Big Healey Drivetrain Details

Austin-Healey

Tech Data for 100/6 & 3000, Mk 1 – 2- 3

(information from AUSTIN-HEALEY: OWNERS WORKSHOP MANUAL, by Kenneth Ball, Autopress Ltd. 1973)


Dimensions are in inches unless otherwise stated

“A” refers to the 2639 cc engine with 2 port head
“B” refers to the 2912 cc engine 
“C” refers to the 2639 cc engine with 6 port head


While I have tried to be accurate as possible, it is very likely that there are typos and errors on this page.  Please note that no one associated with austin-healeys.com assumes any liability arising from the information presented here.  If you find a mistake, please let me know from the contact page and I will correct it.


AXLES, HUBS, SUSPENSION, WHEELS, AND BRAKE DETAILS

Rear axle:    
     A and B  Type 3/4 floating
     A   Ratio Standard 3.91:1
     B   3.545:1
     A   With Overdrive 4.1:1
     B   3.909:1
     A and B  Final Drive Hypoid bevel
     A   Teeth on crownwheel and pinion,  
                standard 43/11
     B   39/11
     A   With overdrive 41/10
     B   43/11
     A and B Crownwheel/pinion backlash Marked on crownwheel
     A and B Adjustment Marked on crownwheel Shims
     A and B  Oil capacity 3 pints (1.704 litres)
Rear springs:    
     A and B  Type Semi-elliptic
     A   Number of leaves 7
     B   Mark I, II, and III 7
               Mark III from #26705 6
     A and B  Thickness of leaves 6 at .1875 (4.76 mm)
                 1 at .15625 (4 mm)
     B   MkIII 4 at .1875 (4.8 mm)
                 2 at .15625 (4 mm)
     A and B  Width 1 3/4 (44.5 mm)
     A and B  Deflection 4 ? 1/4 (101.6 mm)
                MkIII 5 1/4 (133.35 mm)
     A and B  Loaded camber 1/2 (12.70 mm) ?1/8
               Mk III 1 (25.4 mm)
     A and B   3 at .03125 (.80 mm)
Steering:    
     A and B  Type Cam gears and peg
     A Ratio   14:01
    15:01
From car BN4 #68960 and BN6 1995    
     A and B  Track toe-in .0625 to .125 (1.58 to 3.17 mm)
     B   Steering lock angle Outer 20 deg.
                 Inner 21 deg.
Suspension:    
     A and B  Front type Coil spring, wishbone
     A and B  Castor angle 2 deg.
     A and B  Camber angle 1 deg.
     A and B  Swivel pin inclination 6 1/4 deg.
     A and B  Rear type Semi-elliptic leaf underslung, Panhard rod
     A and B  Shock absorbers Armstrong lever hydraulic
Brakes    
     A and B  Type Girling hydraulic
     A   Front Two leading shoes
     B   Disc
     A and B  Drum diameter 11 (280 mm)
     B  Disc diameter 11 (285 mm)
     A and B  Shoe lining width 2 1/4 (57 mm)
     A   Shoe lining length 10.4 (265.6 mm)
     B   10.53 (267.4 mm)
     A   Thickness .167 to .174 (4.24 to 4.42 mm)
     B   .187 (4.76 mm)
            Disc pad thickness .40625 (10.32 mm)
     A and B  Pedal free movement .125 (3.175 mm)
     A   Frictional area 188 sq in (1213 sq cm)
     B   Rear 95 sq in
                Disc 4 x 4.25 sq in
                 4 x (10.8 sq cm)
     A and B  Handbrake Mechanical rear wheels
Tyre sizes and pressures;    
     A   5.90 x 15 tubeless
     B   5.90 x 15 road speed (with tubes)
     A and B  Front 20 lb/sq in (1.41 kg/sq cm)
              Rear 25 lb/sq in (1.76 kg/sq cm)
     Maximum performance speeds increase all   
     pressures by   5 lb/sq in (.35 kg/sq cm)
Wheels:    
     A and B   4J x 15 ventilated steel disc or
                 4J x 15 wire (optional)

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