Guys,
Sorry for not being a more interesting post..

What is the oil I should use for the differential, on my 1939 Lanchester La11

Many thanks

The oil is shown here as SAE140 http://forum.dloc.co.uk/viewtopic.php?f ... oil#p22951
it has to be this type not what you buy as your normal gear oil hypo attacks the bronze causing wear .

Thanks NL,
Just looking on ebay for SAE 140 and spotted this:

https://www.ebay.co.uk/itm/Classic-Gear ... xyBC1SCLmg

I like to support the little guys, so whats the opinion of this oil?

Thanks in advance

GL4 type diff oil is fine, but GL5 will attack bronze and seals.

If your transmission is NON-HYPOID then you need a GL1 spec oil; Penrite Transoil 90 is a good example of GL1 as is Millers Vintage Green Gear Oil 140.

Depends on which viscosity you want to go for. Most owners with a noisy or a slightly worn diff tend to go 140.

I know Pennine Oils and have to say there is better out there - just my opinion and experience.

Regards.

Richard.

Hi, I’ve actually got a mixture of SAE 140 & SAE 250 in my rear Axle, it just helpes reduce noise on the overrun .

Cheers Al

Ps, Actually SAE 140 is specified as standard fro the Rear Axle on LA10
11 etc, etc