4wd popping noises and hard to engage

[Minivek]

Hi, I've got a couple a questions I'd appreciate answers for, I can only put my truck in 4wd (that's HI) when i'm stopped, as soon as i'm rolling I can't do it whereas before I could although it took a couple of tries before working (less than 20 mph), What's wrong with it? It also makes a weird little grinding whirring noise (seems as though it comes from the dash or something) with the 4wd HI light on when it doesn't engage. Also, once the 4wd is engaged I hear a popping noise in the front as I move forward a bit to engage it but it seems to pop on the left before the right side.

I also get a popping noise while turning a little on any surface but it goes away if I turn more(sharper turn) ( I stop turning anymore, before it binds). Also could rusty u-joints in the front be a reason?

Thanks

 

[Minivek]

double post

Sorry about that, I got the wrong forum... I just wanted to get more answers, faster.

 

[Josh S.]

hmmm...could be your hubs if you've got auto ones. My friends made a lot of noise when his went out. Switch to some Warn manuals if you haven't already.

 

[Minivek]

Yeah I've been thinking about it... kinda tired of babying those auto hubs so much... I can't figure out why they are so cheaply made... who'd put plastic in there.....

 

[Josh S.]

yah seems a little wierd having plastic holding up your entire 4x4 system, but oh well. Just spring for da manuals. Should run you about 230ish (US)