Help! RARE noise coming from transmission - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 06-09-2017, 11:30 AM Thread Starter
 
Join Date: Jun 2016
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Help! RARE noise coming from transmission

Hi guys, hoping to get some opinions on this. I am kind of in panic mode at the moment. I own a BABIED 2004 GTO 6 speed with 75k on the clock. A noise recently started emitting from the tranny when in gear which really has me confused. It happens when in all gears, but 4th is significantly louder than the others. It's also there in neutral but much more faint. And only when the clutch is out. Now what is strange and also relieving is that it is NOT a grinding, whining, growling or clunking noise. In fact I went through dozens of youtube examples of bad transmission noises and mine does not resemble any of them. The most accurate way I can describe it is like a wheel on a skateboard spinning. It does not sound like something is broken, but rather I am hearing a normal function which shouldn't be so loud. Car shifts likes butter and drives like new. I rarely beat on my GTO and have always taken good care of it and been conscious of my driving habits. At 75k miles there should be absolutely no major issues. I am going to swap my tranny fluid very soon and pray that solves the problem. But in the meantime I am hoping someone else has experience with this and can shed some light and give me peace of mind. Thanks.
LSxSWAPS is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 06-09-2017, 01:12 PM
 
GTO44's Avatar
 
Join Date: Apr 2016
Posts: 316
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Definitely try swapping the fluid. It's pretty easy. There's a drain plug on the tailshaft, and use a bottle pump to get the new fluid into the reverse light sensor hole on the passenger side. 4.6 quarts

If that doesn't work here's a couple of ideas:

Our T-56's have been known for 5th and 6th gear coming loose on the shaft. I've never heard what that sounds like but just thinking about different things that could have gone wrong. The sound would also change depending on what gear you're in which sounds like is happening.

Could also be a bad pilot (throw out) bearing causing the input shaft to wobble or vibrate. Could also be a worn or bad output shaft bushing causing the drive shaft yoke to move around while spinning.

Could also be anything internal, like your friction or blocker rings going bad. Or bearings.

Is the clutch slipping at all?

If not best bet is to take it to a reputable trans shop for a diagnosis.

Also make sure it's not a driveshaft or diff related problem. For example, I thought I blew up my diff because I had such a bad vibration coming from the rear after the first time I ran DR's at the track. It ended up being a bent trans yoke and making the driveshaft vibrate which made the diff vibrate. Noises and sounds can carry thru the drive train so make sure you check everything.

2006 GTO M6

Motor - Stock with Vararam
Bunch of suspension
Bunch of brakes
Stock tune

365/368 std
12.81 @ 110.6 2.03 60'
GTO44 is offline  
post #3 of 3 (permalink) Old 06-09-2017, 02:35 PM Thread Starter
 
Join Date: Jun 2016
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for your input GTO44. Correct me if I'm wrong but I believe if it was the throw out bearing it would be noisy when I press the clutch in. In my case it's opposite.. After researching it seems like bearing related issues cause whining, grinding or vibrations. I'm trying to be optimistic and say that it's not a bearing because I really can't deal with that repair.. I also didn't know that 5th and 6th gear are known to loosen like that. Could my 4th have?? But if that was the case I don't think the other gears would be making noise too. And that gets me thinking about the blocker ring or driveshaft yoke theory. If that was the case, why would 4th gear specifically sound louder? There's no vibration or wobbly noise, no metal on metal sounds. Also my clutch doesn't slip whatsoever.. In fact there are virtually no issues driving my car and never have been.
LSxSWAPS is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 2004-2006 GTO > Service, Maintenance and Technical Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Same noise clunking coming from gearing I T8 I Drive train, suspension, alignment and brakes. 22 06-18-2015 11:01 AM
noise coming from shifter or transmission jksb1982 Service, Maintenance and Technical Discussion 4 11-16-2009 08:12 AM
grinding noise coming from rear end banshee Service, Maintenance and Technical Discussion 2 08-07-2008 06:54 PM
Growling/Clunking Noise Coming from the Rear GTO JUDGE Service, Maintenance and Technical Discussion 0 08-28-2007 01:08 PM
Low frequency noise coming from the rear 04m6_ca Service, Maintenance and Technical Discussion 7 08-29-2005 04:42 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome