Both the Triumph and Marina diffs use EP 90 oil with the spec of GL4. However the oil on offer at most outlets is GL5.
There is a difference of opinion as to the suitability of GL5 in older transmissions as it has higher levels of additives that may attack the bronze parts of gearboxes and diffs, especially at higher temperatures.
One part that is bronze and works quite hard in the diff is the thrust shims behind the planet gears. Is this the reason we have had a rash of diff failures recently?
There is a difference of opinion as to the suitability of GL5 in older transmissions as it has higher levels of additives that may attack the bronze parts of gearboxes and diffs, especially at higher temperatures.
One part that is bronze and works quite hard in the diff is the thrust shims behind the planet gears. Is this the reason we have had a rash of diff failures recently?
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