SU CARBURETTOR HS6

unillustrated articles

Ill.no.	Partno.	Part	Quantity	Info	Price
NI	AUE812A	GASKET SET HS6 CARBURETTORS	1	suitable for all models	CHF 22.55
NI	WZX1391	SUNDRIES KIT, FLOAT CHAMBER SU HS CARBURETTORS	2	suitable for all models	CHF 22.00
NI	WZX1863X	SERVICE KIT FOR 2 CARBURETTOR SU HS6	1	AUD674 carbs	CHF 171.60
NI	CSK91	SERVICE KIT FOR 2 SU HS6 CARBURETTOR	1	FZX1242 & FZX1257 carbs	CHF 237.65
NI	CRK149	REPAIR KIT SU HS6, STANDARD JETS	1	AUD674 carbs	CHF 223.10
NI	CRK282	REPAIR KIT SU HS6 CARBURETTORS WITH WAXSTAT JETS	1	FZX1242 carburettors	CHF 313.95
NI	CRK280	SU REBUILD KIT FOR TWIN HS6 WITH STANDARD JETS	1	FZX1257 carbs	CHF 313.95
NI	GAC6106X	JET CENTERING TOOL	1	special tool	CHF 60.80

Ill.no.	Partno.	Part	Quantity	Info	Price
	AUD634E	CARBURETTORS PAIR HS6 TR7 RECONDITIONED EXCHANGE	1	To (e) CG2715	availability request (add quantity to basket, offer follows)
	FZX1242E	CARBURETTORS PAIR HS6 WAXSTAT RECONDITIONED EXCHANGE	1	From (e) CG2716	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity	Info	Price
2	AUC8103A	DAMPER PISTON & CAP, CARBURETTOR DASH POT	2		CHF 74.35

Ill.no.	Partno.	Part	Quantity	Info	Price
4	AUC4387	SPRING PISTON DAMPER RED, 4 1/2 OZ, 1" DIAMETER	2	1" diameter	CHF 27.45

Ill.no.	Partno.	Part	Quantity	Info	Price
8	JZX1394	SCREW-FLOAT CHAMBER	6		CHF 0.80

Ill.no.	Partno.	Part	Quantity	Info	Price
9	AUD4252	SCREW NEEDLE LOCKING	2		CHF 6.60

Ill.no.	Partno.	Part	Quantity	Info	Price
10	AUD3306	SPRING NEEDLE BIASE	2		CHF 4.10

Ill.no.	Partno.	Part	Quantity	Info	Price
11	NZX8012	NEEDLE BDM	2		CHF 53.75

Ill.no.	Partno.	Part	Quantity	Info	Price
12	AUD4288	GUIDE NEEDLE	2		CHF 17.60

Ill.no.	Partno.	Part	Quantity	Info	Price
20	WZX1011	JET BEARING KIT	2	For AUD634 carburettors	availability request (add quantity to basket, offer follows)
20	WZX1442	JET BEARING KIT, BIAS NEEDLE HS2/HS4 CARBURETTORS	2	For FZX1242 carburettors	CHF 60.95

Ill.no.	Partno.	Part	Quantity	Info	Price
21	AUC8478	WASHER SEALING JET BRG	2		CHF 2.80

Ill.no.	Partno.	Part	Quantity	Info	Price
25	AUD2104	SCREW MAIN JET LEVER	2	For AUD634 carburettors (standard jets)	CHF 1.90

Ill.no.	Partno.	Part	Quantity	Info	Price
26	AUD2427	BRACKET JET TO LEVER FRONT	2	For AUD634 carburettors (standard jets)	availability request (add quantity to basket, offer follows)
26	AUD2428	BRACKET JET TO LEVER REAR	2	For AUD634 carburettors (standard jets)	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity	Info	Price
27	AUD9106	JET ASSY HS6 LH	1	For AUD634 carburettors (standard jets)	CHF 84.15
27	AUD9105A	JET ASSY HS6 RH	1	For AUD634 carburettors (standard jets)	CHF 84.15

