[Healeys] BN2 transmission rebuild problem
healey.nut at gmail.com
Sun Jun 20 13:55:55 MDT 2010
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.
> Healeys at autox.team.net
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