Note: GM TH400 with threaded hole in output shaft is 'Fixed Yoke' transmission and requires a .550" counterbored slip yoke, only available in Sonnax 1350 Chromoly Slip Yoke.
Slip Yoke choices are displayed in 2 categories:
Standard: Slip yokes from Spicer, Neapco and PTI are included in the driveshaft price. (Includes Ford, GM)
Sonnax Chrome Moly (add $80): Forged Chromoly slip yokes are available for popular muscle cars.