1994 XJ shake/vibration @ highway speed

My 94 XJ shakes/vibrates at highway speed and I can't seem to figure
out what's going on. I had a similar problem a couple months ago and
replacing the front drive shaft u-joints fixed it but it's happening
again.

I hear a kind of clunking as I speed up and it stops (or I can't hear
it anymore) from the front end and occasionally I hear a sort of
chirping sound also. I rechecked the front shaft u-joints and they
appear to be fine. I recently replaced the wheel hub u-joints. Tires
are about 4 months old and have been rotated and balanced regularly. If
anyone has any ideas or something else I might be able to check I'd
appreciate it. Thanks.

Rob

When people describe the sound as chirping, it's going to be a
universal joint. If the vibration seems to obsolete, it's be on a
driveshaft. Look for the telltale sign of rust seeping from a cup.
God Bless America, ßill O|||||||O
http://www.billhughes.com/

themophead wrote:
>
> My 94 XJ shakes/vibrates at highway speed and I can't seem to figure
> out what's going on. I had a similar problem a couple months ago and
> replacing the front drive shaft u-joints fixed it but it's happening
> again.
>
> I hear a kind of clunking as I speed up and it stops (or I can't hear
> it anymore) from the front end and occasionally I hear a sort of
> chirping sound also. I rechecked the front shaft u-joints and they
> appear to be fine. I recently replaced the wheel hub u-joints. Tires
> are about 4 months old and have been rotated and balanced regularly. If
> anyone has any ideas or something else I might be able to check I'd
> appreciate it. Thanks.
>
> Rob

Is it likely that the front drive shaft u-joints are bad again after
about 3 months of highway driving? Like I said, I replaced them not too
long ago.

Rob

Only you could tell us that. If you put it together without putting
a dab of grease in each cup and left the zerk fitting in during
assembly, they're dry.
God Bless America, ßill O|||||||O
http://www.billhughes.com/

themophead wrote:
>
> Is it likely that the front drive shaft u-joints are bad again after
> about 3 months of highway driving? Like I said, I replaced them not too
> long ago.
>
> Rob

Sounds like the front hub u-joints again !

Tom T

Isnt there a ball thingy in the front axle joints assembly cardan that drys
out? Mine did years ago but I only heard the chirps at low speed.
KH

"Tom T" > wrote in message
ups.com...
> Sounds like the front hub u-joints again !
>
> Tom T
>

Sure, they can fail if the grease didn't get distributed and they can
fail if the straps are stretched. The straps stretch easy from
vibration and are only a couple bucks to replace.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

themophead wrote:
>
> Is it likely that the front drive shaft u-joints are bad again after
> about 3 months of highway driving? Like I said, I replaced them not too
> long ago.
>
> Rob

Yes, there is a "ball thingy" (I don't know what it's really called) in
my front drive shaft and it was completely dried out and extremely worn
when I had the shaft out a couple months ago. I'll be taking the shaft
out tonight and check that and the u-joints again and see if I can't
get this figured out. Thanks for the help.

Rob

> The straps stretch easy from vibration and are only a couple bucks to
> replace.
Yep!
Most, if not all, u-joint manufacturers recommend replacing the straps when
replacing the joints.


--
___________________
HomeBrewer
http://85cj7.blogspot.com/
http://85cj7.webhop.net/
http://funfacts.webhop.org/
"When you decide something is impossible to do, try to stay out of the way
of the man that's doing it."

I have learned that one the hard way!!! LOL!

Yokes get damaged at the little cap tabs from stretched straps which
gets 'real' expensive if the jerks changing the yokes don't do it right
and you end up needing all new rear bearings or the gears too if you
don't catch it fast...

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

HomeBrewer wrote:
>
> > The straps stretch easy from vibration and are only a couple bucks to
> > replace.
> Yep!
> Most, if not all, u-joint manufacturers recommend replacing the straps when
> replacing the joints.
>
> --
> ___________________
> HomeBrewer
> http://85cj7.blogspot.com/
> http://85cj7.webhop.net/
> http://funfacts.webhop.org/
> "When you decide something is impossible to do, try to stay out of the way
> of the man that's doing it."