I have found both, but not sure which one to buy both are complete ,the d30 has leaf springs and disc brakes, or d44 has drums with coil springs . I want to have disc brakes but I like the d44, It bolts right in. but have to convert to disc brakes for the 5 on 4.5 bolt pattern to use the wheels I have. Im kind of new to this so any info would be helpful!