[TR] J-Type Overdrive oddity

[David Greed]

My apologies for not replying to all the responses earlier - work getting in
the way...

I verified that the lock out switch was OK using a multi meter beep test and
there was no doubt in our minds that it was working properly. A previous
owner has also installed a relay and this works as expected, especially
after replacing the lucar terminals with ones that connected better.

So, I am inclined to think that the oil is the problem. I am also wondering
about the filters but wondering how difficult these are to access on a
J-Type unit. Special tools required?

Regards


DavidG

-----Original Message-----
From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of Dixie4
Sent: Sunday, 9 November 2014 14:47
To: Randall; triumphs at autox.team.net
Subject: Re: [TR] J-Type Overdrive oddity

Hi Randall,

In an earlier post on this thread I said I had a non working overdrive after
a gearbox oil change.
This was in fact on an MGB I owned where I put in SAE 80W90 in error.
Drained and changed to the correct grade of SAE 20W50 and the overdrive
worked again.
I can only speak of a personal experience.

Regards,
Adrian

----- Original Message -----
From: "Randall" <TR3driver at ca.rr.com>
To: <triumphs at autox.team.net>
Sent: Saturday, November 08, 2014 9:57 PM
Subject: Re: [TR] J-Type Overdrive oddity


>> A much renowned small British oil producer and distributor
>> recommended 80W90
>> GL4 gear oil for my TR but recommended 20W50 engine oil for my MGB.
>> Work that one out if you can!
>
> Which overdrives?  They aren't all the same.  The J-type pretty much 
> didn't care, it would run in whatever the gearbox maker
> specified.  Probably work fine with sperm oil! <g>
>
> For the A-type, Laycock always said to use non-detergent motor oil. 
> Standard-Triumph started out saying "whatever", then switched
> to the Laycock recommendation, then around 1960 switched back to only GL4 
> gear oil (GL5 didn't exist back then).  The story as I
> heard it (from an old dealer mechanic who got it from an old factory 
> engineer) was that they felt they had fewer (warranty) failures
> overall using gear oil, even though that was opposite the Laycock 
> recommendation.
>
> But, AFAIK, MGB never had the A-type.  And evidently, their gearbox held 
> up OK with motor oil, so that's what they used.
>
> The important point, I feel, is that neither type of oil is going to cause

> instant overdrive malfunction.  If it doesn't work at
> all, there is something else wrong.  It's possible that using the wrong 
> oil might make it wear out faster, or more apt to break
> thrust washers or whatever; but changing oil isn't going to fix those 
> problems once they have happened.
>
> Randall
>
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