Aston Service Dorset : Aston Martin Lagonda Official Parts Manufacturer and Distributer.

	Pre War Lagonda DB Lagonda + Rapide DB2 + DB2/4 MkI - MkII DB2/4 MkIII DB3S DB4 + DB4 GT DB5 + DB6 DBS + AM Vantage DBSV8 + AMV8 + V8 Lagonda Virage + V8 Vantage DB7

  Transmission

     Clutch (Plate H)
     Gearbox, Gears (Plate J)
     Gearbox, Top Cover (Plate L)
     Rear Axle (Plate N)

  Engine

  Fuel, Cooling + Exhausts

  Suspension + Steering

  Brakes + Pedal Gear

  Electrical + Instruments

  Chassis, Frame, Body, etc.

For all Parts Catalogues, Workshop Manuals and Instruction Books please follow the link to the technical publications page.

A selection of the most frequently asked for Transmission parts are shown below as they appear in the Parts Book (Part Number 90222), anything that is not there, contact us and we will be happy to advise on stock and availability:

The clutch is a 9" single dry plate Borg and Beck with carbon ring thrust pad which is hydraulically operated that requires little or no attention until considerable mileage has been covered, replacements are available as detailed below.

Aston Service Dorset : Clutch Cover Assembly

74840

71976

50286

50283

Cover Assembly

Release Bearing Assembly

Retaining Spring

Driven Plate Assembly

The David Brown four-speed synchromesh gearbox is mounted integrally with the clutch housing and is supported at the rear rubber mounting.

A Laycock de Normanville overdrive unit was an optional extra that could be fitted to the car, a final drive ratio of 4.09:1 was recommend for cars fitted with the overdrive.

One of the following two boxes may be fitted and they are distinguished by the following four letter codes:

DBCC - Close Ratio (Centre change)

DBCW - Wide Ratio (Centre change)

There are a few replacement parts available and the more frequently asked for ones are below:

		51019		Bearing, Ball, Hoffman, Rear

		55963 55912		Oil Seal Rear Oil Seal Front

		55905		Tab Washer

Aston Service Dorset : Gear Lever Retaining Plate Bolt and Spring

56002

56003

Gear Lever Retaining Screw

Gear Lever Retaining Plate Spring

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Power is transmitted to the rear live salisbury axle through an open type Hardy Spicer shaft with both propeller shaft universal couplings being needle roller types.

Availability of parts for the 4HA is good, contact us for further details and prices.

The following is a selection of replacement parts that are available for the 4HA Axle.

		20-26-743 78262 78274 78271		Axle Shaft Bearing, Taper Roller Seal, Oil, Axle Shaft Bearing, Axle Shaft

		56858 78273 119542		Nut, Axle Shaft Key, Axle Shaft Split Pin 5/32"

		77660 77659 71861 113410		Hub Assembly, Rear (Nearside) Hub Assembly, Rear (Offside) Stud, Brake Drum Nut, Self Locking

		55133 20-26-737		Gasket, Gear Carrier Cover Seal, Oil, Pinion Bearing

		20-26-789 78243 58876		Case Assembly, Differential Crown Wheel and Pinion Assembly 3.77:1 ratio Screw, Set, Wheel to Differential Case