[Mgs] Overdrive Diagram

[Charley Robinson]

Now that you have the relief valve reinstalled correctly, the only other 
variable is the oil.  I suggest you drain the gearbox/OD and refill with 
the same oil you use in the engine.  I've owned two MGBs with OD and 
always used engine oil.  It was Castrol 20-50 until I changed to 
Valvoline racing oil of the same grade after the flat-tappet scare 
started going around.  Never had any trouble with the ODs and I drove 
both cars plenty.

CR

On 1/18/2019 10:32 AM, Jack Wheeler via Mgs wrote:
> Hi Paul.  You are correct, I removed the low pressure valve, NOT the 
> pump assembly.  I was looking at the manual and the parts which came 
> out appeared to be closer to those shown as the pump assembly, but 
> neither was the same as mine. That's how I assumed it was the pump 
> assembly.
>
> So, now that I have the low pressure valve installed properly, the 
> overdrive still does not engage.  The other thing I changed was the 
> gear oil.  I always used straight 50 Wt. motor oil in my overdrives, 
> and that worked fine.  Based on a recent article in the Tech Issue of 
> "MG Driver" magazine, I switched to EP 85/90 GL-4 gear oil.  Do you 
> think this could be causing the problem?
>
> Thanks for your help.
>
> Jack
>
>

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