Help with Whine
Thread Starter
c6reaperx
Joined: Feb 2012
Posts: 428
Likes: 7
From: Ellisville MS
Help with Whine
I have been looking through the forum for the past week and think that my issue is with the diff. Just wanted some more input.
My 2005 Z51 was in the shop to have the drive shaft and torque tube bearings replaced. I've had her back for a month now, but I have started noticing a whine behind the seats.
Between 3-6 gear, under light load, I get a rolling whine. If I push in on the clutch or accelerate, then it all goes away. It is the most noticeable at 2-3k rpms.
I have replaced the fluid in the diff and trans, then drove a few hundred miles. I am going to recheck the level in the diff as soon as I can. It was leaking out when I capped it up, but I want to be sure.
Thought?
My 2005 Z51 was in the shop to have the drive shaft and torque tube bearings replaced. I've had her back for a month now, but I have started noticing a whine behind the seats.
Between 3-6 gear, under light load, I get a rolling whine. If I push in on the clutch or accelerate, then it all goes away. It is the most noticeable at 2-3k rpms.
I have replaced the fluid in the diff and trans, then drove a few hundred miles. I am going to recheck the level in the diff as soon as I can. It was leaking out when I capped it up, but I want to be sure.
Thought?
Thread Starter
c6reaperx
Joined: Feb 2012
Posts: 428
Likes: 7
From: Ellisville MS
My thoughts are to go ahead and start collecting parts to swap it out. I found a good c5z diff and am wondering if I should by it and have it looked over or just get a c6 diff from rpm..... The z is built stronger so I'm leaning towards it...plus there is no core charge
Drifting
Joined: Aug 2005
Posts: 1,645
Likes: 90
From: Sparks NV
Be very careful. While the diff is a very likely possibility it is not the only possibility. I went thru the same thing with my 2005 Z51. The whine coming on exactly as you describe and progressively got worse over about 6 months. I replaced the diff only to find that wasn't the problem. Turned out it was the trans, probably an output shaft bearing. It made all the noises of a diff issue, I even took it to a place the specializes in differentials and they agreed.
The interesting part is that several people who own 2005 Z51's have had the same issue. It appears to be specific to the Z51 trans. Search for my name "ccmano" and you can read the expensive saga I went through. The problem is that there is no real way to differentiate whether it's the diff or the trans.
Good luck.
H
The interesting part is that several people who own 2005 Z51's have had the same issue. It appears to be specific to the Z51 trans. Search for my name "ccmano" and you can read the expensive saga I went through. The problem is that there is no real way to differentiate whether it's the diff or the trans.
Good luck.
H
Thread Starter
c6reaperx
Joined: Feb 2012
Posts: 428
Likes: 7
From: Ellisville MS
Be very careful. While the diff is a very likely possibility it is not the only possibility. I went thru the same thing with my 2005 Z51. The whine coming on exactly as you describe and progressively got worse over about 6 months. I replaced the diff only to find that wasn't the problem. Turned out it was the trans, probably an output shaft bearing. It made all the noises of a diff issue, I even took it to a place the specializes in differentials and they agreed.
The interesting part is that several people who own 2005 Z51's have had the same issue. It appears to be specific to the Z51 trans. Search for my name "ccmano" and you can read the expensive saga I went through. The problem is that there is no real way to differentiate whether it's the diff or the trans.
Good luck.
H
The interesting part is that several people who own 2005 Z51's have had the same issue. It appears to be specific to the Z51 trans. Search for my name "ccmano" and you can read the expensive saga I went through. The problem is that there is no real way to differentiate whether it's the diff or the trans.
Good luck.
H
Drifting
Joined: Aug 2005
Posts: 1,645
Likes: 90
From: Sparks NV
Good luck
H
Thread Starter
c6reaperx
Joined: Feb 2012
Posts: 428
Likes: 7
From: Ellisville MS
Good idea! I did a complete swap to a 2007 Z06 T56 trans/diff. This got me the the later diff design, the diff cooler and the heavy duty internals in both. I'm very happy with it. Don't forget that your Z51 has trans cooling that std trans cars don't have. The regular T56 or T6060 trans does not have oil pump or the cooling line hook ups. You will need a Z51 specific trans (later ones have shown the whine issue too) or a Z06 setup like mine. The Z06 trans does not have the close ratio gears, but I have to say I don't see much of a difference.
Good luck
H
Good luck
H
Drifting
Joined: Aug 2005
Posts: 1,645
Likes: 90
From: Sparks NV
H
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If it's NOT in the dif or trans, i read about this somewhere. It was the thrust bearing and it wiped the crank out. something about bearings going bad in the driveshaft (inside the torque tube) tearing the bearings apart from the vibration. manual cars had a whine which went away when you pressed the clutch..
Hope that's not it, but google torque tube bearing failure or something similar to that. I'm changing my Tube out this weekend. I went with OEM New complete torque tube. just too much labor to leave to chance. If something else is no good? so be it, it won't be the tube! Good luck
Hope that's not it, but google torque tube bearing failure or something similar to that. I'm changing my Tube out this weekend. I went with OEM New complete torque tube. just too much labor to leave to chance. If something else is no good? so be it, it won't be the tube! Good luck
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Thread Starter
c6reaperx
Joined: Feb 2012
Posts: 428
Likes: 7
From: Ellisville MS
Thread Starter
c6reaperx
Joined: Feb 2012
Posts: 428
Likes: 7
From: Ellisville MS
If it's NOT in the dif or trans, i read about this somewhere. It was the thrust bearing and it wiped the crank out. something about bearings going bad in the driveshaft (inside the torque tube) tearing the bearings apart from the vibration. manual cars had a whine which went away when you pressed the clutch..
Hope that's not it, but google torque tube bearing failure or something similar to that. I'm changing my Tube out this weekend. I went with OEM New complete torque tube. just too much labor to leave to chance. If something else is no good? so be it, it won't be the tube! Good luck
Hope that's not it, but google torque tube bearing failure or something similar to that. I'm changing my Tube out this weekend. I went with OEM New complete torque tube. just too much labor to leave to chance. If something else is no good? so be it, it won't be the tube! Good luck