Workshop Manuals Factory service & repair Alfa Romeo
01 Introduction and contents02 Vehicle characteristics and maintenance03 Engine – mechanical (Twin Spark)04 Fuel system (Twin Spark)05 Ignition, starting and charging (Twin Spark)06 Engine cooling (Twin Spark)07 Engine – mechanical (V6)08 Fuel system (V6)09 Ignition, starting and charging (V6)10 Engine cooling (V6)11 Electrical diagnosis – introduction and wiring diagram guide12 Electrical 01 – Power supply13 Electrical 02 – Fusebox14 Electrical 03 – Location of grounds15 Electrical 04 – Sidelights16 Electrical 05 – Main and dipped beam headlights17 Electrical 06 – Headlight alignment adjustment18 Electrical 07 – Rear and front fog lamps19 Electrical 08 – Direction indicators and hazard warning lights20 Electrical 09 – Stop lights21 Electrical 10 – Reversing lights22 Electrical 11 – Day lights23 Electrical 11A – Dim-dip device24 Electrical 12 – Interior lighting25 Electrical 13 – Instrument panel26 Electrical 14 – Check panel27 Electrical 15 – Provision for radio28 Electrical 15A – Radio system29 Electrical 16 – Cigar lighter30 Electrical 17 – Horns31 Electrical 18 – Windscreen wipers and washers, headlight washers32 Electrical 19 – Heated rear window and heated door mirrors33 Electrical 20 – Boot release control34 Electrical 21 – Door locking system35 Electrical 21A – Remote control door locking36 Electrical 21B – Anti-theft device37 Electrical 22 – Front power windows38 Electrical 22A – Front power windows (one-touch version)39 Electrical 23 – Rear power windows40 Electrical 24 – Adjustable heated seats41 Electrical 25 – Sunroof42 Electrical 26 – Heating, ventilation and air conditioning43 Electrical 27 – Starting and charging44 Electrical 28 – Engine cooling fan45 Electrical 29 – Motronic ignition and injection46 Electrical 29A – Alfa Romeo CODE immobiliser47 Electrical 30 – ABS48 Electrical 31 – Controlled damping suspension49 Electrical diagnosis – components key50 Clutch51 Gearbox and differential52 Axle shafts53 Front suspension54 Brakes55 Steering56 Rear suspension57 Wheels and tyres58 Electrical system59 Instrument panel and electronic instruments60 Bodywork61 Doors62 Boot and bonnet63 Interior trim64 External trim65 Heating and ventilation
Alfa Romeo 155 Factory Service Manual (1992-1998)51 · Gearbox and differential
51 · Transmission

Description

Make
Alfa Romeo
Model
155 Factory Service Manual
Year
1992–1998
Section
Illustrated index › Description
Gearbox and differentialDescription

DESCRIPTION

The gear box is of the transversal "cascade" type with five forward speeds, all synchronized, with perpetually driven gears and a final reduction cylindrical gear pair.

The gearbox is contained in the aluminium casing, whilst the 5th speed gear is contained in the rear cover. The gearbox is connected to the engine through the clutch cone. An oil dipstick, used to check the gearbox oil level (Min-Max), is located on the top of the gearbox on the differential side. To drain the oil, both from the differential side and the gearbox side, there are two drainage holes.

Cross-section diagram of a gearbox with numbered parts
  1. 5th speed drive gear
  2. Speed engagement rod
  3. 4th speed drive gear
  4. 3rd speed drive gear
  5. 2nd speed drive gear
  6. Reverse speed drive gear
  7. 1st speed drive gear
  8. Main shaft
  9. Side pinion
  10. Crown wheel
  11. Constant speed joint
  12. Drive shaft
  13. Odometer idle
  14. Differential casing
  15. Crown gear
  16. Gearbox
  17. Synchronizer
  18. Layshaft
  19. Engagement fork
  20. Rear cover

Parts & tools for this job For 1992 Alfa Romeo 155

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