Originally posted by Thad Garner
Increased mechanical friction. With the 4 gears the car seams to square up quicker out of corners. (You can get back on the throttle sooner) I haven’t used the front diff. 4 gears would work in the front but im not sure of its benefits
We found that the best rear diff combo is…
Loose track- 2 gears with 50,000
High bite track – 4 gears with 30,000
-Thad
Yep I totally agree. Except to add that on my medium grip track even the 4 gear diff felt better with 30K vs the stock 2 gear with 50K.