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 Which bearing for 3.23 Gu5 axles?

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rauldelp

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Join date : 2015-05-27
Age : 34
Location : Hollywood, Florida, USA

PostSubject: Which bearing for 3.23 Gu5 axles?   Tue Jan 30, 2018 9:07 am

Hi all,

I'm replacing the front wheel bearings (I've got a clunk I'm trying to isolate pretty sure it's in the front as it only happens at low speed and while turning) and decided to look up the rear bearings just in case the clunk is there.

I've got a 1993 Roady with the 3.23 Posi rear. The bearings on Rockauto show as the options "Wagon w/o 3.23" but they don't show the one that will fit!

If one of you has the part no. or the dimensions of the bearing that'd be great. It'd be a shame to have to sideline the car for a week just to pull axles, measure, order bearings, get the wrong ones, measure again, argue with the parts guy, get the right ones then install and drive away.

Here's hoping I don't need them (nor new axles) but I'd like to know what the heck to order.

Thanks!

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Fred Kiehl

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Location : Largo, FL 33774

PostSubject: Re: Which bearing for 3.23 Gu5 axles?   Tue Jan 30, 2018 10:01 am

The 3.23 does not have different bearings than the others. The wagon rear bearings are larger than the sedan, but the front is the same. I believe the RA description is in error. You can get bearings almost anywhere, but stay away from the Chinese ones. Timkin bearings are good.

If the rear axles need bearings, they also need axles, and seals.


Last edited by Fred Kiehl on Tue Jan 30, 2018 4:46 pm; edited 1 time in total
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RedandBlack

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PostSubject: Re: Which bearing for 3.23 Gu5 axles?   Tue Jan 30, 2018 1:28 pm

^ Or saver bearings.
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rauldelp

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PostSubject: Re: Which bearing for 3.23 Gu5 axles?   Tue Jan 30, 2018 6:27 pm

That's a relief! I knew the wagon bearings were larger, but I couldn't fathom GM making another axle/tube for a specific ratio.

Thanks!
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Fred Kiehl

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PostSubject: Re: Which bearing for 3.23 Gu5 axles?   Tue Jan 30, 2018 10:09 pm

If you decide to get new axles, you can get excellent ones from Moser (http://www.moserengineering.com/axles/10-bolt-30-spline-fits-1991-96-impala-w-disc-brakes.html but you must custom order them for the length, and bearing diameter. You can get the bearings from them as well (separate order).
Specs for the Moser custom axle form:
1. TYPE OF REAREND - choose (10 bolt 8.5")
2. BEARING SEAT DIAMETER - choose (1.618")
3. DRIVER SIDE "C" (OVERALL AXLE LENGTH) - fill in (31.8")
3. PASSENGER SIDE "C" (OVERALL AXLE LENGTH) - fill in (31.8")
4. HUB PILOT ("A") fill in (3.060")
5. BOLT CIRCLE - choose (5 X 5" (CHEVY, FORD))
6. STUD TYPE (does not include studs, must order separately) - choose (.505" Knurl Press-In)
7. 2ND BOLT CIRCLE (IF NECESSARY) - choose (none)
8. AXLE FLANGE DIAMETER ("J") - 6 9/16 inch
9. TYPE OF BRAKES/MANUFACTURES PART NUMBER - (drum brakes)
10. TYPE OF DIFFERENTIAL/MANUFACTURE - (auburn limited slip)

-the following fields are optional and I left them blank.
11. AXLE FLANGE TO AXLE FLANGE ("D")
12. HOUSING END TO HOUSING END ("E")
13. DRIVER SIDE HOUSING END TO PINION CENTER ("F") (DO NOT measure through the tubes)
14. PASSENGER SIDE HOUSING END TO PINION CENTER ("G") (DO NOT measure through the tubes)
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RedandBlack

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PostSubject: Re: Which bearing for 3.23 Gu5 axles?   Tue Jan 30, 2018 10:19 pm

Hmmmm interesting. Thanks for those axle specs.
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Sprocket

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PostSubject: Re: Which bearing for 3.23 Gu5 axles?   Wed Jan 31, 2018 8:10 pm

my 2cents:

Even if the axle is scored you probably can still use it. I have replaced bearings on 4 wagons and reused the scored axle with no issues. Mind you they weren't like really deep or anything, but you could feel the ridge.

My experience with saver bearings is they suck. bought one wagon that had one when I bought it, had to replace 25K into ownership and the bearing had 30K on it. The other I bought and it starting leaking after 500 miles. In both cases went back to OE spec bearings and no more worries
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