The OEM gears in the Evo transfer cases are fine for stock applications, but are prone to pitting, galling and shearing in high torque applications and particularly in sustained motorsport use. This shows up as the characteristic “death whine”.
Finally, we have a real solution to this problem.
Together with Brena Corse, we can now offer transfer case crown wheel and pinion options that are of unbelievable quality and durability. These are made in Italy on the best machines possible, by a maker who has supplied to Group A factory rally teams, and OEM supplier to Ferrari and Bugatti.
Due to the setup procedures required for the unique Brena gear profile, we are unable to offer the transfer case crown wheel and pinion sets as a stand alone item for sale. They must be installed by us at Neat Gearboxes (Adelaide, South Australia) to ensure correct fitment – you can contact us here.
What you get:
transfer case stripped and inspected
chemical clean components
bead blast housings
new Brena Corse crown wheel and pinion (choices below)
new pinion bearings
new pinion lock nut
new carrier bearings
new seals and O rings
Dimple magnetic drain plug
ACD clutches inspected and pistons pressure tested
assembled to custom specifications to ensure reliable running in extreme applications
700ml NEO RHD 75w90 gear oil (recommended fill for F1, extreme motorsport use)
Evo 4-6; Evo 7-9; and Evo X
Price (in Australian dollars, includes GST – international customers will save 10%):
ISF option $3,590
Isotropic Super-Finishing (ISF) improves surface finish and reduces oil temperatures. An excellent option for a tough street car, or sprint/time-attack where the runs are not especially long (where oil temperatures are not likely to spike). 800Nm capacity.
Carbon Lafer option $3,990
Carbon Lafer leaves a diamond-like carbon deposit on the surface of the gears, leading to incredibly durable gears even in low oil situations and in extreme temperature situations. Cutting edge technology. Recommended for sustained circuit and rally competition use, or where temperatures are very high. 800Nm capacity.
Drag race option $4,090
The drag race spec gears are made of a special steel used extensively in F1. The key advantage is that the teeth will not break with loads up to, and beyond 1000Nm.