Ill.no.	Partno.	Part	Quantity	Info	Price
28	LZX1121A	MAIN JET ASSEMBLY WAXSTAT FRONT	1	For FZX1242 carburettors (waxstat jets)	CHF 123.55
28	LZX1120A	JET ASSEMBLY WAXSTAT REAR	1	For FZX1242 carburettors (waxstat jets)	CHF 127.25
NI	TT1559	JET CONVERSION KIT WAXSTAT TO STANDARD, SU HS6	1		CHF 176.75

Ill.no.	Partno.	Part	Quantity	Info	Price
39	AUC1318	MOUNTING BUSH HS	2	float chamber mounting bolt	CHF 7.70

Ill.no.	Partno.	Part	Quantity	Info	Price
40	WZX1300	FLOAT, CARBURETTOR, PLASTIC	2		CHF 56.05

Ill.no.	Partno.	Part	Quantity	Info	Price
41	AUC8459A	GASKET FLOAT CHAMBER LID	2		CHF 5.10

Ill.no.	Partno.	Part	Quantity	Info	Price
42	WZX1100A	USE WZX1100ABFS	2	includes gasket (no. 41)
42	WZX1100ABFS	NEEDLE & VALVE SEAT KIT	2	includes gasket (no. 41)	CHF 58.90
42	GAC9201X	GROSE JET H/HS/HD CARBURETTOR	2	alternative to 42	CHF 27.30

Ill.no.	Partno.	Part	Quantity	Info	Price
43	AUC1152	PIN FLOAT PIVOT	2		CHF 3.85

Ill.no.	Partno.	Part	Quantity	Info	Price
45	JZX1394	SCREW-FLOAT CHAMBER	6		CHF 0.80

Ill.no.	Partno.	Part	Quantity	Info	Price
46	WL700101	WASHER SPRING 3/16	6		CHF 0.80

Ill.no.	Partno.	Part	Quantity	Info	Price
51	WZX1014	THROTTLE SPINDLE & FITTING KIT	2	For AUD634 carburettors	availability request (add quantity to basket, offer follows)
51	WZX1178	THROTTE SPINDLE & FITTING KIT HS6	2	For FZX1242 carburettors	CHF 52.15

Ill.no.	Partno.	Part	Quantity	Info	Price
52	AUC1358	SCREW BUTTERFLY	1		CHF 4.30

Ill.no.	Partno.	Part	Quantity	Info	Price
53	WZX1386	THROTTLE DISC KIT HS6 CARBURETTORS	2	valve type disc	CHF 104.35
53	WZX1321	THROTTLE DISC KIT, 1 3/4" HS6 CARBURETTORS	2	plain disc	CHF 37.30

Ill.no.	Partno.	Part	Quantity	Info	Price
55	AUC8483	USE AUC3464	2	For AUD634 carburettors
55	AUC3464	SCREW IDLE ADJUSTMENT	2	For AUD634 carburettors	CHF 4.80

Ill.no.	Partno.	Part	Quantity	Info	Price
56	AUC2451	SPRING-SLOW RUN	2	For AUD634 carburettors	CHF 4.30
56	AJD8014Z	NUT 4BA OE	2	For AUD634 carburettors	CHF 0.90


59		SCREW, FAST IDLE ADJUSTMENT	1	no longer available

Ill.no.	Partno.	Part	Quantity	Info	Price
60	AJD8014ZX	SPIRE NUT, SCREW TO THROTTLE LEVER	2	For FZX1242 carburettors	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity	Info	Price
61	JZX1299	SPRING, THROTTLE RETURN, FRONT	1	For FZX1242 carburettors	CHF 14.10
61	JZX1298	SPRING, THROTTLE RETURN, REAR	1	For FZX1242 carburettors	CHF 14.10
NI	WZX1140	THROTTLE LINKAGE SUNDRIES KIT	2	For AUD634 carburettors	CHF 22.55
NI	WZX1156	THROTTLE LINKAGE SUNDRIES KIT	2	For FZX1242 carburettors	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity	Info	Price
63	AUD3323	LOCK TAB T/SPINDLE	2		CHF 2.95

