I understand the 203 and how it originallty worked. i.e. the lock positions lock the differential within the t-case and split the power 50/50 front and rear. Mine has the part time kit, so when it is in 4lo and 4hi, is the diff also locked as it would be before the conversion? my guess is yes. if so, it would seem like the 203 would be a better choice for traction becuase of its differential and the 50/50 split front to rear. the 205, 208, etc. didi not have a diff did they???