REAR SUSPENSION TR4A WITH IRS AXLE

CAR IDENTIFICATION

When ordering parts, it is essential that you identify your car exactly, by model year and serial number. Since many part changes were made during model years, the commission number, engine number and body number provide the only positive identification. Quite often a car's title will not show the correct model year. Before ordering parts, please record the applicable numbers from your car. Using these numbers is the best way to ensure that you order and receive the correct parts. Wherever possible, we have listed part applications by commission number (e), body number (b) or gearbox (g). For more information on these numbers and years, see the production data below.

Year	Model	Numbers manufactured
		From	To
1953	TR2	TS1 (Aug)	TS302
1954		TS303	TS5192
1955		TS8637 (Sept)	TS9665
1955	TR3	TS8637 (Sept)	TS9665
1956		TS9666	TS14998
1957		TS14999	TS22013 (Sept)
1957	TR3A	TS22014 (Sept)	TS25632
1958		TS25633	TS41629
1959		TS41630	TS65123
1960		TS65124	TS82029
1961		TS82030	TS82346 (Oct)
1961	TR4	CT1 (Aug)	CT2470 (approx.)
	TR3B*	TSF1 (Mar)	TSF530 (Sept)
1962	TR3B*	TCF1	TCF2804 (Oct)
1962	TR4	CT2471 (approx.)	CT18403 (approx.)
1963		CT18404 (approx.)	CT28485 (approx.)
1964		CT28486 (approx.)	CT40000 (approx.)
1965		CT40001 (approx.)	CT40304 (approx.)
1965	TR4A	CTC50001	CTC63736 (approx.)
1966		CTC63737 (approx.)	CTC75000 (approx.)
		CTC75001 (approx.)	CTC78684 (approx.)

*A Note on TR3B's

The TR3B was a very interesting and rare car. Declining sales in the late 50's and early 60's of the TR3 series had led Triumph to carry out a major re-design of the car, which became known as the TR4. It was based on the TR3 running gear but had a Michelotti designed body with wind-up windows and other features designed to improve comfort. The reaction to the TR4 in America was, initially, less than favourable and there was a minor panic back in Coventry where the feeling existed that a mistake had been made in introducing the TR4, and, it was felt essential that the TR3 was 're-introduced'. The car that was re-introduced was the TR3B and in its most basic form the same as the TR3A. There were two series of commission numbers (TSF and TCF), we believe the TSF series was for the 1991cc (83mm) engine and the TCF series for the 2138cc (86mm) engine. Both vehicles were fitted with the later TR4 all-synchromesh gearbox. These are the only distinguishing features that all experts appear to agree on. Unless otherwise specified in the text, all details of the TR3B can be considered to be the same as the post T60001 TR3A.

Location of Serial Numbers

TR2-3B Commission Number

This number is stamped on a plate which is riveted to the righthand bulkhead panel.

TR4-4A Commission Number

This number is stamped on a plate which is riveted to the lefthand bulkhead panel.

TR2-4A Gearbox Number

This number is stamped on the lefthand side of the gearbox casing.

TR2-4A Engine Number

The engine number is stamped on the lefthand side of the cylinder block.

Supersession of Parts

For those of you in possession of original Triumph parts books you may have information which conflicts with that given in the original book. This is usually because the part has been 'superseded' because of some change in specification. For example XKC510 is the lefthand A-post. It used to be 813100 (and the righthand is still 813101), but when the TR6 USA specification cars had an audible buzzer fitted to advise owners that they had opened their door and left the keys in the ignition, it required an extra hole in the A-post to sense the door being opened. Hence 813100 with one hole for a courtesy light becomes XKC510 with two holes. There are many other examples where our Research & Development Department staff find old Austin/Morris saloon car parts that 'will do' to replace 'no longer available' TR parts. These often utilise different part numbers to those shown in the original Triumph parts book.

