never had probs with the r34 6 speed used redline mt90 gear oil...loves the stuff.
even with the cee s short shifter never crunched gears even flat shifting...
car was making 572 rwhp and ran several 10 sec passes...
but the ppg dog box is the go.....for racing...
i use cp pistons and had good results with them in the r32 race car.....
cheers. mark