[Nobbc] Mark's gearbox

[Ron Engelhardt]

I guess I fall in the 20w/50 camp. I've always used it and the box 
shifts smoooooth as silk.

Ron
58 MGA

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
> 
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