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post #1 of (permalink) Old 08-24-2005, 08:40 PM Thread Starter
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shifting noise

Hi

Recently I've been hearing a noise that sounds/feels like your going over the grooved roads before a stop sign (not quite as loud though).

This occurs when I shift to 3rd only (up from 2nd and down from 4th).

Any ideas? clutch? what kind of tranny problems?

85 CJ7, 258...

Thanks
Patrick
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post #2 of (permalink) Old 08-24-2005, 09:27 PM
 
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Re: shifting noise

sounds to me like a brass syncro ring is wore out in the tranny [img]/ubbthreads/images/graemlins/frown.gif[/img]
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post #3 of (permalink) Old 08-24-2005, 10:38 PM
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Re: shifting noise

Is this a metal grinding sound as well? Does it take longer for the tranny to synchro into 3rd than the other gears? Do you feel it in the shifter only or seat of your pants, etc?

Preliminary thought is syncro. [img]/ubbthreads/images/graemlins/grin.gif[/img]
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post #4 of (permalink) Old 08-24-2005, 10:57 PM
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Re: shifting noise

I bet Syncro as well...
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post #5 of (permalink) Old 08-25-2005, 05:13 AM Thread Starter
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Re: shifting noise

Hi....

I don't really feel it "in the seat of my pants" more like through the steering column.

I also do get some "grinding" when down shifting into first if I'm rolling too fast.

Would this also indicate a synchro?

How will things progress? Will I not be able to get it into 3rd before too long? Will I not be able to shift into any gear before too long? What else will be happening down the line?

If the syncho is the problem, is this "easily" fixed or I am going to be looking for a new tranny?

Thanks
Patrick
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post #6 of (permalink) Old 08-25-2005, 06:15 AM Thread Starter
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Re: shifting noise

Just to make sure...

The noise going into 3rd (up or down shifting) occurs when I let the clutch out...as I let the clutch out I get the "driving over grooved roads" noise/feeling.

The noise downshifting into 1st occurs when the clutch is pushed in and I try to move the shifter into the 1st gear position.

Thanks
Patrick
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post #7 of (permalink) Old 08-25-2005, 06:32 AM
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Re: shifting noise

so it's not when you are shifting, but rather when you are letting the clutch out... i.e. it's already in 3rd, and as the clutch pedal is ciming up you get the grind. and it's only in 3rd?
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post #8 of (permalink) Old 08-25-2005, 08:35 AM
 
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Re: shifting noise

[ QUOTE ]
Just to make sure...

The noise going into 3rd (up or down shifting) occurs when I let the clutch out...as I let the clutch out I get the "driving over grooved roads" noise/feeling.

The noise downshifting into 1st occurs when the clutch is pushed in and I try to move the shifter into the 1st gear position.

Thanks
Patrick

[/ QUOTE ]

Seems now that you have some clutch chatter, but only in 3rd? And the gears aren't meshing in first. The symptoms no longer make good sense to me. But I'm now thinking about the front bearing being bad (1st gear problem combined with other problems has been the input bearing for me several times)

Wait, unless this is a 3 speed. Then it makes sense that it could be the input bearing...
What tranny are you running?

If the bearing gets worse, it will start to "pop" out of first allll the time and then stop going into other gears as well. (If it's the bearing)
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post #9 of (permalink) Old 08-25-2005, 04:28 PM Thread Starter
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Re: shifting noise

right...already in 3rd...letting the clutch out, get the chatter...but this is only occuring in 3rd...

first is different...the gear grinding occurs when trying to move the shifter into 1st while the clutch is in...

this is a 4 speed tranny (whatever came stock on the 85 CJ with the 258...

thanks
patrick
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post #10 of (permalink) Old 08-25-2005, 05:17 PM
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Re: shifting noise

SR4... possibly T176

My guess (disclaimer: I don't do manual trannies in Jeeps)
1st grinding... syncros (if in fact 1st is synchronized on that tranny... many are not)
3rd... sounds like clutch chatter, possible throw-out issue, or possibly intermediate shaft/bearing issue

Any oil leaking in that area? Like the rear main is munched and oilling down the flywheel? Seems it should affect *ALL* gears and not just 3rd...
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