Ill.no.	Partno.	Part	Quantity	Info	Price
64	AUC1424	NUT PIVOT SU CARB	2		CHF 10.80

Ill.no.	Partno.	Part	Quantity	Info	Price
65	AUC8483	USE AUC3464	2	For AUD634 carburettors
65	AUC3464	SCREW IDLE ADJUSTMENT	2	For AUD634 carburettors	CHF 4.80

Ill.no.	Partno.	Part	Quantity	Info	Price
66	AJD8014Z	NUT 4BA OE	2	For AUD634 carburettors - alternative to AUC2451 spring	CHF 0.90
66	AUC2451	SPRING-SLOW RUN	2	For AUD634 carburettors - alternative to AJD8014Z	CHF 4.30

Ill.no.	Partno.	Part	Quantity	Info	Price
67	JZX1180	SCREW IDLE ADJUSTING AND THROTTLE STOP	2	For FZX1242 carburettors	CHF 5.45

Ill.no.	Partno.	Part	Quantity	Info	Price
68	AUD3586	SEALING RING	2	For FZX1242 carburettors	CHF 2.60

Ill.no.	Partno.	Part	Quantity	Info	Price
70	WZX1335	SPRING KIT CHOKE CAM FRONT	1	For AUD634 carburettors	CHF 23.20
70	WZX1336	SPRING KIT CHOKE CAM REAR	1	For AUD634 carburettors	CHF 23.20

Ill.no.	Partno.	Part	Quantity	Info	Price
70	WZX1335	SPRING KIT CHOKE CAM FRONT	1	For AUD634 carburettors	CHF 23.20
70	WZX1336	SPRING KIT CHOKE CAM REAR	1	For AUD634 carburettors	CHF 23.20

Ill.no.	Partno.	Part	Quantity	Info	Price
73	WZX1339	CHOKE SPRING KIT, FRONT, WAXSTAT JET	1	For FZX1242 carburettors	CHF 19.10
73	WZX1338	CHOKE SPRING KIT, REAR, WAXSTAT JET	1	For FZX1242 carburettors	CHF 17.35

Ill.no.	Partno.	Part	Quantity	Info	Price
73	WZX1339	CHOKE SPRING KIT, FRONT, WAXSTAT JET	1	For FZX1242 carburettors	CHF 19.10
73	WZX1338	CHOKE SPRING KIT, REAR, WAXSTAT JET	1	For FZX1242 carburettors	CHF 17.35

Ill.no.	Partno.	Part	Quantity	Info	Price
76	JZX1259	RETAINING CLIP	2	For FZX1242 carburettors	CHF 2.15

Ill.no.	Partno.	Part	Quantity	Info	Price
77	WZX1331	BOLT SET, PIVOT	2		CHF 34.65

Ill.no.	Partno.	Part	Quantity	Info	Price
82	AUE34	PIN ASSY-CHOKE CABLE	1		CHF 6.15

Ill.no.	Partno.	Part	Quantity	Info	Price
85	158712	USE 112892	2
85	112892	GASKET, AIR CLEANER TO CARBURETTOR	2		CHF 3.35

Ill.no.	Partno.	Part	Quantity	Info	Price
86	159871	GASKET - CARBURETTOR TO LINK PLATE	2		CHF 1.80

Ill.no.	Partno.	Part	Quantity	Info	Price
87	GHF201	NUT 5/16 UNF	8		CHF 0.85

Ill.no.	Partno.	Part	Quantity	Info	Price
88	GHF332	WASHER SPRING 5/16	8		CHF 0.40

