Thread: Rear Differential Markings for 1993 Defender 200tdi

Hello All,

Just wondering if any one knows the story behind the markings at the top of the rear differential that read

50
TUPY
80-19-008
100592

The top line has what looks like a capital D laying with the straight line facing down and arranged horizontally to the left of the '50'

The 100592 is contained within a rectangle shape


Then on the driver's side axle there is a mark on a flat face at the back with the number 2236 arranged vertically.

It would be good to find out what these numbers and letters mean or relate to. Any ideas?

Plus what brand of differential is it?

Kind regards
Lionel

Originally Posted by Lionelgee

I thought the numbers might be like on a Dana differential and indicate the ratios and other information about specifications.

Stamped numbers might provide other info as they would be stamped when the axle/diff assembly is built.

Cast numbers only tell you about the housing which could end up with different length/design axle tubes and diff ratios when assembled.

The Google AI bot gave me this :-
These numbers reveal the axle type (like 21S or 24S for Land Rover), the gear ratio, and sometimes the build date. For example, a ratio might be stamped as "43/14", indicating a 3.07 ratio

Colin