Axle Specifications

Spline Count & Outside Diameter At Differential:
58' - 67' - 40 Series Front & Rear - 10 spline (course), 33mm/1.31"
68' - 97' - 40/55/61/62/80 Front & Rear - 30 spline (fine), 33mm/1.31"
98' - 06' - 100 Series Front - 30 spline (fine), 33mm/1.31"

Spline Count & Outside Diameter At Birfield Joint:
58' - 68' - No birf, Ball & Claw Style Joint
68' - 97' - 40/55/61/62/80 - 27 spline

Birfield Joint Renditions:

68 - 9/75 - Course Spline, drum brake, small shell.
9/75 - 1/79 - Fine Spline, disc brake, small shell, longer than later 79-90 birfs.
1/79 - 1/90 - Fine Spline, disc brake, larger shell, shorter than 76-79 birfs.
1/90-97 - Fine Spline, disc brake, largest shell, available with ABS toner ring.

Spline Count & Outside Diameter At Locking Hub/Hub Flange):
58' - 9/75' - 40/55 Series Front & Rear - ? spline (course)
68' - 97' - 40/55/61/62/80 Front & Rear - ? spline (fine)

Steering Arm Bolt Pattern & Shim Dimensions:

Small Pattern (E-1/79' 40/55 Series)
46 mm x 30 mm, 11 mm stud

Large Pattern (1/79'-1/90' 40/55/60/70 Series & 79'-85' PU & 4Runner)
55 mm x 30 mm, 12 mm stud

Knuckle Stud Thread & Pitch Dimensions:

Small Pattern Knuckle
Stud to Knuckle Casting - 11 mm x 1.50
Top thread (Nut Thread) - 11 mm x 1.25

Large Pattern Knuckle
Stud to Knuckle Casting - 12 mm x 1.50
Top thread (Nut Thread) - 12 mm x 1.25

Inner Axle Lengths (without birf attached, measured from end to end):

40/55/70 Series Drivers Side: 29.00"
40/55/70 Series Passenger Side: 17.25"
60/62 Series Drivers Side: 31.5"
60/62 Series Passenger Side: 17.25"
80 Series Drivers Side: 34.125"
80 Series Passenger Side: 17.75"
PU/4Runner (Solid Axle) Drivers Side: 31.5"
PU/4Runner (Solid Axle) Pass. Side: 15.375"

Inner Axle Lengths WITH Birfield Joint Attatched

40/55 68'-9/75' Drum Axle Drivers Side ?
40/55 68'-9/75' Drum Axle Pass. Side ? 40/55 9/75'-1/79' Disc Axle Drivers Side ?
40/55 9/75'-1/79' Disc Axle Pass. Side ? 40/55 1/79'-83' Disc Axle Drivers Side ?
40/55 1/79'-83' Disc Axle Pass. Side ?
60/62 80-1/90' Disc Axle Drivers Side ? 60/62 80-1/90' Disc Axle Pass. Side ? 70 80-1/90' Disc Axle Drivers Side ? 70 80-1/90' Disc Axle Pass. Side ?
80 1/90-97' Disc Axle Drivers Side ? 80 1/90-97' Disc Axle Pass. Side ?
PU/4Runner (Solid Axle) Drivers Side ?
PU/4Runner (Solid Axle) Pass. Side ?

Birfield Joint Lengths (overall length of birfield, end to end)
80 Series W/ABS Tone Ring "Short" style 246 mm80 Series W/ABS Tone Ring "Long" style 251 mm

Front Axle WMS Widths (Wheel Mating Surface to Wheel Mating Surface)
40/55 Series - 55"/57" (will be test measureing in the coming weeks)
PU/4Runner - 55.5"
60/62 Series - 58.5"/60" (will be test measureing in the coming weeks)
80 Series - 63.5"

*See something missing, wrong, or incomplete? Please let us know!