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TRIUMPH SPECIALISTS |
JIGSAW SHOP WINDOW SPARES, REPAIRS, RESTORATIONS, PERFORMANCE AND RACE PREPARATION |
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..a place to locate parts, standard, fast road and performance, for you car
.. recent introductions of new parts
.. a place to find the comprehensive range of services on offer, including:- repairs, restorations, race preparation and Four wheel alignment
LE MANS TRIUMPH SPITFIRE ADU1B .. build, technical info and races we have attended
Race Series with whom we race ADU1B
Updated January 2008 |
Gearboxes, Overdrives, Differentials and Propshafts Small Chassis Triumph
All our gearboxes, overdrives and differentials are clean and ready to fit, and we can supply the gaskets for fitment if requested
These gearboxes, overdrives and differentials are for our standard specification, should you require performance or race specifications please do not hesitate to enquire
Gearbox, fully reconditioned from £ 288.00 Surcharge on gearbox £ 117.50Overdrive unit, fully reconditioned from £ 288.00 Surcharge on overdrive unit £ 117.50
Differential, fully reconditioned from £ 235.00 Surcharge on differential £ 117.50 Fully built, ready to fit, Limited Slip Differential from £ 1300.00 Limited Slip Diff unit only (to be fitted into differential) from £ 660.00 Alloy rear diff casing (4 stud) Spitfire Mk4/1500 GT6 Mk3 £ 190.00 Finned with 0.5litre greater capacity
Crown wheel & pinion, Spitfire, NEW from £ 225.00
Prop shaft, NEW £ 135.00
Gearbox mounting NON overdrive £ 3.00 Overdrive £ 11.75 Differential bushes Rear casing £ 5.00 Mount upper £ 4.60 Mount lower £ 0.60
PROPSHAFT LENGTHS Herald 50” 1.27m Herald with Overdrive (3 rail) 46.5” 1.18m Herald with Overdrive (Single rail) 45.5” 1.16m Vitesse 47” 1.19m Vitesse with Overdrive 43.5” 1.10m Spitfire MkI-IV 41.25” 1.05m Spitfire MkI-IV with Overdrive 38” 0.97m Spitfire 1500 38” 0.97m Spitfire 1500 with Overdrive 37” 0.94m GT6 38.75” 0.99m GT6 with Overdrive 35.25” 0.90m
WHAT DIFFERENTIAL DO I HAVE? There are a number of ways of identifying a differential – wither by counting the crown wheel teeth and dividing by the number of pinion teeth (eg c/w 35 pinion 9 = 35/9 = 8.39), or by counting the number of turns the front flange requires to turn both output flanges through 360 degrees (or one output flange through 720 degrees) – just more than 3 ½ means 3.63, just more than 4 = 4.11
By just looking at a differential you can often narrow down the ratio – for convenience we can split differential units into four types:- § TYPE A – square front pinion flange, 5/16 bolt holes all round (1/2AF spanner size), Small quarter shaft diameter inside, Casing No’s G, Y, FC to 120,000 § TYPE B - square front pinion flange, 5/16 bolt holes all round (1/2AF spanner size), Big quarter shaft diameter inside, Casing No’s GE, FC from 120,001 § TYPE C - square front pinion flange, 5/16 bolt holes all round (1/2AF spanner size), 3/8 bolt holes on output flanges (9/16AF spanner size), Casing No HB § TYPE D – Round front pinion flange, 3/8 bolt holes all round (9/16AF spanner size), Casing No’s FH, FK, FR, FD, HC, KC, KD
Type A & B are indistinguishable from the outside but Type A should not be fitted to Herald 13/60 as the quarter shafts are liable to break. Type C (which was only used for the Vitesse 6 originally) is very prone to quarter shaft failure
Having decided which differential you have you may now want to alter the ratio. The following table gives rounded figures for the miles/kilometers per 1000 rpm
RATIO mph/1000 kph/1000 mph/1000 kph/1000 In Fourth gear In Over drive top 4.875 13.50 21.50 17.00 27.00 4.55 14.50 23.00 18.00 29.00 4.11 16.00 25.50 20.00 32.00 3.89 17.00 27.00 21.00 33.50 3.63 18.00 29.00 22.50 36.00 3.27 20.00 32.00 25.00 40.00
Bigger wheels, non standard tyres etc., will affect the above figures
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BODY - EXTERIOR, INTERIOR AND ACCESSORIES
GEARBOXES, OVERDRIVES, DIFFERENTIALS & PROPSHAFTS TR Range Dolomite Range
to suit the small chassis range of cars - Spitfire, GT6, Herald and Vitesse
(carburettors & manifolds)
(after market additions)
(paint & trim codes, commission numbers etc)
These pages are subject to alteration for pricing and/or product availability. Please check the current details of the item(s) that you require
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