Speedo cable & 4WD Knocking noise

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Nov 19, 2006 | 06:36 PM

#21

General Pathology

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Re: Speedo cable & 4WD Knocking noise

Thanks Mike,

Your help was very useful and much appreciated!

Adam

On Nov 19, 11:01 am, Mike Romain <roma...@sympatico.ca> wrote:
> Your t-case is a 'shift on the fly' one for 4 high. You can shift into
> and out of 4 high at any legal speed. I treat it just like any other
> shift in my Jeeps. When I see a snowy patch coming on the highway, I
> shift, then when I see clear again I shift back to 2 wheel drive. I
> also find 4x4 is nasty when turning left at a slushy intersection
> because one front wheel has to scuff so it gets up on top and wants to
> go straight so I shift to 2 wheel drive for that, then back to 4x4 as I
> come out of the turn.
>
> Your 4 low can only be shifted when either stopped or rolling along at 2
> mph or so. Most like to be moving slowly for the best shift, but they
> pretty much always clunk a bit.
>
> The knocking in 4x4 is not a good thing. I would be checking the 5
> front u-joints out for a bad one. The driveshaft has 3 and there are
> one at each axle end.
>
> If you have a bad engine mount, the engine can slide over and the front
> Yoke can hit the exhaust making a good knock or grind. The driver's
> side one seems to go first.
>
> Your front axle locks via a vacuum motor when you shift to 4x4. If this
> is leaky, it might not allow a front lock which can be noisy.
>
> The speedo cable goes into the back side of the t-case.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> General Pathology wrote:
>
> > Thanks for your suggestions...I will keep you posted...
>
> > I stop the vehicle...shift into 4H...then reverse 5 feet to
> > engage.....then drive.....???
>
> > On Nov 18, 10:14 pm, "Micah" <mgoodenb...@gmail.com> wrote:
> > > Speedometer cable goes to the driver's side of the transfer case. It's
> > > pretty hard to miss, should be pretty simple to replace.
>
> > > Is the Jeep moving when you shift into 4WD?
>
> > > General Pathology wrote:
> > > > Hey Guys,
>
> > > > I just bought a 88 YJ after only owning an 04 TJ...whole new
> > > > can'o'worms. First the speedo cable needs replacing...where does the
> > > > cable run to? Transmission or transfer case?
>
> > > > Second, driving in 2wd is fine but when I switch to 4H or 4L I get a
> > > > loud knocking noise. Should I start by replacing the fluid, or would
> > > > this be pointless and I am looking at a much larger problem?
>
> > > > Thanks,
>
> > > > Adam