GM 10 Bolt 7.5 & 7.625

1976-1988 26 Spline,1988-Current 28 Spline

26 Spline 3.23 And Up
"PRO SERIES" 26 Spline 3.23 And Up
26 Spline 3.08 And Down
26 Spline 3.08 And Down
28 Spline 3.23 And Up "Accepts ABS Tone Ring"
"PRO SERIES" 28 Spline 3.23 And Up "Accepts ABS Tone Ring"
28 Spline 3.08 And Down "Accepts ABS Tone Ring"
"PRO SERIES" 28 Spline 3.08 And Down "Accepts ABS Tone Ring"

GM 10 Bolt 8.2 BOP & Chevy

1964-1972

"PRO SERIES" Buick,Olds,Pontiac 28 Spline 3.36 And Up "Non C Lock Axle 27 Spline Pinion"
Cheverolet 28 Spline 3.08 And Up "C Lock Axle 25 Spline Pinion"

GM 10 Bolt 8.5/8.6

1971-1988 28 Spline 30 Spline 1989 To Present

28 Spline 2.73 And Up

"PRO SERIES" 30 Spline 2.73 And Up

GM 12 Bolt 8.875 CAR

1965-1972

"PRO SERIES" 30 Spline 3.07 To 3.73
"PRO SERIES" 30 Spline 4.10 And Up

GM 12 Bolt 8.875TRUCK

1964-1982 1/2

"PRO SERIES" 30 Spline 2.76 To 3.42
"PRO SERIES" 30 Spline 3.73 And Up

GM 14 Bolt 9.5

1984 To Present

33 Spline All Ratios

Corvette 1963-79

"PRO SERIES" 17 Spline 2.41 To 3.70
"PRO SERIES" 17 Spline 4.10 And Up