vibration, prop

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Hi Guys
A while ago we discussed that if you have a CV problem you could drive home
if you disconnected the front prop.
Well With all thats going on with my cruiser I wondered if I can discount or
include a few things while I wait on a guy I got to look at it, which will
not be for over a week.
I suspect the vibs are coming from the front end, prop, flange etc.
What speed can you travel at if you disconnect the front prop in order to
eliminate it or include it in the theory.
If you disconnect the front prop from the front diff and the transfere case,
can you leave it like that for a while or would the driving be too slow.
I am getting a vib and rattle in the steering now even at low speeds so all
seems to be going according to the evil plan.
Do UJs or other bearings have a sudden failure or is it a thing that they
slowly die.
How can a prop suddenly get out of spinning harmony without getting a bang
of something like a rock.
Or where the noises a preminition to what is going to happen on a dark,
cold, wet, night in the middle of nowwhere.
Just would like to know so when I hear a bang travelling on the motorway I
can say to myself O s--- its just the drive shaft falling off, tearing all
the drive train with it including the diffs and we ran over it, or to the
wife, thats just a bump in the road.
john 92HDJ 80 1HDT
 
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Hi Guys
Well maybe just maybe something is on my side for a change.
I found the sourse of the clanging noise I have bugged you all about.
You can go out and celebrate I hope I wont be causing any more hassle , at
least about this.
Toyota could not or did not want to find this noise and I dont understand
how they did not.
If you remember they replaced the rear drive shaft flange alone with the
seal only a few weeks ago.
This was when the noise was there already.
So I have found the cause is the UJ coming out of the transfere box on the
front prop.
Only by chance did I find it because all the time I checked for the noises I
was tugging at the ends of the props that go into the diffs.
Today I just happened to grap the shaft a little higher up and there it was
my clanging sound.
Took off the body armour, right ( plastic bit) that covers this part and
tugged on the shaft.
WOW a lot of movement and clanging .
Now I have to ask the questions sorry.
With this UJ worn will it or could it snap off untill I can get it done, or
just get noisier????
Should I replace all the UJs because if one is gone does it make sense that
they are all on their way out, same mileage on all of them 215,000 miles.
????
Would I be right in thinking there are four of them, one at each end of the
shafts. ????
thanks
john 92HDJ 80 1HDT
 
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John,
GLad you found the problem.
You only really need to replace the one UJ - just make sure the others
are well greased.
The key thing with UJs is that they can be a pain to check properly -
usually best to park on level ground, put in neutral and then check the
UJs - this takes the tension off the propshafts and makes it easier to
wiggle the UJs - but it does need to be levell ground!
With the propshaft off, it is worth makking sure that the other UJ is
well greased and also make sure the mmain shaft is well greased - it is
best to pull it apart (marking where it is aligned) and then clean off
old grease and then re-apply new grease - don't use the grease nipple -
you can end up pumping too much in with makes it hard for the shaft to
compress when you go over bumps which puts a lot of pressure on the
output shaft on the transfer case and input shaft of the diff.
Once you get the UJ, most competent mechanics should be able to replace
it.
Re the CV 'exploding' - it takes a lot for this to happen, but to be on
the safe side only drive the car if you have too and take it steady
avoiding any major accelerating/decelerating. Depending on how far
goone the UJ is, it might help to pump some grease into it.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
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Hi Julian/Jon
Thanks for that info.
Ok maybe im wrong but when you pump grease into the shafts as you are
adviced to do and you see grease coming out of the shaft as it does when its
full.
Then if the pressure in the shaft as you say increases when going over a
bump would the grease not just come out the same way as when you pump it in
there.
If the only way of greasing the shafts properly without using the nipple is
to take them apart thats more work.
I know liquids dont compress but did Toyota not think of this when designing
the props.
Or is it also like the nipples on the CVs that Toyota say to put greas in
but yet advice is to strip the whole housing down to do it properly.
john 92HDJ 80 1HDT
 
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Hi John,
In theory it should, however over time the grease dries out and the seals get
clogged which makes it harder for the excess grease to be dispelled.
So as a precautionary measure I recommend stripping the propshaft, cleaning it
off with degreaser to remove the old crap and then liberally apply new grease.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
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Hey Julian
So would you get the same result if you kept pumping in the grease untill
you were sure it was all new grease coming out as over flow.
john92HDJ 80 1HDT
SNIP
 
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Hi Guys
So there are only two nipples on the shafts one for each, only at the skinny
ends.
I cant find anymore.
If the shafts are taken off as they will be to replace the UJs will the
skinny part of the shaft come out of the larger bit and then all the grease
is in between.
I ask simply because as I wont be there when they strip the shafts I still
would like to know what the set up is, if you know what i mean.
Is it a good idea to insist on new bolts and nuts when they do every thing
up again or am I going over board again.
thanks
john 92Dj 80 1HDt
 
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Hi John,
No because that wouldn't push out the old grease properly. You can beat a
proper strip down and clean out.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
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Hi John,
You get one nipple per propshaft and yes it is at the skinny end. Of course
you also have a nipple on each UJ.
Correct. When pulling them apart, make sure that you mark both parts so that
they go back in the right way - if you rotate either part and put them together
it could affect the balance of the shaft.
No, not necessary.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
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Guest

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Hi Jon,
I've had a problem getting the grease gun on some of the nipples,
particularly on the UJs supplied from Milners. What I have done is to get
replacement nipples from a local agricultural supplier that are easier to
get at.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
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Hi Guys
So is there four nipples, two on each shaft where the UJs are.
I can find the ones at the shinny ends but not at the other ends.
john 92HDJ 80 1HDT
 
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Hi John,
There is only one grease nipple on the propshaft and then one nipple on
each UJ.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
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Guest

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Hi Guys
I was just thinking would the angle of a suspension lift wear out UJs
quicker than normal even if as I think the 2 inch lift gives you a 2% change
in angle.
Its just if the angle is not corrected by bushings then would it not be the
props or UJs that have to take account of the changed angles. Just a
thought.
john 92HDJ 80 1HDT
 
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John,
It well may would wear out U-joints quicker, but probably by about 2%.
A 2inch lift is considered safe without further mods and teh u-joints
won't bind at max articulation.
--
Rgds,
Roman (London, UK)
'92 HDJ80
On 6/5/07, John Byrne <[Email address removed]> wrote:
 
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John

>>>> Re UJ replacement

If you're outsoursing the job - recommend Drive shaft Services in Dublin- they recently changed out a UJ for me. You can supply the UJ's or they will - no real cost advantage of supplying them yourself

Drive Shaft Services Unit 13c Parkmore Industrial Estate Longmile Road - Dublin 12 - Ireland Tel: 353 1 4501905

Drop-in and pick up 2 hours later.

You won't need to replace the nuts & bolts unless you ring them when removing.

Cheers

Niall
 
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