[Miata] Yay! Broke My Differential!

[Keith Tanner]

I'm sure PR has a book time for doing a 1.8 rear end conversion, but I
suspect I could do one in 90 minutes. I know I can do a diff bushing
replacement in 60, but that's without dealing with axles and they can be
ornery. That's also clock time, not necessarily book time.

For autocrossing, an LSD is really nice. If you haven't noticed any problems
with an open diff so far, you could save some money by using a 1.8 open -
but personally I like to have them.

For comparison sake, repairing your broken 1.6 rear with a new ring and
pinion will likely be at least $400 in parts plus another couple of hundred
for labor.

Keith

On 12/1/06, Roy S. Rapoport <rsr at inorganic.org> wrote:
>
> On Fri, Dec 01, 2006 at 04:45:31PM -0700, Keith Tanner wrote:
> > I think Roy has a 1.6.
>
> Not anymore :).  But it depends on your definition -- I suspect that from
> the perspective of the drivetrain, etc, we can still say that I've got a
> 1.6.
>
> > - it would be cheaper to buy another, unbroken, differential than it
> would
> > be to repair the ring gear in yours. Flyin' Miata sells good open 1.6diffs
> > for $100, I'm sure other salvage yards aren't far off that.
> > - to avoid the problem happening again, consider a 1.8 rear end. This is
> an
> > order of magnitude more expensive unless you either get lucky or are
> willing
> > to do a lot of hunting around. Again, FM sells the parts you need to
> install
> > a 1.8 LSD for $1050. An open diff would be cheaper.
>
> Ouch.  Any idea how many hours it'd take to put that kit on my car?
>
> > - should you consider LSD? Maybe. How does the car get used?
>
> Spirited daily driving.  It's not going to be on the track anytime soon --
> it's one of our two daily drivers now.
>
> -roy
>
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