Model	COMMISSION No.	CHANGES
TR2	TS1	TR2 introduced.
	TS1307	MGA, Frogeye, London Taxi type stop/tail lamps introduced.
	TS4002	Outer sills and 'short door' fitted.
	TS4239	Dzus fasteners replace cables to open bonnet.
	TS6157	Vent lid introduced.
TR3	TS8637	TR3 introduced, 'egg-box' grille fitted.
	TS12568	Windscreen wiper motor moved from righthand to the lefthand side of bulkhead.
	TS13046	Girling hydraulics introduced. TR3 becomes the first mass produced car with disc Brakes fitted as standard.
TR3A	TS22014	Window grille, exterior door handles, different front bumper & overrider design.
	TS28826	Dzus fasteners used on sidescreens.
	TS41878	Colour scheme of front badge changes from red and black to blue and white.
	TS50001	Starter motor changed.
	TS60001	Major body re-design. 'Raised' hinge mounting points, squared rear floor. One piece boot floor fitted. Windscreen stanchions held on by screws in place of Dzus fasteners.
	TS83572	Last TR3A
TR3B	TSF1	TR3B introduced with 1991cc engine and 4 synchro' gearbox.
	TCF1	TR3B introduced with 2138cc engine and 4 synchro' gearbox.
	TCF2804	Last TR3B
TR4	CT1	First TR4 introduced.
	CT6636	Re-designed front suspension with 3* castor.
	CT16801	Stromberg carburettors introduced as mixed fitment.
	CT23383	Deep dish rear springs introduced.
	CT40304	Last TR4 produced.
TR4A	CTC50001	Introduction of the first IRS TR4A, (Solid axle TR4A's Were prefixed 'CT' beginning at CT50001)
	CTC61291	Stromberg carburettors replaced by HS6 SU's.
	CT70000 (approx.)	Cross box silencer introduced
	CT787684	Last of the TR4A rolled of the production line (10th July 1967).

unillustrated articles

Ill.no.	Partno.	Part	Quantity required	Info	Price

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	308267	TRAILING ARM LH	1		availability request (add quantity to basket, offer follows)
1	308268	TRAILING ARM TR6 NCA WAS 66-00 TZ	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
2	138801	PLUG BLANKING 7/8"	4		CHF 7.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
3	138532	PLUG BLANKING, 1 1/8"	4		CHF 3.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
4	137599	BUSH TRAILING ARM, RUBBER	4		CHF 9.60
4	137599SPK	BUSH SET, TRAILING ARM, POLYURETHANE	1	Set - polyurethane - incl. 4 bushes & 4 tubes	CHF 111.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
5	FHS2512	STUD 5/16UNF X 1.5IN	12		CHF 3.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
6	GHF301	WASHER 5/16 X 5/8 M8	12		CHF 0.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
7	GHF272	NUT 5/16UNF NYLOC TN	12		CHF 1.85

Ill.no.	Partno.	Part	Quantity required	Info	Price
8	141399	SUPPORT BRACKET 1 NOTCH	2		CHF 26.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
9	141398	SUPPORT BRACKET OUTER, 2 NOTCH	2		CHF 39.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
10	BH606261	BOLT 3/8 UNF X 3.25	8		CHF 3.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
11	WC600071	WASHER, PLAIN, 7/16" ID X 1" OD	8		CHF 3.00

Ill.no.	Partno.	Part	Quantity required	Info	Price
12	GHF274	NUT 7/16UNF NYLOC THIN	8		CHF 2.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
13	HBZ730	BOLT, 7/16" UNF X 3.3/4"	4		CHF 7.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
14	GHF302	WASHER 3/8 X3/4 OD	4		CHF 0.80

Ill.no.	Partno.	Part	Quantity required	Info	Price
15	GHF274	NUT 7/16UNF NYLOC THIN	4		CHF 2.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
16	139363	SHIM TRACK ARM MOUNTING	a/r		CHF 5.00
16	139363SS	SHIM TRACK ARM MOUNTING STAINLESS	a/r	stainless steel	CHF 7.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
17	216275	ROAD SPRING, REAR, STANDARD RATE, SINGLE	2	standard 350lbs - silicon chrome - pair	CHF 75.05
17			1	uprated 390lbs - silicon chrome - pair

