INTERNAL GEARBOX (4 Synchro) TR3A-4-4A

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
NI	128107UR	LAYGEAR, 16 TOOTH, 1ST & REVERSE, UPRATED	1	bearings, circlips & thrust washer are fitted	CHF 353.45
NI	UKC662UR	LAYGEAR, 17 TOOTH, 1ST & REVERSE, UPRATED	1	bearings, circlips & thrust washer are fitted	CHF 289.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	058956	CIRCLIP, RETAINING, SMALL	1		CHF 2.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
2	060078	WASHER MAINSHAFT SPACER	1		CHF 2.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
3	058391RHP	BEARING, MAINSHAFT CENTRE, 4-SYNCHRO	2	ATTENTION: for the 4-synchro gearbox, it is essential tha these correct RHP bearings are used!	CHF 148.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
4	058955	CIRCLIP, GEARBOX BEARING	2		CHF 13.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
5	060658	CONSTANT PIN OIL THROWER	1		CHF 1.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
7	204214	CONSTANT PINION SHAFT TR4/5 NCA	1		availability request

Ill.no.	Partno.	Part	Quantity required	Info	Price
8	148949	GEAR SET, INPUT SHAFT 4. GEAR	1	input shaft (item 7) and constant mesh gear (item 53)	CHF 354.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
9	145008	CAGED NEEDLE BEARING	1		CHF 17.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
10	208051	MAINSHAFT FOR GEARBOX TR4-6<72 NON O/D	1		availability request

Ill.no.	Partno.	Part	Quantity required	Info	Price
12	113431	USE 113431XK	4
12	113431XK	SYNCHRO RING SUPERIOR QUALITY	4	superior quality	CHF 63.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
13	153844X	SLEEVE FOR 3/4 HUB TR4-6	1		CHF 138.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
14	BLS108	BALLBEARING 1/4 DIA	1		CHF 4.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
15	122075	SPRING, FOR BALL	3		CHF 3.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
18	055707	CIRCLIP, RETAINING 3RD GEAR	1		CHF 13.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
19	157054	WASHER MAINSHAFT	1		CHF 62.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
20	105630	GEAR, 3RD SPEED	1		CHF 204.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
21	129940	USE 153238	1
21	153238	BUSH STEEL 1ST/3RD	1	steel	CHF 45.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
22	129939	BUSH 2ND SPEED, BRASS	1		availability request
22	129939X	BUSH, 2ND GEAR, UPRATED	1	Includes thrust washer 153239	CHF 85.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
23	153239	T/WASHER 2ND GEAR	a/r	0.121" - 0.124"	CHF 60.65
23	153239A	T/WASHER 2ND GEAR	a/r	0.124" - 0.128"	CHF 54.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
24	105629	GEAR 2ND SPEED	1		CHF 251.70
24	152771X	GEAR 2ND UPRATED KIT	1		CHF 249.50

Ill.no.	Partno.	Part	Quantity required	Price
25	129941	WASHER, SPACER 0.118"	1	CHF 21.00
25	129942	WASHER, SPACER 0.121"	a/r	CHF 20.75
25	129943	WASHER, SPACER 0.124"	a/r	CHF 19.25
25	129944	WASHER, SPACER 0.127"	a/r	CHF 20.75
25	134670	THRUST WASHER 0.132"	a/r	CHF 19.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
26	152773	GEAR OUTER 1&2SYNCRO 153843.CWE	1		availability request

Ill.no.	Partno.	Part	Quantity required	Info	Price
27	BLS108	BALLBEARING 1/4 DIA	3		CHF 4.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
28	122075	SPRING, FOR BALL	3		CHF 3.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
31	152770	1ST SPEED GEAR CD20281 ON	1	use with 128107	CHF 75.00
31	152803	1ST SPEED GEAR	1	use with UKC662	availability request

Ill.no.	Partno.	Part	Quantity required	Info	Price
32	129940	USE 153238	1
32	153238	BUSH STEEL 1ST/3RD	1		CHF 45.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
33	116496	WASHER, GEARBOX	1		CHF 72.65

Ill.no.	Partno.	Part	Quantity required	Info	Price
35	059443	WASHER CIRCLIP/BRG G/B MAINSHAFT	1		availability request

Ill.no.	Partno.	Part	Quantity required	Info	Price
36	058956	CIRCLIP, RETAINING, SMALL	1		CHF 2.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
37	058949	WASHER MAINSHAFT REAR	1		availability request

Ill.no.	Partno.	Part	Quantity required	Info	Price
38	SP75G	BEARING, MAINSHAFT, REAR	1		CHF 21.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
40	518109	REAR FLANGE TR2-6 GEARBOX	1		CHF 102.85

