Need help with this pattern - pics inside
Thread Starter
Staging Lane
Joined: Jan 2006
Posts: 55
Likes: 0
From: Lakeland, FL
Originally Posted by BudH
What he said!
Also, what brand of gears are these? In the dozen or so 10 bolt installs I've done, that is the smallest pinion shim I've seen! I don't think I've ever had to use less than .030.
Also, what brand of gears are these? In the dozen or so 10 bolt installs I've done, that is the smallest pinion shim I've seen! I don't think I've ever had to use less than .030.
Last edited by Firebird!; Mar 3, 2006 at 07:19 AM.
Thread Starter
Staging Lane
Joined: Jan 2006
Posts: 55
Likes: 0
From: Lakeland, FL
Originally Posted by slowpoke96z28
yeah, if its a contant noise, it could be that axle bearing. pull it out and see how it looks. if it looks bad, i'd replace BOTH of them. are/were there any fluid leaks anywhere on the axle? if the bearing isn't just worn from age/mileage, it may have failed because of low lubricant level. also, like everyone else has said, it looks like the pinion is hitting the ring gear too deep. FWIW, even it it turns out to have been the axle bearig causing the noise, think of how much you've learned over this episode.
Originally Posted by Firebird!
A while ago, when I new zero about cars, I took it to dealer to replace window motor (I had extended warranty on that) and they told me that I have pinion seal leaking so I let them fix it (had no idea what is that. That is when they overtighten my pinion nut so the bearing broke later on). I have no idea how long that pinon seal was leaking for, so I assume I could be low on lubricant. I was planning on replacing those axle bearings anyway - already have the new ones - just need to fix the axles a bit. Are those bearings hard to remove? Everything that I have right now is a two and three jaw pullers. Will I have to get a slide hammer or something like that? Thanks
Originally Posted by Firebird!
This is GM Used set of gears from ls1 camaro with about 8000 miles on them. It seems strange to me too that I have to use that small pinion shim - I did try to use 0.031 shim, but I think I have better pictures with 0.024 and 0.011 backlash - I'll try to go higher on a backlash to see how it will look on a weekend. Here is the pics for you to see with the 0.031 pinion shim 0.007 and 0.010 backlash. Thanks
Thread Starter
Staging Lane
Joined: Jan 2006
Posts: 55
Likes: 0
From: Lakeland, FL
Originally Posted by TRex
One possibility is that for some reason you don't have the pinion bearing pressed completely on, then you might have to use less shim. Make sure the pinion, bearings, and shims are completely clean before you press them on. One danger of them not being completely pressed on is that after a few hard launches the pinion could move in the bearing (effectively becoming fully pressed on) and result in a serious mesh change, resulting in noise and wear.
Last edited by Firebird!; Mar 3, 2006 at 12:02 PM.
Thread Starter
Staging Lane
Joined: Jan 2006
Posts: 55
Likes: 0
From: Lakeland, FL
Originally Posted by slowpoke96z28
how long is a while ago? they should've checked the gear lube when they did the seal.
Anyway - I am going to put a new bearings cose I already have them
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Originally Posted by Firebird!
Here is what I was able to acheive with my axles - hope my new bearings will like this axles more than before
One thing I should mention that perhaps you already know about. Although I have not checked them myself, I would assume the bearing surface on the factory axles (and all aftermarket axles) is hardened either via induction or flame. This is done to prevent rapid wear of the metal. Often times this hardness is only a few thousanths of an inch thick. Usually the wear on an axle consist of grooves as well as a condition known as spalling where small irregular shaped flakes of metal have flaked off. This is from impact loading on the bearing surface. This spalling is actually the hardened metal surface flaking off from the soft core.
Depending on how much metal you had to take off to get rid of the grooves, there may not be a significant thickness of hard material left. If you have access to a hardness meter, you could check them and see. If they are not at least 45 Rockwell C I would expect to see very rapid wear the second time around.
I realize you might already know all of this, but I thought I would mention it for others that might be following this thread.
Thread Starter
Staging Lane
Joined: Jan 2006
Posts: 55
Likes: 0
From: Lakeland, FL
Originally Posted by slowpoke96z28
you should replace the cup and cone, not just the cone. the cup has worn with the original cone, and can cause the new cone to wear at an accelerated pace.
Thread Starter
Staging Lane
Joined: Jan 2006
Posts: 55
Likes: 0
From: Lakeland, FL
Originally Posted by TRex
The polish looks good.
One thing I should mention that perhaps you already know about. Although I have not checked them myself, I would assume the bearing surface on the factory axles (and all aftermarket axles) is hardened either via induction or flame. This is done to prevent rapid wear of the metal. Often times this hardness is only a few thousanths of an inch thick. Usually the wear on an axle consist of grooves as well as a condition known as spalling where small irregular shaped flakes of metal have flaked off. This is from impact loading on the bearing surface. This spalling is actually the hardened metal surface flaking off from the soft core.
Depending on how much metal you had to take off to get rid of the grooves, there may not be a significant thickness of hard material left. If you have access to a hardness meter, you could check them and see. If they are not at least 45 Rockwell C I would expect to see very rapid wear the second time around.
I realize you might already know all of this, but I thought I would mention it for others that might be following this thread.
One thing I should mention that perhaps you already know about. Although I have not checked them myself, I would assume the bearing surface on the factory axles (and all aftermarket axles) is hardened either via induction or flame. This is done to prevent rapid wear of the metal. Often times this hardness is only a few thousanths of an inch thick. Usually the wear on an axle consist of grooves as well as a condition known as spalling where small irregular shaped flakes of metal have flaked off. This is from impact loading on the bearing surface. This spalling is actually the hardened metal surface flaking off from the soft core.
Depending on how much metal you had to take off to get rid of the grooves, there may not be a significant thickness of hard material left. If you have access to a hardness meter, you could check them and see. If they are not at least 45 Rockwell C I would expect to see very rapid wear the second time around.
I realize you might already know all of this, but I thought I would mention it for others that might be following this thread.
Thank you guys for your help - I wouldn't be able to finish it without your comments!