Ill.no.	Partno.	Part	Quantity	Info	Price
89	GHF301	WASHER 5/16"ID X 5/8"OD	8		CHF 0.90

Ill.no.	Partno.	Part	Quantity	Info	Price
90			1	To (e) CG42
90	UKC6221	USE UKC6848	1	From (e) CG43 On
90	UKC6848	LINK ROD & LEVER, THROTTLE	1	From (e) CG43 On	CHF 18.80

Ill.no.	Partno.	Part	Quantity	Info	Price
91	AUE584	USE TT9912	1	For AUD634 carburettors
91	TT9912	ROD 5/16 X 17IN	1	For AUD634 carburettors	CHF 13.50
91	WZX1581	LINK ROD CARBURETTOR TO CARBURETTOR SU HS6	1	For FZX1242 carburettors	CHF 56.65

Ill.no.	Partno.	Part	Quantity	Info	Price
92	AUE586	LEVER LOST MOTION	2		CHF 4.50

Ill.no.	Partno.	Part	Quantity	Info	Price
93	AUE587	LEVER LH	2		CHF 4.50

Ill.no.	Partno.	Part	Quantity	Info	Price
	AUD634E	CARBURETTORS PAIR HS6 TR7 RECONDITIONED EXCHANGE	1	To (e) CG2715	availability request (add quantity to basket, offer follows)
	FZX1242E	CARBURETTORS PAIR HS6 WAXSTAT RECONDITIONED EXCHANGE	1	From (e) CG2716	availability request (add quantity to basket, offer follows)
2	AUC8103A	DAMPER PISTON & CAP, CARBURETTOR DASH POT	2		CHF 74.35
4	AUC4387	SPRING PISTON DAMPER RED, 4 1/2 OZ, 1" DIAMETER	2	1" diameter	CHF 27.45
8	JZX1394	SCREW-FLOAT CHAMBER	6		CHF 0.80
9	AUD4252	SCREW NEEDLE LOCKING	2		CHF 6.60
10	AUD3306	SPRING NEEDLE BIASE	2		CHF 4.10
11	NZX8012	NEEDLE BDM	2		CHF 53.75
12	AUD4288	GUIDE NEEDLE	2		CHF 17.60
20	WZX1011	JET BEARING KIT	2	For AUD634 carburettors	availability request (add quantity to basket, offer follows)
20	WZX1442	JET BEARING KIT, BIAS NEEDLE HS2/HS4 CARBURETTORS	2	For FZX1242 carburettors	CHF 60.95
21	AUC8478	WASHER SEALING JET BRG	2		CHF 2.80
25	AUD2104	SCREW MAIN JET LEVER	2	For AUD634 carburettors (standard jets)	CHF 1.90
26	AUD2427	BRACKET JET TO LEVER FRONT	2	For AUD634 carburettors (standard jets)	availability request (add quantity to basket, offer follows)
26	AUD2428	BRACKET JET TO LEVER REAR	2	For AUD634 carburettors (standard jets)	availability request (add quantity to basket, offer follows)
27	AUD9106	JET ASSY HS6 LH	1	For AUD634 carburettors (standard jets)	CHF 84.15
27	AUD9105A	JET ASSY HS6 RH	1	For AUD634 carburettors (standard jets)	CHF 84.15
28	LZX1121A	MAIN JET ASSEMBLY WAXSTAT FRONT	1	For FZX1242 carburettors (waxstat jets)	CHF 123.55
28	LZX1120A	JET ASSEMBLY WAXSTAT REAR	1	For FZX1242 carburettors (waxstat jets)	CHF 127.25
NI	TT1559	JET CONVERSION KIT WAXSTAT TO STANDARD, SU HS6	1		CHF 176.75
39	AUC1318	MOUNTING BUSH HS	2	float chamber mounting bolt	CHF 7.70
40	WZX1300	FLOAT, CARBURETTOR, PLASTIC	2		CHF 56.05
41	AUC8459A	GASKET FLOAT CHAMBER LID	2		CHF 5.10
42	WZX1100A	USE WZX1100ABFS	2	includes gasket (no. 41)
42	WZX1100ABFS	NEEDLE & VALVE SEAT KIT	2	includes gasket (no. 41)	CHF 58.90
42	GAC9201X	GROSE JET H/HS/HD CARBURETTOR	2	alternative to 42	CHF 27.30
43	AUC1152	PIN FLOAT PIVOT	2		CHF 3.85
45	JZX1394	SCREW-FLOAT CHAMBER	6		CHF 0.80
46	WL700101	WASHER SPRING 3/16	6		CHF 0.80
51	WZX1014	THROTTLE SPINDLE & FITTING KIT	2	For AUD634 carburettors	availability request (add quantity to basket, offer follows)
51	WZX1178	THROTTE SPINDLE & FITTING KIT HS6	2	For FZX1242 carburettors	CHF 52.15
52	AUC1358	SCREW BUTTERFLY	1		CHF 4.30
53	WZX1386	THROTTLE DISC KIT HS6 CARBURETTORS	2	valve type disc	CHF 104.35
53	WZX1321	THROTTLE DISC KIT, 1 3/4" HS6 CARBURETTORS	2	plain disc	CHF 37.30
55	AUC8483	USE AUC3464	2	For AUD634 carburettors
55	AUC3464	SCREW IDLE ADJUSTMENT	2	For AUD634 carburettors	CHF 4.80
56	AUC2451	SPRING-SLOW RUN	2	For AUD634 carburettors	CHF 4.30
56	AJD8014Z	NUT 4BA OE	2	For AUD634 carburettors	CHF 0.90

