Standard vs MSM axles
11-26-2015 | 05:21 PM
#1
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Joined: Jun 2006
Posts: 5,991
Total Cats: 362
From: Athens, Greece
Standard vs MSM axles
Does anyone have any hard data on the actual differences between a 95.5-05 and an MSM axle? I've read in many different posts about the MSM axle being beefier on the inner splines, but what about the rest of the shaft, including the joints?
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11-27-2015 | 04:42 AM
#10
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Joined: Jun 2006
Posts: 5,991
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From: Athens, Greece
They don't "bolt up".
They need an adapter plate or converted bellhousing (I'm using the latter).
You need a modified PPF adapter to get it to line up to the diff correctly, and a shorter driveshaft.
As for the FC diff, I'm looking to keep costs at a minimum, this means that if the MSM axles can handle 500whp, and I get to keep everything else on the car as-is, that's good enough for me.
They need an adapter plate or converted bellhousing (I'm using the latter).
You need a modified PPF adapter to get it to line up to the diff correctly, and a shorter driveshaft.
As for the FC diff, I'm looking to keep costs at a minimum, this means that if the MSM axles can handle 500whp, and I get to keep everything else on the car as-is, that's good enough for me.
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11-29-2015 | 08:20 PM
#12
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Joined: Jul 2005
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From: Anacortes, WA
The mazdaspeed uses a trypoid type inner CV that is much more durable. also has bigger splines going into the Diff and the shafts themselves are bigger diameter. I suspect the mazdaspeed ones would be pretty bullet proof.
At over 300 ft-lbs to the rear wheels and frequently using sticky Hoosier rubber I've managed to twist one standard rear axle in two where it plugs into the outer CV and I consider the Inner CV's a wear Item. After about a year of use the ***** on the inner CV start to create deep divots in the housing I replace them when there starts to be just a huge amount of rotational slop. For the most part I would say the Inner CV's won't handle the load but but the failure mode is usually more like accelerated wear than catastrophic.
At over 300 ft-lbs to the rear wheels and frequently using sticky Hoosier rubber I've managed to twist one standard rear axle in two where it plugs into the outer CV and I consider the Inner CV's a wear Item. After about a year of use the ***** on the inner CV start to create deep divots in the housing I replace them when there starts to be just a huge amount of rotational slop. For the most part I would say the Inner CV's won't handle the load but but the failure mode is usually more like accelerated wear than catastrophic.
Last edited by bbundy; 11-29-2015 at 08:30 PM.
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11-30-2015 | 01:27 AM
#18
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Joined: Jul 2005
Posts: 2,480
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From: Anacortes, WA
They actually work fine if replaced yearly. The only axle I twisted in two already had past the normal replacement window. I keep my eyes pealed for cheap used replacements all the time usually an Ebay Auction. I frequently find the only available source is salvage yards or Ebay. Nobody has new or rebuilds in stock. Mazdaspeed ones are hard to come by and require a different diff and I'm guessing there several pounds heavier.
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