Ill.no.	Partno.	Part	Quantity required	Info	Price
41	WP24	WASHER, PLAIN, 3/4" ID X 1.3/8" OD	1		CHF 2.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
42	057868	3/4IN UNF SLOTTED NUT	1		CHF 31.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
43	GHF504	SPLITPIN 1/8 X 2IN	1		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
48	129955	THRUST WASHER, FRONT, LARGE	1		CHF 13.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
49	126862	BEARING, SHELL TYPE	2		CHF 16.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
50	150339	BEARING L/SHAFT CAGED4-6	2	alternative to 126862	CHF 12.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
51	147749	CIRCLIP LAYSHAFT BEARING	2	alternative to 126862	CHF 2.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
52	154396	WASHER	2	alternative to 126862	CHF 17.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
53	142434	CONSTANT PINION GEAR TR6 LATE	1		availability request
53	142434SR	GEAR, COUNTERSHAFT, 4TH, SERVICEABLE REPLACEMENT	1		CHF 91.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
54	059456	DISTANCE PIECE	1		CHF 27.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
55	140509	GEAR, COUNTERSHAFT, 3RD SPEED	1		CHF 134.80

Ill.no.	Partno.	Part	Quantity required	Info	Price
56	140508	GEAR 2ND COUNTERSHAFT	1		CHF 95.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
57	128107	LAYGEAR, 16 TOOTH, 1ST & REVERSE	1	Standard Laygear: use with 152770	CHF 277.70
57	UKC662	LAYGEAR TR6 LATE	1	use with 152803	availability request

Ill.no.	Partno.	Part	Quantity required	Info	Price
58	129956	THRUST WASHER, REAR, SMALL	1		CHF 17.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
59	128105	LAYSHAFT, ORIGINAL	1		CHF 83.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
60	129954	SCREW COUNTERSUNK UNC	1		CHF 6.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
61	129938	LOCK PLATE WASHER	1		CHF 11.80

Ill.no.	Partno.	Part	Quantity required	Info	Price
62	129937	SHAFT REVERSE GEAR	1		CHF 17.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
63	129894	REVERSE OPERATING LEVER	1		availability request

Ill.no.	Partno.	Part	Quantity required	Info	Price
64	106448	PIN, LEVER FULCRUM - REVERSE	1		CHF 21.25

Ill.no.	Partno.	Part	Quantity required	Info	Price
65	WP20X	WASHER, PLAIN, 3/8" ID X 5/8" OD	1		CHF 1.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
66	GHF223	NUT 3/8 UNF NYLOC	1		CHF 0.85

Ill.no.	Partno.	Part	Quantity required	Info	Price
68	128110	REVERSE GEAR	1		CHF 134.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
69	129862	BUSH, REVERSE GEAR	1		CHF 25.70