59		SCREW, FAST IDLE ADJUSTMENT	1	no longer available
60	AJD8014ZX	SPIRE NUT, SCREW TO THROTTLE LEVER	2	For FZX1242 carburettors	availability request (add quantity to basket, offer follows)
61	JZX1299	SPRING, THROTTLE RETURN, FRONT	1	For FZX1242 carburettors	CHF 14.10
61	JZX1298	SPRING, THROTTLE RETURN, REAR	1	For FZX1242 carburettors	CHF 14.10
NI	WZX1140	THROTTLE LINKAGE SUNDRIES KIT	2	For AUD634 carburettors	CHF 22.55
NI	WZX1156	THROTTLE LINKAGE SUNDRIES KIT	2	For FZX1242 carburettors	availability request (add quantity to basket, offer follows)
63	AUD3323	LOCK TAB T/SPINDLE	2		CHF 2.95
64	AUC1424	NUT PIVOT SU CARB	2		CHF 10.80
65	AUC8483	USE AUC3464	2	For AUD634 carburettors
65	AUC3464	SCREW IDLE ADJUSTMENT	2	For AUD634 carburettors	CHF 4.80
66	AJD8014Z	NUT 4BA OE	2	For AUD634 carburettors - alternative to AUC2451 spring	CHF 0.90
66	AUC2451	SPRING-SLOW RUN	2	For AUD634 carburettors - alternative to AJD8014Z	CHF 4.30
67	JZX1180	SCREW IDLE ADJUSTING AND THROTTLE STOP	2	For FZX1242 carburettors	CHF 5.45
68	AUD3586	SEALING RING	2	For FZX1242 carburettors	CHF 2.60
70	WZX1335	SPRING KIT CHOKE CAM FRONT	1	For AUD634 carburettors	CHF 23.20
70	WZX1336	SPRING KIT CHOKE CAM REAR	1	For AUD634 carburettors	CHF 23.20
73	WZX1339	CHOKE SPRING KIT, FRONT, WAXSTAT JET	1	For FZX1242 carburettors	CHF 19.10
73	WZX1338	CHOKE SPRING KIT, REAR, WAXSTAT JET	1	For FZX1242 carburettors	CHF 17.35
76	JZX1259	RETAINING CLIP	2	For FZX1242 carburettors	CHF 2.15
77	WZX1331	BOLT SET, PIVOT	2		CHF 34.65
82	AUE34	PIN ASSY-CHOKE CABLE	1		CHF 6.15
85	158712	USE 112892	2
85	112892	GASKET, AIR CLEANER TO CARBURETTOR	2		CHF 3.35
86	159871	GASKET - CARBURETTOR TO LINK PLATE	2		CHF 1.80
87	GHF201	NUT 5/16 UNF	8		CHF 0.85
88	GHF332	WASHER SPRING 5/16	8		CHF 0.40
89	GHF301	WASHER 5/16"ID X 5/8"OD	8		CHF 0.90
90			1	To (e) CG42
90	UKC6221	USE UKC6848	1	From (e) CG43 On
90	UKC6848	LINK ROD & LEVER, THROTTLE	1	From (e) CG43 On	CHF 18.80
91	AUE584	USE TT9912	1	For AUD634 carburettors
91	TT9912	ROD 5/16 X 17IN	1	For AUD634 carburettors	CHF 13.50
91	WZX1581	LINK ROD CARBURETTOR TO CARBURETTOR SU HS6	1	For FZX1242 carburettors	CHF 56.65
92	AUE586	LEVER LOST MOTION	2		CHF 4.50
93	AUE587	LEVER LH	2		CHF 4.50
NI	AUE812A	GASKET SET HS6 CARBURETTORS	1	suitable for all models	CHF 22.55
NI	WZX1391	SUNDRIES KIT, FLOAT CHAMBER SU HS CARBURETTORS	2	suitable for all models	CHF 22.00
NI	WZX1863X	SERVICE KIT FOR 2 CARBURETTOR SU HS6	1	AUD674 carbs	CHF 171.60
NI	CSK91	SERVICE KIT FOR 2 SU HS6 CARBURETTOR	1	FZX1242 & FZX1257 carbs	CHF 237.65
NI	CRK149	REPAIR KIT SU HS6, STANDARD JETS	1	AUD674 carbs	CHF 223.10
NI	CRK282	REPAIR KIT SU HS6 CARBURETTORS WITH WAXSTAT JETS	1	FZX1242 carburettors	CHF 313.95
NI	CRK280	SU REBUILD KIT FOR TWIN HS6 WITH STANDARD JETS	1	FZX1257 carbs	CHF 313.95
NI	GAC6106X	JET CENTERING TOOL	1	special tool	CHF 60.80