Ill.no.	Partno.	Part	Quantity required	Info	Price
18	138823	COLLAR, SPRING SEATING, REAR, STANDARD, RUBBER	4	standard	CHF 9.25
18	138823SPK	COLLAR SET, SPRING SEAT, REAR, STANDARD, POLYURETHANE	2	polyurethane - pair - standard 7 mm thick	CHF 48.05
18	138823TSPK	COLLAR SET, SPRING SEAT, REAR, THICK +5MM, POLYURETHANE	2	polyurethane - pair - 12 mm thick	CHF 61.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
19	GSA287	SHOCK ABSORBER TR4A-6LH REAR NEW	1	LH, new - standard	CHF 217.25
19	GSA286	SHOCK ABSORBER TR4A-6RH REAR NEW	1	RH, new - standard	CHF 217.25
19	GSA287R	SHOCK ABSORBER RECON LH	1	LH, rebuilt - standard	availability request (add quantity to basket, offer follows)
19	GSA286R	SHOCK ABSORBER RECON TR4A6RH	1	RH, rebuilt - standard	availability request (add quantity to basket, offer follows)
19	TT3214RN	SHOCK ABSORBER, REAR, 25% UPRATED, RH	1	RH, new - setting uprated 25%, road and competition	CHF 246.25
19	TT3214LN	SHOCK ABSORBER, REAR, 25% UPRATED, LH	1	LH, new - setting uprated 25%, road and competition	CHF 246.25
19	TT3215RN	SHOCK ABSORBER, REAR, 50% UPRATED, RH	1	RH, new - setting uprated 50%, full competition only (not suitable for road use)	CHF 246.25
19	TT3215LN	SHOCK ABSORBER, REAR, 50% UPRATED, LH	1	LH, new - setting uprated 50%, full competition only (not suitable for road use)	CHF 246.25

Ill.no.	Partno.	Part	Quantity required	Info	Price
20	SH607101	SCREW 7/16" UNF X 1 1/4"	4		CHF 6.25

Ill.no.	Partno.	Part	Quantity required	Info	Price
21	WB600070	WASHER, PLAIN, 7/16" ID X 7/8" OD	4		CHF 2.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
22	141464A	LINK SHOCK ABSORBER REAR	2		CHF 31.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
23	21A860	BUSH, SHOCK ABSORBER MOUNTING	4	rubber	CHF 4.45
23	21A860SP	POLYURETHANE BUSH, SHOCK ABSORBER MOUNTING	4	polyurethane	CHF 19.00

Ill.no.	Partno.	Part	Quantity required	Info	Price
24	140416	WASHER PLAIN	4		CHF 3.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
25	140479	WASHER REAR DAMPER LINK	2		CHF 3.80

Ill.no.	Partno.	Part	Quantity required	Info	Price
26	GHF202	NUT PLAIN 3/8 UNF	2		CHF 0.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
27	NT605041	NUT 5/16 UNF JAM THIN	2		CHF 1.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
28	GHF203	NUT 7/16 UNF	2		CHF 0.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
29	GHF334	WASHER SPRING 7/16	2		CHF 0.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
30	140290	AXLE BUMP STOP, RUBBER	2		CHF 14.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
31	136758	BUMP STOP RUBBER, REAR	2		CHF 7.25