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	058956	CIRCLIP, RETAINING, SMALL	1		CHF 2.50
2	060078	WASHER MAINSHAFT SPACER	1		CHF 2.10
3	058391RHP	BEARING, MAINSHAFT CENTRE, 4-SYNCHRO	2	ATTENTION: for the 4-synchro gearbox, it is essential tha these correct RHP bearings are used!	CHF 148.05
4	058955	CIRCLIP, GEARBOX BEARING	2		CHF 13.60
5	060658	CONSTANT PIN OIL THROWER	1		CHF 1.90
7	204214	CONSTANT PINION SHAFT TR4/5 NCA	1		availability request
8	148949	GEAR SET, INPUT SHAFT 4. GEAR	1	input shaft (item 7) and constant mesh gear (item 53)	CHF 354.55
9	145008	CAGED NEEDLE BEARING	1		CHF 17.90
10	208051	MAINSHAFT FOR GEARBOX TR4-6<72 NON O/D	1		availability request
12	113431	USE 113431XK	4
12	113431XK	SYNCHRO RING SUPERIOR QUALITY	4	superior quality	CHF 63.90
13	153844X	SLEEVE FOR 3/4 HUB TR4-6	1		CHF 138.20
14	BLS108	BALLBEARING 1/4 DIA	1		CHF 4.60
15	122075	SPRING, FOR BALL	3		CHF 3.75
18	055707	CIRCLIP, RETAINING 3RD GEAR	1		CHF 13.20
19	157054	WASHER MAINSHAFT	1		CHF 62.55
20	105630	GEAR, 3RD SPEED	1		CHF 204.75
21	129940	USE 153238	1
21	153238	BUSH STEEL 1ST/3RD	1	steel	CHF 45.40
22	129939	BUSH 2ND SPEED, BRASS	1		availability request
22	129939X	BUSH, 2ND GEAR, UPRATED	1	Includes thrust washer 153239	CHF 85.10
23	153239	T/WASHER 2ND GEAR	a/r	0.121" - 0.124"	CHF 60.65
23	153239A	T/WASHER 2ND GEAR	a/r	0.124" - 0.128"	CHF 54.90
24	105629	GEAR 2ND SPEED	1		CHF 251.70
24	152771X	GEAR 2ND UPRATED KIT	1		CHF 249.50
25	129941	WASHER, SPACER 0.118"	1		CHF 21.00
25	129942	WASHER, SPACER 0.121"	a/r		CHF 20.75
25	129943	WASHER, SPACER 0.124"	a/r		CHF 19.25
25	129944	WASHER, SPACER 0.127"	a/r		CHF 20.75
25	134670	THRUST WASHER 0.132"	a/r		CHF 19.10
26	152773	GEAR OUTER 1&2SYNCRO 153843.CWE	1		availability request
27	BLS108	BALLBEARING 1/4 DIA	3		CHF 4.60
28	122075	SPRING, FOR BALL	3		CHF 3.75
31	152770	1ST SPEED GEAR CD20281 ON	1	use with 128107	CHF 75.00
31	152803	1ST SPEED GEAR	1	use with UKC662	availability request
32	129940	USE 153238	1
32	153238	BUSH STEEL 1ST/3RD	1		CHF 45.40
33	116496	WASHER, GEARBOX	1		CHF 72.65
35	059443	WASHER CIRCLIP/BRG G/B MAINSHAFT	1		availability request
36	058956	CIRCLIP, RETAINING, SMALL	1		CHF 2.50
37	058949	WASHER MAINSHAFT REAR	1		availability request
38	SP75G	BEARING, MAINSHAFT, REAR	1		CHF 21.95
40	518109	REAR FLANGE TR2-6 GEARBOX	1		CHF 102.85
41	WP24	WASHER, PLAIN, 3/4" ID X 1.3/8" OD	1		CHF 2.05
42	057868	3/4IN UNF SLOTTED NUT	1		CHF 31.60
43	GHF504	SPLITPIN 1/8 X 2IN	1		CHF 0.55
48	129955	THRUST WASHER, FRONT, LARGE	1		CHF 13.95
49	126862	BEARING, SHELL TYPE	2		CHF 16.95
50	150339	BEARING L/SHAFT CAGED4-6	2	alternative to 126862	CHF 12.10
51	147749	CIRCLIP LAYSHAFT BEARING	2	alternative to 126862	CHF 2.10
52	154396	WASHER	2	alternative to 126862	CHF 17.60
53	142434	CONSTANT PINION GEAR TR6 LATE	1		availability request
53	142434SR	GEAR, COUNTERSHAFT, 4TH, SERVICEABLE REPLACEMENT	1		CHF 91.35
54	059456	DISTANCE PIECE	1		CHF 27.60
55	140509	GEAR, COUNTERSHAFT, 3RD SPEED	1		CHF 134.80
56	140508	GEAR 2ND COUNTERSHAFT	1		CHF 95.55
Standard Laygear
57	128107	LAYGEAR, 16 TOOTH, 1ST & REVERSE	1	Standard Laygear: use with 152770	CHF 277.70
57	UKC662	LAYGEAR TR6 LATE	1	use with 152803	availability request
Uprated Laygear Most TR owners know that the Stag, and Police spec saloon gearboxes, were uprated by the modifications to the weak zones of the laygear & shaft, and the replacement of the bimetal thrust washers with needle bearing thrusts. The rear end of the shaft and gearbox became "metric", so this conversion would be quite difficult. Our uprated laygears come complete with 3 bearings and fittings. The twin bearings fitted to the rear end each have twice the load capacity of the original (150339). They fit the standard gearbox and layshaft, so no modifications are required. If your gearbox has suffered such a failure, you will appreciate this is a "fit and forget" solution.
NI	128107UR	LAYGEAR, 16 TOOTH, 1ST & REVERSE, UPRATED	1	bearings, circlips & thrust washer are fitted	CHF 353.45
NI	UKC662UR	LAYGEAR, 17 TOOTH, 1ST & REVERSE, UPRATED	1	bearings, circlips & thrust washer are fitted	CHF 289.45
58	129956	THRUST WASHER, REAR, SMALL	1		CHF 17.50
59	128105	LAYSHAFT, ORIGINAL	1		CHF 83.35
60	129954	SCREW COUNTERSUNK UNC	1		CHF 6.45
61	129938	LOCK PLATE WASHER	1		CHF 11.80
62	129937	SHAFT REVERSE GEAR	1		CHF 17.50
63	129894	REVERSE OPERATING LEVER	1		availability request
64	106448	PIN, LEVER FULCRUM - REVERSE	1		CHF 21.25
65	WP20X	WASHER, PLAIN, 3/8" ID X 5/8" OD	1		CHF 1.10
66	GHF223	NUT 3/8 UNF NYLOC	1		CHF 0.85
68	128110	REVERSE GEAR	1		CHF 134.50
69	129862	BUSH, REVERSE GEAR	1		CHF 25.70

INTERNAL GEARBOX (4 Synchro) TR3A-4-4A

Standard Laygear

Uprated Laygear