Volvo portal axles:
Trackwidth = 60.6"
330 lbs for a front axle
286 lbs for a rear axle
8 on 8.75" lug pattern
standard 4 bolt driveshaft flange (Rover size)
Birfield front axle joint (Rover size)
Portal box reduction = 2.06:1
Portal box gears are straight cut
Vertical distance from axle midline to hub midline = 5"
Vaccuum operated locker front/rear, easily converted to cable.
3" square tube stamped steel housing with removable 3rd member
Fronts are pass. drop, can be flipped to make d-side with few mods.
Rear 306 axle is centered, 303 axle is offset 2".
Ground clearance with standard tires(36")/rims(16") = Volvo C-series, 15.5"
factory ratios:
9x33 = 3.666666 (x 2.06 = 7.553333:1)
9x31 = 3.444444 (x 2.06 = 7.095555:1)
11x32 = 2.90909 (x 2.06 = 5.992727:1)
axle specs:
Pinion gear 11 teeth, ring gear 32 teeth.
Portal drive gear 16 teeth, driven gear 33 teeth.
Drive gear 1.5 wide, driven gear 1.4 wide.
Drive axle major diameter 1.16 miner 1.06
Driven axle major diameter 1.745 minor 1.555
27 spline inner axle shafts
26 degree turning angle
Brakes:
11" drum brakes (Rover 109 drum can be turned & drilled to fit: 576974)
Part number front shoes RTC3424 (full set for complete front axle)
Part number rear shoes STC2797 (full set for complete front axle)
Part number wheel cylinder rear right 243296
Part number wheel cylinder rear left 243297
Wilwood sells a disc brake conversion (but it's not cheap)
Portal box bearings:
Small Bearing = TIMKEN JLM104948
Small Race = TIMKEN - JLM104910
Large Bearing = NTN 4T-JLM508748
Large Race = NTN 4T-JLM508710
Inner Oil Seal = STEFA CB 60X85X8
Retaining Nut = V1523031 MUTTER AXEL C3 17B73 (Available at Altyco Parts)
Axle “cover” 1563012-2 (front axle CV boots) can be found at Volvo USA.