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Old 02-17-2015, 09:30 PM   #1
FASTDIESEL
 
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Zl1/1LE Wheel Bearing Upgrade Questions

May be covered before.... Two questions:

Have a low roaring noise on Mr Freeze. Gets louder when you turn right, quiet down when turning left. Suspect right wheel bearing is taking a dump. Your thoughts?

Are the ZL1/1LE bearing hubs a DIRECT BOLT-IN on the SS cars?

Cheepo replacements are $65, AC/Delco - $125, ZL1 - $132. Seems like a logical time to upgrade.
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Old 02-17-2015, 10:16 PM   #2
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If you upgrade bearing assemblies i believe you have to upgrade axles as well because they come as a whole unit hub and all....
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Old 02-17-2015, 10:17 PM   #3
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If you suspect a wheel bearing then jack the vehicle up so the wheel is off the ground and then try to wiggle the wheel top to bottom. In other words push in on the top and pull out on the bottom. Then alternate this back and forth like you are trying to wiggle the wheel or rock the wheel. If you feel any play at all in the wheel or hear any noise from the wheel "switching" sides inside the bearing then the bearing will need to be replaced.
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Old 02-17-2015, 10:39 PM   #4
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Sorry guys, FRONT wheel bearing. I understand the bearings are bigger on the ZL1/1LE.

Can't feel any wiggle the wheel. Took the wheel off, maybe a little noise when I spin the wheel. Sounds like the pads dragging a little.
Backed the pads off, still a little noise.

Are FRONT hubs a bolt-on?
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Now - Vararam, Mike Norris catch can. 245/50/19 Firestone Wingfoot A/S on LT2 black powder coated rims (square). 1 7/8" Speed-Engineering LTH, off road pipes, tune. LED DRLs w/ connector.
Now 12.93 @ 109.13.
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Old 02-18-2015, 09:10 AM   #5
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Quote:
Originally Posted by olblue75 View Post
If you upgrade bearing assemblies i believe you have to upgrade axles as well because they come as a whole unit hub and all....
No

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Originally Posted by FASTDIESEL View Post

Are FRONT hubs a bolt-on?
Yes, as are the rears.

For the rears the ZL1, 1LE and SS axles have the same size outer spline. The 1LE and SS have the same size inner spline, the ZL1 is different. That's why you can install 1LE axles in an SS. Here's a picture of the outer spline when I swapped mine.
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Old 02-18-2015, 01:55 PM   #6
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Hubs are different between SS an ZL1s-1LEs
http://www.camaro5.com/forums/showthread.php? t=237956&highlight=1LE+Axles&page=4
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Old 02-18-2015, 08:53 PM   #7
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Quote:
Originally Posted by olblue75 View Post
Hubs are different between SS an ZL1s-1LEs
http://www.camaro5.com/forums/showthread.php? t=237956&highlight=1LE+Axles&page=4
I'm not sure exactly what you're getting at. I think we agree the hubs are different, hence the point of upgrading to 1LE/ZL1 hubs on an SS. The bearings are heavier duty on the 1LE/ZL1 hubs. From my personal observations, the outer spline looked to be the same on both the SS and 1LE axle. Granted it is machined differently but if I recall correctly we were able to shove the ZL1 hub over the SS axle spline. It was several years ago when I did the swap, so if I am wrong sorry. Verifying whether it would work was not really on my agenda at the time since I swapping to 1LE axles and ZL1 hubs.

Perhaps someone out there can verify the spline count and diameter of the outer spline between the 1LE and SS axles. I tried to cross reference the hubs to see if later part numbers were interchangeable, but I found so many different superceded part numbers I gave up. One company made a replacement rear hub that apparently worked from 2010-14, so that makes me think I was correct that the outer spline is the same.
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Old 02-18-2015, 09:18 PM   #8
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Hubs

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Originally Posted by bannonm View Post
I'm not sure exactly what you're getting at. I think we agree the hubs are different, hence the point of upgrading to 1LE/ZL1 hubs on an SS. The bearings are heavier duty on the 1LE/ZL1 hubs. From my personal observations, the outer spline looked to be the same on both the SS and 1LE axle. Granted it is machined differently but if I recall correctly we were able to shove the ZL1 hub over the SS axle spline. It was several years ago when I did the swap, so if I am wrong sorry. Verifying whether it would work was not really on my agenda at the time since I swapping to 1LE axles and ZL1 hubs.

Perhaps someone out there can verify the spline count and diameter of the outer spline between the 1LE and SS axles. I tried to cross reference the hubs to see if later part numbers were interchangeable, but I found so many different superceded part numbers I gave up. One company made a replacement rear hub that apparently worked from 2010-14, so that makes me think I was correct that the outer spline is the same.
I was under the impression you had to change the hub/bearing assy to run the 1LE axles an I've done some reading an it seems to contradict itself going both ways. I seem to remember something about the outer stub being a different size. I could be wrong but I could run the heavier part with stock SS axles???
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Old 02-18-2015, 09:41 PM   #9
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Only concerned about the front hubs.

From what I'm reading, the fronts are a direct bolt in.
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Now - Vararam, Mike Norris catch can. 245/50/19 Firestone Wingfoot A/S on LT2 black powder coated rims (square). 1 7/8" Speed-Engineering LTH, off road pipes, tune. LED DRLs w/ connector.
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Old 02-18-2015, 09:49 PM   #10
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An the front 1LE ZL1 bearings are a heavier unit than the stock SS right???
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Old 02-18-2015, 10:59 PM   #11
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That's what I'm hearing. I have one growling at 101K miles. I figure a larger bearing will be better.....

Just want to make sure it's BOLT-ON.......

Thanks to Camaro5, for all the knowledge!
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13.244 @ 104.91 100% stock (#17).
Now - Vararam, Mike Norris catch can. 245/50/19 Firestone Wingfoot A/S on LT2 black powder coated rims (square). 1 7/8" Speed-Engineering LTH, off road pipes, tune. LED DRLs w/ connector.
Now 12.93 @ 109.13.
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Old 02-19-2015, 08:35 AM   #12
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Quote:
Originally Posted by FASTDIESEL View Post
Only concerned about the front hubs.

From what I'm reading, the fronts are a direct bolt in.
Correct

Quote:
Originally Posted by olblue75 View Post
An the front 1LE ZL1 bearings are a heavier unit than the stock SS right???
Yes they are. Only the bearings are beefier. It will bolt right in the spindle on the SS. Just so we are clear, the hub consists of the bearings and wheel studs mounted in the housing. You don't buy these separately.
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Old 02-19-2015, 09:47 AM   #13
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Thanks! Got 'em on order.

TwilightZone wanted $144.00 + tax for the STANDARD hub (+they would have to order them!). Got the ZL1/1LE hubs mail ordered from a Chevy dealer for $135.00, w/ free shipping!

Could have gotten some China knock-offs for $65.00, but I'm not really comfortable with a wheel bearing made in a sweat shop......
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Now - Vararam, Mike Norris catch can. 245/50/19 Firestone Wingfoot A/S on LT2 black powder coated rims (square). 1 7/8" Speed-Engineering LTH, off road pipes, tune. LED DRLs w/ connector.
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Old 02-19-2015, 11:16 AM   #14
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The Z/28 hub is the most robust.

25954415 $419.58
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