Selector fork issues

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Mark - 29 Mar 2004 03:31 GMT

Hey folks, I have a little problem, my mini prefers 4th gear over all
others. In fact, it refuses to GO into any other gear. If I ride the
clutch I can start it rolling but the difference between 3rd gear and
4th is negligible, in terms of working out if it is still letting me
go between them.

Odds are it is the 3rd/4th selector rod, I have had it happen before,
with a different motor. Back then I paid to have it fixed and the fix
was to drill into the g/b case and put a new nut on the locating rod.
The guy that did it knew to count a certain number of fins along the
g/b case. Has anyone done this and if so, how many fins is it and from
which end is the count referenced?

Any help much appreciated.
Mark, in chch NZ
PS any local mini buffs in Christchurch(NZ) who want to lend knowledge
to a keen learner, please email my spamtrap account, which I do check.

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fragged - 30 Mar 2004 22:29 GMT

hi
would it not be better to pop the box out and fix it properly ? doesnt take
long and you dont get a sump full of swarf.

Normally a gear selection problem is caused by the clutch being worn,
gearboxes rarely fail and if they do its usually the 1st motion shaft
bearing.

fragged

> Hey folks, I have a little problem, my mini prefers 4th gear over all
> others. In fact, it refuses to GO into any other gear. If I ride the
[quoted text clipped - 13 lines]
> PS any local mini buffs in Christchurch(NZ) who want to lend knowledge
> to a keen learner, please email my spamtrap account, which I do check.

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Mark - 31 Mar 2004 22:28 GMT

No offense but "popping the box out" isn't what I call a short job.
And the clutch is very sound. The motor is not worth spending money
on, I don't want to open it up as that would open a big can of worms.
I want to know how to bore in to fix it. If I select 2nd, the g/b is
locked, it is in two gears at once. It is possible that I can select
3rd or forth, but not neutral. It is stuck on the 3rd/4th selector.

This motor only has to run for another 2-3 months, when I will put a
fast road motor in, I don't want to divert funds away from the 1380
beast, just to keep the 998 crapper running.

Anyone with a schematic, or a link to a schematic of the g/b inner
workings with the casing silhouetted over the top, that would be
fantastic. Either that or someone who has done this patch before.

Thank you to fragged for giving it some thought and anyone else who
responds.

> hi
> would it not be better to pop the box out and fix it properly ? doesnt take
[quoted text clipped - 23 lines]
> > PS any local mini buffs in Christchurch(NZ) who want to lend knowledge
> > to a keen learner, please email my spamtrap account, which I do check.

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k - 01 Apr 2004 00:23 GMT

Hi,,
Just a thought, if you are getting two gears together, it suggests to me
that one of the selector forks has become loose on the selector shaft and is
in a gear engaged position. These are held in place by a screw which threads
through the selector and engages into the shaft. If this is the case, then
the box will have to come out.

Keith

> No offense but "popping the box out" isn't what I call a short job.
> And the clutch is very sound. The motor is not worth spending money
[quoted text clipped - 41 lines]
> > > PS any local mini buffs in Christchurch(NZ) who want to lend knowledge
> > > to a keen learner, please email my spamtrap account, which I do check.

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Mark - 08 Apr 2004 01:16 GMT

> Hi,,
> Just a thought, if you are getting two gears together, it suggests to me
[quoted text clipped - 4 lines]
>
> Keith

That would be the case if you cared about the motor a lot and wanted
to do the job right. The way if you only want the motor for a short
time longer is to bore an inch wide hole in the gearbox casing, refit
a new locknut on the selector fork retaining screw, then block the
hole off with steel putty. I have seen it done on a car previously, I
just don't know where to cut the hole, it is a certain number of
cooling fins along the box. I want to know how many...

> > No offense but "popping the box out" isn't what I call a short job.
> > And the clutch is very sound. The motor is not worth spending money
[quoted text clipped - 44 lines]
> > > > PS any local mini buffs in Christchurch(NZ) who want to lend knowledge
> > > > to a keen learner, please email my spamtrap account, which I do check.

Reply to this Message

k - 08 Apr 2004 12:08 GMT

> > Hi,,
> > Just a thought, if you are getting two gears together, it suggests to me
[quoted text clipped - 11 lines]
> just don't know where to cut the hole, it is a certain number of
> cooling fins along the box. I want to know how many...

Hi,
That I can't help you with. I was never into bodging, being the proprietor
of a well respected Mini centre, But there are probably some posters who
might be able to help.

keith

> > > No offense but "popping the box out" isn't what I call a short job.
> > > And the clutch is very sound. The motor is not worth spending money
[quoted text clipped - 44 lines]
> > > > > PS any local mini buffs in Christchurch(NZ) who want to lend knowledge
> > > > > to a keen learner, please email my spamtrap account, which I do check.

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