Manual - Chapter 3 Gearbox

Specifications

Gearbox
Reduction ratios - inclusive of output shaft/layshaft reduction of 1.944 : 1 (35/18T)
1st 4.497 : 1
2nd 2.959 : 1
3rd 2.304 : 1
4th 1.879 : 1
5th 1.666 : 1
Layshaft and output shaft standard endfloat 0,050 - 0,150 mm (0.0019 - 0.0059 in)
Input shaft preload:
Tolerance 0,030 - 0.080 mm (0.0012 - 0.0032 in)
Approximate equivalents of preload values, expressed in frition values:
0,030 mm (0.0012 in) preload 0,19 ± 0,02 Nm (0.14 ± 0.01 lbf ft)
0,055 mm (0.0022 in) preload 0,34 ± 0,02 Nm (0.25 ± 0.01 lbf ft)
0,080 mm (0.0032 in) preload 0,50 ± 0,02 Nm (0.37 ± 0.01 lbf ft)
Gearbox lubrication
Recommended oil Good quality hypoid gear oil of API class GL-5 or to specification MIL-L-2105 B or C
Viscosity:
Above 5°C (41°F) SAE 90
Below 5°C (41°F) SAE 80
Alternatively SAE 80W90
Capacity 850 ± 50 cc (1.50 ± 0.09 Imp pint, 0.90 ± 0.05 US qt)
Torque wrench settings
75 models 100 models
Component Nm lbf ft Nm lbf ft
Selector lever/gearchange pedal shaft grub screw 17 ± 2 12.5 ± 1.5 N/Av N/Av
Neutral detent assembly plug 13 ± 2 9.5 ± 1.5 25 - 29 18.5 - 21.5
Front cover retaining screws 9 ± 1 6.5 ± 0.5 9 - 11 6.5 - 8
Gearbox/bellhousing retaining screws 16 ± 1 12.5 ± 0.5 16 ± 1 12.5 ± 0.5
Engine and transmission unit/frame mountings:
Early (1984, 1985) 100 models N/App N/App 32 23.5
Late (1986 on) 100 & 75 models 40,5 ± 4 30 ± 3 40,5 ± 4 30 ± 3
Filler and drain plugs 20 ± 3 15 ± 2 N/Av N/Av

 

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