Each TRQ axle is application-specific so each spline and thread will mate properly for a seamless fit. Reference Numbers CARDONE New: 66-3608, 66-3609 CARDONE: 663608, 663609 Dodge: 4743818AB, 4743818AC, 4743819AB, 4743819AC GSP: NCV12108, NCV12109 TrakMotive: CH-8263, CH-8265.