NP231 chain noise?? (VIDEO)

My 1998 is giving me a hard time lately...

It makes a popping sound ONLY IN 4WD when going straight and it gets worse when I make a turn, the steering wheel even vibrates during the turns.

Do you guys think the noise in this video is coming from a bad transfer case chain?

Info:

- axel u-joints are brand new (Spicer)
- new wheel hubs
- new front differential bearings and seals
- slip joint in the front drive shaft was rebuilt yesterday to eliminate the play it used to have

This leaves me with two possibilities: double cardan joint or t-case.

The noise started after the front differential service and the t-case fluid change (last week).

What do you guys think? Just to be clear: in the video I was driving on beach SAND. In 0:09 the noise is clearly audible during a turn.

Video is private, can't play it.

kstopp said:

Video is private, can't play it.

Click to expand...

Oops, sorry! Now I think it's ok

The sound in the vid is fast and rhythmic, and sounds like a tapping or light knocking. Transfer case popping is loud, more like a bang, and can be felt in the floor, only happens a few times, and you can see the transfer case jump when it happens.

Tim_MN said:

The sound in the vid is fast and rhythmic, and sounds like a tapping or light knocking. Transfer case popping is loud, more like a bang, and can be felt in the floor, only happens a few times, and you can see the transfer case jump when it happens.

Click to expand...

Exaclty, it's rhythmic... it seems to happen in each driveshaft rotation.

Hmmm, and I know that bang your talking about, it happened to me a few times in the past when climbing a steep hill...

So, this sounds more like the double cardan joint (or the u-joints there)?

What do you mean by "slip joint in the front drive shaft was rebuilt yesterday"?

What parts were replaced

kstopp said:

What do you mean by "slip joint in the front drive shaft was rebuilt yesterday"?

What parts were replaced

Click to expand...

The slip yoke and the spline shaft, like this:

http://www.dennysdriveshaft.com/p11...kx_slip_yoke_1310_series_16_spline_7.875.html

Oh you replaced that end of the driveshaft? But not the double cardan centering yoke or u-joints?

Yes, replaced that end and the u-joint but not the double cardan centering yoke or the u-joints in it.

The slip yoke had a lot of play and to rebuild the double cardan joint I need to buy the centering ball kit from a US parts store and wait for it in Brazil, which usually takes a month or so. Then I decided to do that end first to see if the knocking sound would go away.

Sounds like a centering ball to me.

old_man said:

Sounds like a centering ball to me.

Click to expand...

I'm gonna buy the rebuild kit!

The only problem is that I wil get the kit only in two months.

When I rebuild it I report back here, or in case I find out a different problem in the meantime...

Did I also hear a squealing sound? When the 242 in the '90 Dad had started going away, the he'd get a squeal from the t-case when he would have to hop on it.

The squealing at the end? It's from the brake pedal