Silver Cloud I Chassis Info

The chassis number for these models is composed of an initial fixed letter S and a second letter from A to Z. The third letter determines the series of the model. It ends with a series number from 1 to 501.

The chassis number can be found on a plate attached to the engine compartment bulkhead.

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Release Date	Chassis Number	Modification Detail	introduced at Chassis:
Apr 1955 - Jan 1956	SWA2 to SWA250	Modified butterfly valve and countersunk screws SU carburetter	SWA14
Jan 1956 - May 1956	SXA1 to SXA251	Introduction of thick washer under fulcrum bracket bolt lock plate to compensate for distortion of lugs on front pan	SWA14
		Setscrews instead of studs for main bearing caps	SWA24
		Improved sealing between windscreen washer and wiper mounting and body	SWA40
		Steering ball joint castle nuts with increased bearing surface	SWA56
		lncreased friction on brake shakeback stops and increased load on servo return spring	SWA56
		Increased diameter rear engine mounting bolt and modified bracket	SWA62
		Modified bosses to Increase strength of rear axle tube	SWA62
		Improved water and oil mist sealing on servo	SWA62
		Strengthening spring support plate, front suspension	SWA70
		Modified rear loom to cut out brake light on side on which flasher is in operation	SWA72
		Modified flanges on exhaust fittings	SWA126
		Wheel cylinder material changed from aluminium to cast Iron	SWA136
		Stronger clamp for rear anti-roll bar	SWA146
		Filter in brake fluid supply tank	SWA152
		Introduction of aluminium brake master cylinder	SWA162
		Provision of drag links with greater resistance to kinking under compression	SWA168
		Revised type of rear engine mounting	SWA206
		Modified push button and door handle	SXA51
		Increased number of fixing holes in rear axle tube	SXA67
		Folding arm rest in front seats	SXA137
		Steering lever with taper roller bearings in place of bushes	SXA151
		Modified shakeback stop-front and rear brake assemblies	SXA187
		Strengthening front suspension fulcrum bracket	SXA187
Mar 1956 - Jun 1956	SYB2 to SYB250	Modified sealing ring, centre steering operated lever (P.A.S.)	SYB2
Jun 1956 - Sep 1956	SZB1 to SZB251	Dual brake master cylinders	SYB50
		Modified dynamo and voltage regulator	SYB90
		Radiator and drain tap suitable for modified frame	SYB116
		lntroduction of copper petrol pipes	SYB29
		Reach nut and washer to suit new spot facfng of ball and trunnion joint body, output shaft to propeller shaft	SZB35
		Uphill run pipes from twin master cylinders	SZB69
		Welded frame stiffeners on each side of jacking bracket	SZB113
		Revised frame (splayed ends)	SZB139
		Reversal of power cylinder mounting bolt (P.A.S.)	SZB183
Aug 1956 - Oct 1956	SBC2 to SBC150	Increased number of fixing holes in rear axle centre casing	SBC112
Oct 1956 - Apr 1957	SCC1 to SCC151	Voltage regulator wtth swamp resistance (H type)	SCC33
		Introduction of 18.7 steering ratio on left-hand drive cars	SCC69
		Introduction of oil deflector plate for rear shock damper	SCC119
Feb 1957 - May 1957	SDD2 to SDD450	Strengthened front shock damper body - introduction of sleeve in mounting bolt bore	SDD98
Apr 1957 - Aug 1957	SED1 to SED451	Stronger front shock damper casing	SDD350
		Combined inertia and starter ring. modified starter drive and stiffened clutch casing	SED131
Aug 1957 - Jan 1958	SFE1 to SFE501	8:1 compression ratio engine	SFE9
Dec1957 - Jul 1958	SGE2 to SGE500	Modified stub axle yoke seal	SFE23
		Strengthened door hinges	SFE76
		Stronger drag links	SFE109
		DR3 wiper motor	SFE279
		Stronger rear shock damper link bushes	SFE367
		lmproved propeller shaft seal	SGE160
JuI 1958 - Nov 1958	SHF1 to SHF251	Deletion of lubrication pipe on idler lever	SHF1
Oct 1958 - Jan 1959	SJF2 to SJF250	Modified mounting of rear silencer to prevent burning mounting rubber	SHF1
		Improved type rear brake expander wedges	SHF1
		Twin jet centrally mounted windscreen washer	SHF1
		Grease lubricated track rods	SHF1
		Larger diameter rear axle shaft splines	SHF1
		Grease lubricated centre steering	SHF1
		lntermediate heater and de-mister controls	SHF1
		Wire type clips on propeller shaft grease seal	SHF1
		Strengthened front hubs	SHF1
		C48 dynamo	SHF43
		Final scheme strengthened stub axle	SJF122
		Modified door handle with button sealing	SJF140
		Freewheeling boot lock mechanism	SJF168
Jan 1959 - Feb 1959	SKG1 to SKG125	Deletion of check valve in brake fluid supply pipes	SKG1
Feb 1959 - Apr 1959	SLG2 to SLG126	Modified heater and de-mister connections on radiator	SKG119
Mar 1959 - Jun 1959	SMH1 to SMH265	Extended neck on propeller shaft seal	SMH3
May 1959 - Jul 1959	SNH2 to SNH262