Nearly 30 years of obsessively cataloging, photographing, and taking video of each part means it will fit your 1987 Ford Thunderbird Spartan Locker - Ford 8.8" - 31 Spline - Includes Heavy-Duty Cross Pin Shaft - Rear Differential Differential Traction Devices.
Period. No Hassle. GUARANTEED.
We cover round trip shipping if we make a mistake.
Check out the video below to view the Guaranteed Exact Fit process from start to finish!