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Old 01-10-2021, 11:18 AM   #1
rust revival
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Default 39 banjo rear hub pitting?????

Hello fellas I'm at my wits end, what would you suggest besides finding another rearend, I've looked at dozens and this has been the best one I've seen in years (pretty sad but that's Canada). I've read about Rear Axle Repair Sleeves, but I'm not sure if anyone around me could do it, also read it may or may not be safe? Ie failure?
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Last edited by rust revival; 01-10-2021 at 01:25 PM.
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Old 01-10-2021, 11:56 AM   #2
36and63
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Default Re: 39 banjo rear hub pitting?????

I've repaired them with new sleeves and they have worked very well. I had a very qualified machine shop turn them down and I installed the sleeve per the manufacturer instructions. I'm still running them and would do it again.

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Old 01-10-2021, 12:18 PM   #3
skidmarks
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Default Re: 39 banjo rear hub pitting?????

Its not a complicated job, but you need a lathe with a big enough swing to clear the spring hanger.

Becareful who you get the sleave from. The best ones i have found are from the Columbia rear guy that i think is in Tennessee. They require the least amount of material to removed for installation
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Old 01-10-2021, 02:44 PM   #4
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Default Re: 39 banjo rear hub pitting?????

Awesome thanks for the info guys, I'll try to the find the columbia guys contact info
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Old 01-10-2021, 07:35 PM   #5
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Default Re: 39 banjo rear hub pitting?????

Ive just been through it, big task. Lucky I have a good friend with a machine shop.
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Old 01-10-2021, 07:43 PM   #6
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Default Re: 39 banjo rear hub pitting?????

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john connely, columbia two speed was LA, now cottonwood AZ. 951 719 4077. or wwwcolumbiatwospeedparts.com for the good sleeves

Last edited by cas3; 01-10-2021 at 07:44 PM. Reason: add
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Old 01-11-2021, 12:48 AM   #7
JM 35 Sedan
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Default Re: 39 banjo rear hub pitting?????

Third Generation Automotive (Michael Driskell) has those repair sleeves for sale on ebay at a good price. You could probably call him directly and place an order rather than going thru ebay.
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Old 01-11-2021, 09:52 AM   #8
uncle buck
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Default Re: 39 banjo rear hub pitting?????

I had seen a video of cutting the bearing surface down on a brake lathe with the banjo end of the axle tube hanging away from the lathe. Has anybody here done that?

Last edited by uncle buck; 01-17-2021 at 01:14 AM.
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Old 01-11-2021, 10:11 AM   #9
Mart
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Default Re: 39 banjo rear hub pitting?????

I did the job on my lathe. It would not quite swing so I heated and bent the spring hanger and heated and bent it back again afterwards. One way around the lathe size conundrum.
I took a video at the time (poor quality, took on my phone).

https://youtu.be/sk42aYMYKyk

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Old 01-15-2021, 12:42 PM   #10
41calcoup
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Default Re: 39 banjo rear hub pitting?????

Here is another recommendation:
Hot Rod Works
3719 Lake Ave.
Caldwell, Idaho 83605
Phone: 1-208-455-7971
Email: sales@hotrodworks.com
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Old 01-16-2021, 12:07 PM   #11
jimvette59
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Default Re: 39 banjo rear hub pitting?????

I have a question should the area be ground ? Is the surface area hard and would the repair sleeve be hard ?
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Old 01-16-2021, 12:49 PM   #12
skidmarks
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Default Re: 39 banjo rear hub pitting?????

Original surface is pretty tough but carbide does a nice job turning it.
Speed plays a big factor in both rotation and feed so does the angle of the tool bit to the surface.

The repair sleaves are very hard atleast the ones i have used. Im sure someone can tell the exact rockwell rating
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Old 01-17-2021, 08:04 PM   #13
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Default Re: 39 banjo rear hub pitting?????

Quote:
Originally Posted by jimvette59 View Post
I have a question should the area be ground ? Is the surface area hard and would the repair sleeve be hard ?
1. no, just be cut on the lathe.
2. the surface area we found was both hard and soft as the hardening varied in depth on the hub as we cut it.
3. the repair sleeve must be hardened, only get ones you know are USA made.

When we did mine the sleeves we had were very think so we trimmed them down to save more integrity of the hub .
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Old 01-19-2021, 11:54 AM   #14
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Default Re: 39 banjo rear hub pitting?????

Thank you all for the reply's. Has any machinist tried the spray metal system ?
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