TRANSFER CASE ALUMINUM RANGE FORK CAST # 17833 Vital Parts is offering this NEW transfer case Range Fork for compatible Chevrolet, GM, Jeep & Dodge applications equipped with the below listed New Process Transfer cases. NP 231 * NP 233 * NP 241 * NP 242 * NP 247 * NP 249 * NP 249J, NP 261 This range fork is what controls or engages your high and low while you are in 4wd. Make sure your cast # reads 17833 as there are two different ranges forks possible. If you have a cast # of 16448 that is a different fork that is also available! As always if you are unsure of specific fitment please sent us a message and we would be happy to help!