lightnings and h/d use a ford 9.75 like all newer f-150. the 8.8 is found in explorer (31-spline), mustang, ranger (most are 28-spline except for 02 fx4s and 03-up fx4 lvII which have 31-splines and torsen l/s diffs).The Ford Lightening and Harley-Davidson F-150s use the 8.8 rear end, their supercharged 5.4L engines produce about 500 ft-lbs of torque. The 8.8 ought to hold up behind a 4BT without issue if used in moderation.
CD
explorers used 31 spline 8.8 for years and f150 did through 98 i know maybe later.lightnings and h/d use a ford 9.75 like all newer f-150. the 8.8 is found in explorer (31-spline), mustang, ranger (most are 28-spline except for 02 fx4s and 03-up fx4 lvII which have 31-splines and torsen l/s diffs).