When was the last time you changed your rear hubs?
02-27-2014, 11:43 AM
#161
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Join Date: Oct 2013
Location: Raleigh, NC
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Is the stud you are measuring brand new or has it already been pressed in? The knurling on my dorman studs measured .563-.570 depending on where you measured but it was obviously crushed from being pressed in.
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02-27-2014, 01:41 PM
#163
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--Ian
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03-04-2014, 05:52 PM
#164
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You should have.
It's the hubs that are failing, not the bearings.
So what are people buying that aren't failing? New "redesigned" v8r hubs?
Read the thread an posted before i refreshed to see the one above me.
Edit2*
This is somewhat common, and has happened before on stock hubs, on spec miatas. Here is one for example. Pictures inside:
XceedSpeed
Hub Failure - YouTube
It's the hubs that are failing, not the bearings.
Read the thread an posted before i refreshed to see the one above me.
Edit2*
This is somewhat common, and has happened before on stock hubs, on spec miatas. Here is one for example. Pictures inside:
XceedSpeed
Hub Failure - YouTube
guys, that was my car... and a couple of things worth mentioning...
That was my 1st Spec miata. It had been a spec miata (100% original engine, trans and rear hubs when I bought it in 2007 after being a spec miata since early 2000 and over 38k miles including 2 10 hour enduro races before I ever saw it)
I had 3 left side crashes (1 per year) since owning it and although visually checked the hubs after the crashes, never saw any cracking and didn't think to change the rear hub and bearing (no play so why change what didn't appear broke?)
..so in summary, 3 left rear crashes, over 45k track miles with 89k on the odo probably overdue to change the left rear hub especially after the hits!
I did (just for piece of mind) change the right side hub after the fact so the 'new owner' shortly after this incident got all new hubs and bearings at all 4 corners!
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09-13-2015, 10:46 PM
#169
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Join Date: Apr 2013
Location: toronto
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OEM/new. he's guessing around 30 hours. 400whp/2700lb/NT01's.
Past month I changed out both rears. Halfway through a track day drivers side had developed a hellacious howl. Shop said the hub had cracked 3/4 around the flange and it fell apart during disassembly. Unknown mileage OEM hubs, I put on 60-70 additional hours on them. 200whp/2350lb/all on 200TW rubber except 6X20 min. W2W on SM6's.
Past month I changed out both rears. Halfway through a track day drivers side had developed a hellacious howl. Shop said the hub had cracked 3/4 around the flange and it fell apart during disassembly. Unknown mileage OEM hubs, I put on 60-70 additional hours on them. 200whp/2350lb/all on 200TW rubber except 6X20 min. W2W on SM6's.
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09-15-2015, 09:35 PM
#171
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Wow.
I just ran LRP last week and started getting a high speed vibration that felt worse than just picking up some marbles on the tires. I'll be checking driveshaft, rear end, axles AND HUBS before driving it again. Best case its warped rotors/pad transfer from me throwing new DTC-60's on rotors that are almost to minimum
I just ran LRP last week and started getting a high speed vibration that felt worse than just picking up some marbles on the tires. I'll be checking driveshaft, rear end, axles AND HUBS before driving it again. Best case its warped rotors/pad transfer from me throwing new DTC-60's on rotors that are almost to minimum
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02-21-2016, 08:55 PM
#174
BUUUMMMPPP!!!
Adding my name to the list.
Thank goodness, no video, but I do have pictures:
Both sides had circumfurential cracks all the way around. On the passenger side, the cracking was only evident on the outside. But on the driver's side, cracks had gone all the way through. I honestly have no idea why this didn't launch a wheel -- but I'd rather be lucky . . . .
Adding my name to the list.
Thank goodness, no video, but I do have pictures:
Both sides had circumfurential cracks all the way around. On the passenger side, the cracking was only evident on the outside. But on the driver's side, cracks had gone all the way through. I honestly have no idea why this didn't launch a wheel -- but I'd rather be lucky . . . .
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02-22-2016, 02:28 AM
#176
Both sides had circumfurential cracks all the way around. On the passenger side, the cracking was only evident on the outside. But on the driver's side, cracks had gone all the way through. I honestly have no idea why this didn't launch a wheel -- but I'd rather be lucky . . . .
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02-22-2016, 09:15 AM
#177
Just thought I would add some info on my hubs for the database:
Original to the car Mazda OEM hubs.
92,000 miles on the chassis. 30,000 miles Auto-X/Track. This has been a dedicated Auto-X/HPDE/TT car for a number of years. No W2W. No crashes. Just track duty.
135 RWHP.
2400 pounds with fuel and driver.
949 BGK and R-Comps. Normal cornering G's around 1.2 to 1.3.
Also, in my case the cracks appeared first on the outside surface where it is easy to see once the brake disk is removed. The last time I did this was 1.5 years ago when I reverted back to OEM disks from a first gen Goodwin rear BBK. At that time, the hubs were wire brushed and no cracks were observed. From here on out, I'll be inspecting every time I change rear pads.
Original to the car Mazda OEM hubs.
92,000 miles on the chassis. 30,000 miles Auto-X/Track. This has been a dedicated Auto-X/HPDE/TT car for a number of years. No W2W. No crashes. Just track duty.
135 RWHP.
2400 pounds with fuel and driver.
949 BGK and R-Comps. Normal cornering G's around 1.2 to 1.3.
Also, in my case the cracks appeared first on the outside surface where it is easy to see once the brake disk is removed. The last time I did this was 1.5 years ago when I reverted back to OEM disks from a first gen Goodwin rear BBK. At that time, the hubs were wire brushed and no cracks were observed. From here on out, I'll be inspecting every time I change rear pads.
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02-23-2016, 03:26 PM
#178
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Wow. Good catch. Regular inspections are now on the must-do list.
My 2.0 build is a 180k mile chassis, so new rear hubs are now on the happens-before-first-track-day list.
My 2.0 build is a 180k mile chassis, so new rear hubs are now on the happens-before-first-track-day list.
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