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	308267	TRAILING ARM LH	1		availability request (add quantity to basket, offer follows)
1	308268	TRAILING ARM TR6 NCA WAS 66-00 TZ	1		availability request (add quantity to basket, offer follows)
2	138801	PLUG BLANKING 7/8"	4		CHF 7.45
3	138532	PLUG BLANKING, 1 1/8"	4		CHF 3.60
4	137599	BUSH TRAILING ARM, RUBBER	4		CHF 9.60
4	137599SPK	BUSH SET, TRAILING ARM, POLYURETHANE	1	Set - polyurethane - incl. 4 bushes & 4 tubes	CHF 111.50
5	FHS2512	STUD 5/16UNF X 1.5IN	12		CHF 3.40
6	GHF301	WASHER 5/16 X 5/8 M8	12		CHF 0.40
7	GHF272	NUT 5/16UNF NYLOC TN	12		CHF 1.85
8	141399	SUPPORT BRACKET 1 NOTCH	2		CHF 26.60
9	141398	SUPPORT BRACKET OUTER, 2 NOTCH	2		CHF 39.60
10	BH606261	BOLT 3/8 UNF X 3.25	8		CHF 3.35
11	WC600071	WASHER, PLAIN, 7/16" ID X 1" OD	8		CHF 3.00
12	GHF274	NUT 7/16UNF NYLOC THIN	8		CHF 2.20
13	HBZ730	BOLT, 7/16" UNF X 3.3/4"	4		CHF 7.45
14	GHF302	WASHER 3/8 X3/4 OD	4		CHF 0.80
15	GHF274	NUT 7/16UNF NYLOC THIN	4		CHF 2.20
16	139363	SHIM TRACK ARM MOUNTING	a/r		CHF 5.00
16	139363SS	SHIM TRACK ARM MOUNTING STAINLESS	a/r	stainless steel	CHF 7.45
17	216275	ROAD SPRING, REAR, STANDARD RATE, SINGLE	2	standard 350lbs - silicon chrome - pair	CHF 75.05
17			1	uprated 390lbs - silicon chrome - pair
18	138823	COLLAR, SPRING SEATING, REAR, STANDARD, RUBBER	4	standard	CHF 9.25
18	138823SPK	COLLAR SET, SPRING SEAT, REAR, STANDARD, POLYURETHANE	2	polyurethane - pair - standard 7 mm thick	CHF 48.05
18	138823TSPK	COLLAR SET, SPRING SEAT, REAR, THICK +5MM, POLYURETHANE	2	polyurethane - pair - 12 mm thick	CHF 61.20
19	GSA287	SHOCK ABSORBER TR4A-6LH REAR NEW	1	LH, new - standard	CHF 217.25
19	GSA286	SHOCK ABSORBER TR4A-6RH REAR NEW	1	RH, new - standard	CHF 217.25
19	GSA287R	SHOCK ABSORBER RECON LH	1	LH, rebuilt - standard	availability request (add quantity to basket, offer follows)
19	GSA286R	SHOCK ABSORBER RECON TR4A6RH	1	RH, rebuilt - standard	availability request (add quantity to basket, offer follows)
19	TT3214RN	SHOCK ABSORBER, REAR, 25% UPRATED, RH	1	RH, new - setting uprated 25%, road and competition	CHF 246.25
19	TT3214LN	SHOCK ABSORBER, REAR, 25% UPRATED, LH	1	LH, new - setting uprated 25%, road and competition	CHF 246.25
19	TT3215RN	SHOCK ABSORBER, REAR, 50% UPRATED, RH	1	RH, new - setting uprated 50%, full competition only (not suitable for road use)	CHF 246.25
19	TT3215LN	SHOCK ABSORBER, REAR, 50% UPRATED, LH	1	LH, new - setting uprated 50%, full competition only (not suitable for road use)	CHF 246.25
20	SH607101	SCREW 7/16" UNF X 1 1/4"	4		CHF 6.25
21	WB600070	WASHER, PLAIN, 7/16" ID X 7/8" OD	4		CHF 2.10
22	141464A	LINK SHOCK ABSORBER REAR	2		CHF 31.95
23	21A860	BUSH, SHOCK ABSORBER MOUNTING	4	rubber	CHF 4.45
23	21A860SP	POLYURETHANE BUSH, SHOCK ABSORBER MOUNTING	4	polyurethane	CHF 19.00
24	140416	WASHER PLAIN	4		CHF 3.30
25	140479	WASHER REAR DAMPER LINK	2		CHF 3.80
26	GHF202	NUT PLAIN 3/8 UNF	2		CHF 0.60
27	NT605041	NUT 5/16 UNF JAM THIN	2		CHF 1.20
28	GHF203	NUT 7/16 UNF	2		CHF 0.75
29	GHF334	WASHER SPRING 7/16	2		CHF 0.45
30	140290	AXLE BUMP STOP, RUBBER	2		CHF 14.35
31	136758	BUMP STOP RUBBER, REAR	2		CHF 7.25

Due to company vacations, orders will be delivered from Monday, January 6st, 2025, thank you for your understanding.

REAR SUSPENSION TR4A WITH IRS AXLE