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Is it wise to use
additives for the V8 overdrive and back axle?
Should
EP90 oil have additives such as Molyslip, Slick 50 or Wynns added to the gearbox/overdrive
and back axle on the MGBGTV8 was a question in the TechTorque series in Safety
Fast!? The member seeking advice said "advertising and forums I've read state
that they assist with reducing friction, wear and also reduce operating noise
of gearboxes and especially reducing back axle whine". (Dec
12)
Using additives in the lubricant for the combined gearbox
and overdrive unit is not recommended because the friction materials on the
two cones in the
| overdrive
unit need to be able to wipe off any oil traces so the cone can grip. You should
use a medium grade hypoy oil such as Castrol 85W/90 or Duckams Hypoid 90
or a current equivalent which meets the recommended specification MIL-L-2105
and you should not use an additive.
For the back axle the specification
for the recommended lubricant is MIL-L 2105B so a higher performance lubricant
like Castrol Hypoy 90B or Duckams Hypoid 90S or current equivalents is
necessary. Some additives may be useful but you should avoid any additives that
attack bronze because the differential thrust washers are made of bronze. The
bronze baulk rings in the gearbox can also suffer. |
