[Healeys] When to change transmission oil

[michaelsalter at gmail.com]

Actually I would add that what actually destroys the original gearboxes in Healeys is the hardened steel particles that don't make it to the overdrive filter magnets and circulate within the gearbox. 

These particles are shed by the 1st and reverse gears every time you hear that bgrindb or bcrunchb upon engaging 1st or reverse and make their way through the gearboxes oil circulation system to the layshaft bearings where they cause the rapid failure of the needle roller bearings in there. As these bearings fail they in turn add to the volume of hardened steel particles in circulation thus exuberating the problem. 

It is to this reason that I recommend to all Healey owners that they get into the habit of starting off from a stop in 2nd gear, an easily learned habit, that will enormously prolong the life of the gearbox.

This of sourse does not apply to BN1s with the 1st gear locked out because they effectively have a bfull syncrob box.


Michael S

BN1 #174











From: Bob Spidell
Sent: bSaturdayb, bAprilb b5b, b2014 b10b:b23b bAM
To: healeys at autox.team.net





The issue in gearboxes is ground metal, mostly brass from the shift levers.  I've changed out oil that sparkled in the 
sunlight from ground brass, but did not feel gritty in the slightest (note some greases are made with finely ground 
metals like molybdenum).

You could probably get away with not changing it ever again--just replenishing what leaks out--but I'd change it at 
10yrs/20K miles because, well, just because.

Bob


On 4/5/2014 6:32 AM, Ron Fine wrote:
> I have Redline MT-90 in my transmission (BN7) which was completely rebuilt in
> 2005.  The oil is about 5 years old.  I drive less than 2000 miles a year.
> Transmission runs fine.  Is there a consensus or guide line on how often to
> change the oil?
>
> Thanks,
>
> Ron Fine
> 61BN7
> W.L.A.
>
>
>


-- 
*******************************************************************
Bob Spidell           San Jose, CA            bspidell at comcast.net

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