noise coming from trans

[Cummins Cowboy]

My truck is a 5 speed see sig. I did notice after crawling under my truck some time ago that the getrag has a tag on the side of it that says remanufactured on it. Seems a previous owner had a prob with the trans it also has a date on the tag that says sometime in '97. Well I haven't had any probs out of the trans it shifts pretty good only have trouble going into first every now and then. It isn't a very noisy trans the only noise I hear out of it is when I lug down 4th or 5th when towing. But I have noticed that while ideling sitting in the cab with my foot off the clutch and the trans in nuetral. there seems to be a slight chattering or noise comeing from the trans. I was wondering what you guys think it might be.

 

[BushWakr - RIP]

Does the sound go away if you push in the clutch pedal?

If so, it may be that the throw-out bearing is going bad. Or maybe the pilot bearing perhaps?

Any other ideas guys???



Bob

 

[Bob Beauchaine]

I've got to go with BushWakr - the throw out bearing would be my first guess. Especially if the noise goes away when you push the clutch pedal in.

Happy trails

Bob

 

[South Bend Clutch]

Actualy guys, if it were the throw out brg. , the noise would be more prevelent when the clutch peddle is pushed in. This is when the throw out is being used. The only thing that happens when you push in on the clutch is the input shaft stops turning so you are allowed to shift. Now the pilot is in the flywheel so it is still turning on the now stopped input shaft so my guess would be if the pilot brg. /brass bushing is worn, this would allow the input shaft to oscilate in that area thus causing the noise. Also if the noise starts when you start letting up on the clutch peddle then that is when the input shaft starts to move again. This kind of noise can be dirrectly related to the transmission.



Peter

 

[KMC]

Sorry guys I do not have a solution but the same problem. After long runs at idle I can hear noise... push the clutch in and the noise stops. But it is intermittent... Short trips I do not hear the noise but after long trips 2-3 hours plus I get the noise. My truck is a 93 w/ 60k miles. So far the getrag shifts fine except has a hard time going into second from a standstill now and then. So is this noise when the clutch is out problem a forboding of a disaster to come? How soon? Will I have enought time to save up for the NV4500? I don't want to put anothe getrag back in.



Thanks, Ken

 

[AlK]

I have also noticed this in my truck. However, I find that quite often if I push the clutch pedal to the floor and then let it back up the noise will stop. It has been doing this on and off for approx. 2 years, other than that the getrag is working fine.

---

Al

 

[Cummins Cowboy]

Yeah my noise also seems to be somewhat off and on. It seems to have gotten louder with the more pulling I have been doing with it lately. I am very concerned about how terminal this could be to the trans. I am thinking on are pure economic standpoint here. I figure my truck is worth 5-5. 5 k and if I have to sink 2 k into a new trans. that is already half of what the vehicle is worth. I would rather save the 2k and get another truck now and put it toward a newer truck. Besides if I end up fixing the trans it will not be too much longer until the VE may need to be rebuilt as well.

 

[Diesel_Junkie]

I would never replace a Getrag... waste of $... plus the cost of the parts for an NV4500 will probably increase the resale value of the truck by more than the parts cost.



The throw-out bearing could easily be whining when it is under viirtually no load with the clutch out and then quitet down when loaded with the clutch in.



My Getrag wined a lot in 5th before the internal splines in the 3rd gear all sheared off... that transmission sucks... I broke it with the truck completely stock... .

 

[ScottB]

I just have had my Getrag rebuilt. It makes the same noise I think you all are talking about. I think it is just the way the transmission is. Now, I know that I may get flamed bet here goes. I don't think that the Getrag is as bad as people say. Standard trans says it is a heavy built trans. It just suffered from a oil starvation problem that could be fixed by overfilling by one quart. I just had mine built for 800 paceos. I ordered my parts from Standard trans and gave them to my trans man American Transmission. And saved myself at least 500 on the rebuild. So its not that bad to rebuild it just don't put it off when you know its going, sooner you get it built cheaper you will be able to do it. A standard rebuild kit is very cheap. Hope this helps, sorry for long post. Scott

 

[rwinslow]

Getrag now has 279,000 original miles on it. Making same noise as described in this thread - the hotter the transmission, the more noise which would possibly indicate worn input shaft bearing. Overfilled transmission by 1 qt. with a non-sulfated Gp II Base Stock EP Gear Oil - eliminated the input noise except after extended operations. Unit also shudders on initial clutch engagement when the transmission input shaft noise is also present. Will pull transmission soon and install bearing / seal / synchro re-build kit and check clutch / flywheel / pilot bearing etc. Comments / anything I missed?

 

[Paychk]

You might want to drain and replace your lube in the transmission, the manual spec's 5w-30 motor oil. Anything else can result in damage, as regular gear lube is to heavy to make it up to all the bearings and damage is likely.

 

[rwinslow]

Noise in Transmission

Tried the 5W-30 approach - even over-filled it by 1 quart -still sounded like a rock crusher in neutral with the clutch out. (See my previous post) Note that this gear lube does not use any sulfur for the EP additive. Overfilling it by one quart gets the level up where the upper bearings are lubed quickly on start-up and stay lubed during operations. Idling for a short period of time in neutral on start-up forces lube to all of the bearings and gear surfaces. Note also that 75W-90 Gear oil is not the same viscosity as 75W-90 Motor oil. 75W-90 Gear oil has about the same viscosity as 30W-50 Motor oil. This is not meant as a permanent fix - just thought I would pass it on to the others if they need to nurse a transmission along for a while before they tear it down. I would definitely not tow anything heavy for a long distance with this transmission in this condition.