[Nobbc] Mark's gearbox

[Mark Darley]

Andy,

I am coming up to Petaluma tomorrow to pick up a spare tire from Mike  
Gianandria.  I then have to head back to Mill Valley to trade cars and  
get to the airport to pick up my brother at 3pm. (Leaving Mill Valley  
at 2pm)

I will give you a call in the morning to see if you have time for a  
test drive of my gearbox.  Of course the problem is, it will be hot  
and may not demonstrate the problem.

Wednesday I am taking my guests sailing on Tomales Bay, but Thursday I  
may be able to get to San Rafael with a relatively cold gearbox.

Talk to you tomorrow (Tuesday) AM.

Mark

Mark Darley
markdarley at mac.com
415 381 5452
Cell 310 5252

On Mar 15, 2010, at 6:26 PM, andy preston wrote:

> Mark, I'm in all day tomorrow on Tuesday, and will be driving down  
> to San
> Rafael on Wednesday so perhaps one of those days will work.  I'm  
> also going
> on The Saint Patrick's day tour on Thursday that starts in San  
> Rafael at
> 11:00.
>
> Regarding gearbox oil there are 2 camps, the one says use 30 wt and  
> the
> other recommends 20/50. I had a very sluggish O/D on my B GT which  
> took a
> long time to engage when the engine/gearbox was cold.  I filled the  
> gearbox
> and O/D with ATF and left it in there for over a couple of years and  
> the O/D
> worked fine with the thinner oil.  I replaced it recently with the
> recommended 20/50 and it still works great.  Whatever sludge was in  
> the O/D
> was cleaned out by the ATF.  You could try ATF in your gearbox as a  
> trial
> and see if it makes any difference; it didn't seem to affect the  
> performance
> of the gearbox at all.
>
> Andy
>
> 707 795 3480
>
> -----Original Message-----
> From: nobbc-bounces at autox.team.net [mailto:nobbc-bounces at autox.team.net 
> ] On
> Behalf Of Mark Darley
> Sent: Monday, March 15, 2010 1:46 PM
> To: North Bay British Car Club
> Subject: Re: [Nobbc] Mark's gearbox
>
> Andy,
>
> Do you have any time today, and where are you?
> Give me a all if you are around, as I may come up as far as Petaluma
> around 3pm.
> Mark
> 58 MGA with sticky gearbox!
>
> Mark Darley
> markdarley at mac.com
> Mobile Phone 415 310 5252
>
>
>
> On Mar 9, 2010, at 5:40 PM, andy preston wrote:
>
>> Mark, I started a new thread because your gearbox was getting lost
>> in the
>> tech session one.  I agree with Greg that if your gearbox has done
>> 50,000
>> miles it's just tired, but is probably ok for many more miles
>> before needing
>> a tear down.  I like the idea of changing the oil, that might help
>> a bit.
>> The syncros are probably worn which is why changing up or down is
>> fairly
>> stiff.  Double de-clutching will help going both up and down the
>> box.  I'd
>> try and avoid the 3rd. to 2nd., as much as possible.  Unfortunately
>> there's
>> no magic silver bullet here; the only way to fix it is with a  
>> complete
>> rebuild or another gearbox.  I've done a couple of MGB boxes before
>> and if
>> and when you decide to do it will be pleased to help you.  In the
>> meantime
>> I'd be more than happy to test drive your car and you can drive my
>> early MGB
>> which has the same gearbox except for the rear extension.  I've
>> rebuilt the
>> box on the B so you can also see how a new box feels.  You can also
>> drive
>> the Coupe but that has a Ford Sierra 5 speed which is completely
>> different,
>> and that has a notchy first to second change.
>>
>>
>>
>>
>>
>> Andy
>> _______________________________________________
>> Nobbc mailing list
>> Nobbc at autox.team.net
>> http://autox.team.net/mailman/listinfo/nobbc
> _______________________________________________
> Nobbc mailing list
> Nobbc at autox.team.net
> http://autox.team.net/mailman/listinfo/nobbc
> _______________________________________________
> Nobbc mailing list
> Nobbc at autox.team.net
> http://autox.team.net/mailman/listinfo/nobbc