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Re: welding/redrilling rear axle flanges [Re: HemiRick] #2737347
01/28/20 08:40 AM
01/28/20 08:40 AM
Joined: Jan 2008
Posts: 1,206
Minn
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Minn
Welding on heat treated steel is NEVER a good idea. Ask a metallurgist, this has come up before. Even tack welding, which is probably worst than a complete weld.

And because this has come up before, there WILL be those that will tell their stories of how they did it and never had a failure. They just have not waited long enough. Sometimes its a lifetime, sometimes its minutes. Do what you will.

Re: welding/redrilling rear axle flanges [Re: Dave_J] #2737359
01/28/20 09:48 AM
01/28/20 09:48 AM
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Posts: 6,174
nowhere
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Originally Posted by Dave_J
Originally Posted by slantzilla
Originally Posted by 500ciDuster
They did do a bearing change so you couldn't just swap over to the bb axles


Spacing for the brakes is different too.


The 74 Dart Swinger \6 Auto had LBP and 2.94 SG. I kept the axle for my 65 B-cuda that was LBP (using 68 RR 4 piston front and Ford 9 inch rear). I ran that 7.25 for years but had an issue so I built a 8.25 using a truck's 8 3/8's SG and 3.55 gears. I put the 7.25's rear backing plates and 2.5x10 drums on that 8.25 housing. They fit OK.


That's because the brake spacing issues is different with SBP axles. You didn't have one of those.

Re: welding/redrilling rear axle flanges [Re: HemiRick] #2737379
01/28/20 11:18 AM
01/28/20 11:18 AM
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north of coder
moparx Offline
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Originally Posted by HemiRick
Dr. Diff does not sell replacement axles for the the 7 1/4 axle......


i didn't know that.
thank you for the correction.
beer

Re: welding/redrilling rear axle flanges [Re: moparx] #2737644
01/29/20 11:08 AM
01/29/20 11:08 AM
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North Dakota
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North Dakota
The success of weld repairs on any metal is totally dependent on 1) material, 2) process, and 3) post weld treatment. If you know precisely what the original axle characteristics are, then go for it. Otherwise.... If it were me I'd call Dr. Diff and just chat for a while.


"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
Re: welding/redrilling rear axle flanges [Re: 6PakBee] #2737720
01/29/20 01:48 PM
01/29/20 01:48 PM
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Rio Linda, CA
John_Kunkel Offline
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Rio Linda, CA
Much ado about nothing, people have been redrilling axle flanges forever. Filling holes doesn't require welding.


The INTERNET, the MISinformation superhighway
Re: welding/redrilling rear axle flanges [Re: 6PakBee] #2737727
01/29/20 02:06 PM
01/29/20 02:06 PM
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Bitopia
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Originally Posted by 6PakBee
The success of weld repairs on any metal is totally dependent on 1) material, 2) process, and 3) post weld treatment. If you know precisely what the original axle characteristics are, then go for it. Otherwise.... If it were me I'd call Dr. Diff and just chat for a while.


But I am assuming the OP's solution has little symmetry in the suggested process, and even with post weld HT, it is unlikely the he has built in for unaccounted potential stress risers, because of the location, different metals, grain structure, etc. The fact the wheel constantly, in use, loads and unloads the welded area unevenly, is a prime candidate for eventual fatigue induced failure.

The post weld HT is on a one off an educated guess if everyone knows what they are doing.

Regardless, no matter what the OP does, there is IMO, less then a 50% it will fail, but I would not do it.


Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
Re: welding/redrilling rear axle flanges [Re: HemiRick] #2743018
02/14/20 10:36 PM
02/14/20 10:36 PM
Joined: Mar 2003
Posts: 4,848
Memphis
HemiRick Offline OP
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Memphis
I sent the axles off to Moser today, they say they can plug and redrill for $90 ea.

My buddy who was gonna weld em up did some research and found out that warping them was a real risk and his lathe is not set up at the moment, so he took a pass.


Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
Re: welding/redrilling rear axle flanges [Re: HemiRick] #2743026
02/14/20 10:56 PM
02/14/20 10:56 PM
Joined: Aug 2005
Posts: 11,543
chicagoland,usa
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You should be good. About 35 years ago Strange drilled some holes in my stock A body 8 3/4 axles, did not weld any of the extra holes and both held up well on a mid eleven car, so...they put the 1/2-20 screw- in threads in there to save some "meat".

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