[Healeys] BN2 transmission rebuild problem

Alan Seigrist healey.nut at gmail.com
Sun Jun 20 13:55:55 MDT 2010

Robert -

The 4 speed Austin box has never, and never will shift anything like a
modern box.  Habitual downshifting is something to be avoided, and if
done should only be done with a careful, slow shift.

I'd rather change brake pads than synchros any day of the week.  It is
what it is.


On 6/20/10, robert bender <rbender1 at berkshire.rr.com> wrote:
> Hey folks, here's the story -
> About 25 years ago, I rebuilt my tranny; bearings, thrustwashers,
> syncros.the works.  Life was good.  Apparently I go some of the lousy
> syncros from Moss.  They went bad in a few thousand miles.
> This year, I decides to fix that problem, and while I was at it, I decided
> to change to a BJ8 clutch.
> Here is the total of what I did:  New syncros (I went with the best I could
> find - bronze from AH Spares), new thrust washers, I fashioned the pad that
> the shift rods bang against in the bellhousing (it's about 1/8 inch thick
> made from Tupperware plastic),  It didn't have one at all before this
> operation.  That's all for the tranny.
> For the clutch:  Resurfaced BJ8 flywheel with new starter ring, BJ8 clutch,
> pressure plate, and throw-out bearing, and a new spigot bushing.  That's it.
> I switched to MT-90.
> Results:  I had to adjust the clutch all the way to the end of the threaded
> rod, but I'm convinced the clutch is fully disengaging.  The clutch is
> smooth as silk.
>                   I go through the gears slowly and I think largely because
> of the MT-90,  it shifts smooth as silk.
>                   I shift through the gears in a more spirited manner or
> downshift without double clutching..not so much like silk.  In fact it was
> better with the old worn syncros!
> Here's the question(s):  Could this grinding be caused because I made the
> pad too thick?
>                                                  Could it be because I
> switched to MT-90?
>                                                  Could I have gotten another
> bad batch of syncros ?  I don't know of a way to install them wrong.
>                                                  Could something else be
> worn that I'm not thinking of?
> Sorry for such a long winded question - any help would be appreciated
> greatly.  I really would like to have an idea of possible causes before
> dragging that thing out again.
> By the way, the overdrive works smooth as silk too, and I have no desire to
> switch to a Toyota tranny.
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