Compatible With : Willys Jeep CJ2A CJ3A CJ5 CJ5 T-90 A3. The Jeep T90 was factory-married only to the Jeep Dana Spicer Model 18 transfer case and only the small input bore versions. The Jeep T90 has a 1-3/8" x 6 spline output shaft for mounting the transfer case input gear.