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Old 08-06-2014, 08:15 PM   #1
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Trans, clutch or TOB bad?

Ok...clutch and throw out bearing are only maybe 6 months old at most. I have been kind of suspect of the clutch and TOB though. Autozone brand and were noisy almost right after install. I wheel pretty often and see a lot of mud. USUALLY pretty good about changing my fluids.

Last time up to Rausch Creek off road park I was buried DEEP in water for about 5 mins. I checked my diffs there and drove it 2 hours home. I dont DD the Jeep, it sat a while and I forgot about the whole ordeal honestly.

Took my brother for a trail ride (no wheeling really, fired roads and such) before he left for college and the whole time out the noise I always thought was the TOB was getting louder. Trans also didnt sound great in reverse.

Right before we left I noticed the "TOB noise" wasnt so loud. As we leave it started to grind on every down shift and very bad into 2nd. Pretty much have to be almost stopped to get into 2nd. Fifth gear sounds bad when you let off the gas and reverse doesnt sound good either. It also "wines" in 1st-3rd"

Fluid has been drained, flushed and filled and driven about 1/2 mile with no change.

Thoughts?

Thanks.

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Old 08-06-2014, 09:00 PM   #2
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A throw out bearing that is bad should only make noise when clutch pedal is pushed down when were you hearing the noise you attributed to the throw out bearing?

When the clutch was recently replaced did you do it yourself. If so, what net hod did you use to bring the tranny bell forward the last little bit so that it was directly against the rear of the engine
Wiggle or pull it home with bolts?

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Old 08-06-2014, 09:37 PM   #3
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Noise I heard was when the clutch was out.

Friend and I did the clutch while the motor was out. It went together pretty easily with a lil wigglin and if there was any gap left it was brought together with the bolts. Wasn't the first time we had done a wrangler. Don't recall anything out of the normal when. Installing. Everything worked fine, just thought it would have quieted down for longer.

I was always told by others that noise when the clutch was out but gets quiet when you press is the TOB.

Obviously net diagnosis is hard. Just trying to have an idea of if I need a trans on standby. Won't have more then a day to pull this off prob.

Thanks.
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Old 08-06-2014, 09:55 PM   #4
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Normal throw out bearing has no motion when pedal is up but when pedal is down its front face is spinning at engine rpm and center is still so if bad typically noisy when clutch is down

The transmission input was never designed for axial load and pulling tranny home with bell bolts can exert very significant axial load
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Old 08-06-2014, 09:56 PM   #5
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What did drained fluid look like

Contaminated with water?

Metal chunks?

Brass bits giving it a golden yellow hue?
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Old 08-06-2014, 10:03 PM   #6
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Like I was saying I don't think there was much if any gap to speak of sucked up by the bolts. Honestly don't remember. Did two motor swaps that week. Lol

Contaminated with water. I've seen worse but def had water. Enough to be a little too full. No chunks of anything big enough to get caught in the screen I was using. No brass chunks or bit noticed. Only color was the lighter brown you'd expect when water is present.
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Old 08-07-2014, 07:25 AM   #7
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I was also told clutch in noise goes away was TOB, if not what is it? (mine does this now 140k on it)
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Old 08-07-2014, 09:54 AM   #8
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As Digger84 said, if noise is present with clutch pedal up (clutch engaged), it is not the throw out bearing as it is not spinning at that time. If you have spinning type noise with the clutch pedal up and the transmission in neutral, it is most likely the transmission input shaft bearing. If you do not have the noise, in neutral, but do have it in gear with the clutch up, it is most likely one of the other bearings (or more than one) within the transmission
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Old 08-07-2014, 10:04 AM   #9
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TOB can make a rattle sound while the clutch pedal is "up"....FWIW

Not sure what noise the OP is describing...but to say a TOB cannot make noise when clutch is up is a flat out lie. It most certainly can make a rattle. Especially right before it grenades.

now if it's a bearing sound we're talking about I concur with above people.
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Old 08-07-2014, 11:09 AM   #10
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TOB can make a rattle sound while the clutch pedal is "up"....FWIW
The "rattle" sound heard with the clutch pedal up is commonly a broken (or missing) return spring on the passenger side of the release arm allowing the release arm to rattle against the pivot ball. The noise being discussed is a bearing (spinning) noise, and as stated, the throw out bearing is not turning with the pedal up.
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Old 08-07-2014, 12:03 PM   #11
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The noise is hard to describe it kind of sounded rotational or spinning though.

