disconnect is vacuum operated and if its anything like mine it wont stay disconnected long with the engine off. Mine was doing a similar thing and it turned out the left hand cv/shaft had worked its way out of the hub. Does the noise stop in 4wd H or 4wd H Lc? Or both?
Also you mention an alternator issue. This can be straight forward as you say, but these motors have an issue with flogging out the rubber in the harmonic balancer (big pulley on front of crank that drives all your belts). This can result in a variety of bad endings, one symptom is a lack of drive to your accessories. Have a look at the bottom pulley with the engine running and check its not wobbling. With the engine off make sure you cant get your belts to spin by hand and that they are all running in line. Just have a good check that the outer part of the pulley has not separated from the inner part. It could well be just your alternator but trust me, it is well worth checking.

[lincooln]

sweet, cheers guys. I will have a play this afternoon and report back.

[NJV6]

I reckon its related to the disconnect on the front diff. Get someone with you to put it in and out of 4H into 2H while you climb under, pull the rubber boot off the actuator arm and make sure it is moving. At least pull the rubber hoses off and make sure they change vacuum as the other person moves the lever from 2H to 4H. There can be no load on it when doing this as the transfer case tells the solinoids when to change vacuum so if it can't get out of 2H it won't tell the front to change.

Hope this makes sense...?

[lincooln]

I reckon its related to the disconnect on the front diff. Get someone with you to put it in and out of 4H into 2H while you climb under, pull the rubber boot off the actuator arm and make sure it is moving. At least pull the rubber hoses off and make sure they change vacuum as the other person moves the lever from 2H to 4H. There can be no load on it when doing this as the transfer case tells the solinoids when to change vacuum so if it can't get out of 2H it won't tell the front to change.

Hope this makes sense...?

Ok so yes I think its the front diff disconnect. It will now not ever move the actuator rod/disconnect from 4wd. If I pull off the vacuum hose from the back of the actuator it sometimes will move the rod, but not all the time. It sits out and would move in quickly but would then pull out slowly. When bot lines were connected it would not do anything.

The line from the back of the actuator (on the RH side of the diff) was off, it would always have vacuum but sometimes less, So I guess it is the other line that is not building up enough vacuum?

Hope this makes sense,
Cheers

oh and the alternator is just worn, bearings are going and so are the brushes. I did check the pulley and it was all good. cheers

[NJV6]

So check all the vacuum lines for leaks, check the 2 solenoids work as they should, one has a yellow dot and one has a blue dot, they are mounted on the guard by the air filter. The solenoids are known to fail.

I have had to replace the outer end of my actuator as it gets full of crud, eventually the spring (that always pulls it into default 4WD) fell to pieces with rust.

[lincooln]

cool, cheers. I will get onto it.

Thanks for all your help?

[lincooln]

playing with the solenoids, it works sometimes, so they must be at fault. Will replace and see what happens.

Thanks for all the help guys, Much appreciated.