Pat's Ebay Turbo Compound Boost Build
#525
SADFab Destructive Testing Engineer
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Wait. It looks like you stripped the hub or something?
Show us disassembled pictures. The outer end of an MSM axle is the same as a non-msm I think. You .might be able to rebuild
Show us disassembled pictures. The outer end of an MSM axle is the same as a non-msm I think. You .might be able to rebuild
#526
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The TL;DR version is that the axles seem to be fine mechanically, but have a high rate of failure as the rebuilders seem to use only a tiny amount of low-quality grease. Thus, you can probably use a reman axle, but before installing it you should dismantle both joints, clean them and the inside of the boots thoroughly until grease-free, and then re-assemble them with a generous quantity of whatever grease your religious preferences tell you is best (eg: Redline CV-2, Amsoil Dominator, or SWEPCO 101.)
And yeah, I'm curious to know what the exact failure mode was here, and whether the hub survived it.
#528
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Waiting to see pics of the disassembled axle and hub.
#529
Mazda SHAFT(R),DRIVE-RR MA03 25 50X at PartsVP.com
#MA032550X: CV Axle Assembly
SHAFT RIGHT (R), DRIVE - REAR (RR). REAR DRIVE SHAFT for 2004 Mazda Miata. #MA032550X
All three of those are cheaper still, and they all let you put them in the cart, so maybe they have them in stock too. Still crazy expensive though.
#MA032550X: CV Axle Assembly
SHAFT RIGHT (R), DRIVE - REAR (RR). REAR DRIVE SHAFT for 2004 Mazda Miata. #MA032550X
All three of those are cheaper still, and they all let you put them in the cart, so maybe they have them in stock too. Still crazy expensive though.
#530
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Will disasemble shortly. Thank you a lot Joe for your help, you just found a PN and link to buy something I couldn't find the last 2 hours.
I'll tear it down and see if it's the same as a regular axle on that part. And see what damage I have.
I'll tear it down and see if it's the same as a regular axle on that part. And see what damage I have.
#532
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I'm sure that any competent driveshaft shop could fabricate an MSM-compatible axle, but it looks like the part that broke on Pat's car is in the vicinity of the hub shaft, and it's unlikely you could meaningfully strengthen this part of the axle while retaining compatibility with the stock hub.
Worst-case, he'd need something like Boss Frog's "Level 3" axle kit, which includes aftermarket hubs, though of course the inner shafts would have to be custom to fit his diff.
Far too early to be bench-spending money until Pat takes the hub apart and figures out what broke.
#534
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Looking at his slips next to what I ran he's got my 11.68 pass covered by .3 sec and 3 mph through the 1/8th.
I wouldn't bet against it dipping into the 10's @ 130 as it sits (minus the exploded axle of course). I can't wait to see what it'll do once all the little issues are ironed out.
I wouldn't bet against it dipping into the 10's @ 130 as it sits (minus the exploded axle of course). I can't wait to see what it'll do once all the little issues are ironed out.
36-38 PSI gets me to 100% duty cycle which is where it makes the most power of course.
Going to tear into it right now. Will post pics when it's apart.
#537
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Did the stub axle break in two? In other words, is the castle nut still threaded onto a piece of the end of the axle, rattling around on the outboard side of the hub?
Or did the nut come off, thus permitting the axle to pull out of the hub?
#539
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That or it broke the threads off the end. Either way the wheel bearing is toast. Hub might be fine, but I also don't think there's enough room for it to come fully out if it's just the threads. Might of stripped just half the splines after the threads broke. That's my bet!
#540
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The inboard cv closest to the diff slung the metal band off, and had grease leaking out of the boot a lot. I don't know if there is damage to the inboard cv.
The outboard cv looks fine. No leaks, no obvious damage.
The stub axle part that goes into the hub had a bad day.
Excuse my ignorance, but Curly mentioned the wheel bearing is done. Why so? That sucks if I gotta replace that too...
Also I grabbed a stock 99 axle, and the outer cv is completely different dimensions. MSM being bigger. So no-go on patching this axle with the old regular axle.