How ever ...noise aside, do my symptoms sound more trans internal l, clutch or tob? I don't know what a failed TOB does.

Again I know its hard but here's what I'm looking at. Tuesday and wed are my only days to do this before my trip so if I take it out and the trans is bad I need to have one there ready or near by. How ever I'd hate to spend $500 pull it out and its just a TOB and I'm out 500.

I'm prob gonna end up picking up a trans.
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97 sport 4.0 5 spd
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HP30-Eaton E locker D44-Detroit locker-4.88 Ten Factory Chromo shafts.
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Old 08-07-2014, 12:57 PM   #12
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Quote:
Originally Posted by srad600 View Post
The noise is hard to describe it kind of sounded rotational or spinning though.

How ever ...noise aside, do my symptoms sound more trans internal l, clutch or tob? I don't know what a failed TOB does.

Again I know its hard but here's what I'm looking at. Tuesday and wed are my only days to do this before my trip so if I take it out and the trans is bad I need to have one there ready or near by. How ever I'd hate to spend $500 pull it out and its just a TOB and I'm out 500.

I'm prob gonna end up picking up a trans.
Does it make noise in neutral or just in gear with the clutch pedal up?
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Old 08-07-2014, 01:03 PM   #13
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The noise I thought was TOB noise went away when the trams starting acting up. Now there is no noise in neutral. It used to be in neutral only. Not in gear with pedal up.

Only noises now are in 5th and reverse sounding bad and grinding on all down shifts.
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Old 08-08-2014, 12:16 PM   #14
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Mines in Neutral only, sorry not trying to highjack just learn about my noise..
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Old 08-08-2014, 03:05 PM   #15
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Quote:
Originally Posted by srad600 View Post
The noise I thought was TOB noise went away when the trams starting acting up. Now there is no noise in neutral. It used to be in neutral only. Not in gear with pedal up.

Only noises now are in 5th and reverse sounding bad and grinding on all down shifts.
My guess is transmission.
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Old 08-08-2014, 03:10 PM   #16
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Mines in Neutral only, sorry not trying to highjack just learn about my noise..
If it is only in neutral with the clutch pedal up and it's a spinning (bearing) noise rather than a rattle, it's most likely the transmission input shaft bearing.
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Old 08-11-2014, 12:39 PM   #17
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Gonna toss in a "new" trams this week.

Guy has both ax15 and a nv350. The nv is lower miles. I'm hearing its an "upgrade" for me?
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Old 08-11-2014, 11:23 PM   #18
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I didnt wanna make a new thread, but from all I can tell there isnt much difference between the two?

The NV3550 tends to be a lil louder, and has in most cases fewer "reported" failures. Less then a half inch longer but 20lbs heavier with a shorter throw shift. That about it?
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HP30-Eaton E locker D44-Detroit locker-4.88 Ten Factory Chromo shafts.
KC/Hella, Engo 12k, LED rock lights, "train" horns, Home made-Hand Throttle, OBA, Etc etc.
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Old 08-17-2014, 11:40 AM   #19
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Quote:
Originally Posted by Water Dog View Post
If it is only in neutral with the clutch pedal up and it's a spinning (bearing) noise rather than a rattle, it's most likely the transmission input shaft bearing.
Thanks, does that mean a trans rebuild or is it done while doing the clutch?
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Old 08-17-2014, 12:16 PM   #20
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That is not part of a clutch job but at least the clutch job includes removing the tranny which is the first step in a transmission rebuild

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