A driveshaft assembly including a driveshaft having a first recess proximate a first end, and a second recess proximate a second end. The assembly also includes a first key within the first recess, a second key within the second recess, a first end housing, and a second end housing. The assembly further includes a first thrust bearing seat coaxially disposed within a first receptacle of the first end housing and including a first end, a second end, and a first length L1 measured axially between the second end and the first end, and a second thrust bearing seat coaxially disposed within a second receptacle of the second end housing and including a first end, a second end, and a second length L2 measured axially between the second end and the first end. L1 and L2 are both fixed and L2 is greater than L1.