charles harbert wrote:

Neil, a machinist friend of mine made the changes, but I understand that Ross is
now installing an identical thrust bearing on his std gbox. What we did was to
machine out a space between the input shaft seal and the sun gear. We used a std
torrington thrust bearing (with  torrington washers on each side), plus a shim
against the sun gear. This was about .400 thick as I recall. You also need to
make room for oil to get into and out of this area.

In addition, we devised a way to take pressurized oil thru small holes into the
planetary gear housing, so that it sprays directly onto the sun gear (4 or 8
spray), so that there is always oil on these gears. We also now use an electric
scavenge pump (plus an independant overflow line) to pump the oil out of the box
which allows us to put in 3 times the oil volume. Both Dave Atkins and I use
this system (plus a few others). We saw significantly lower oil exit temp, and
hope the gears will now survive.

 
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