Commission Number	The commission number is located on the right hand front strut mounting. (USA cars used a different range of commission numbers)
ACG1	- and future to 1978
TCG100001	- 200000, 1979 only
VIN200001	- 402000, 1980 only
VIN402001	- onwards, 1981 and future

Body Number	The body number is located on the front panel above and to the left of the radiator cooling fan.
T1CG	- onwards
1CG	- onwards

Engine Number	The engine number is located at the top of the cylinder block on the right hand side. (Engines for USA, Canada, Australia & Japan used different engine number prefixes)
CG1	- onwards

Gearbox Number 4 speed	The 4 speed gearbox number is on the top right hand side of the gearbox housing next to the top cover plate.
CG1	- onwards

Gearbox Number 5 speed	The 5 speed gearbox number is on the left hand side at the front of the main gear case.
CL1	- onwards

Automatic gearbox number	The Automatic gearbox number is on the manufacturer's plate on the left hand side of the casing.
027M1	- onwards (type 65)
076N1	- onwards (type 66)

Rear Axle Number	The rear axle number is located beneath the differential case.
CG1	- onwards (3,63:1 ratio; 4 speed manual)
CH1	- onwards (3,9:1 ratio; 5 speed manual)
CT1	- onwards (3,27:1 ratio; automatic)

Trim Colour	The trim colour of your car is identified by a three letter code on the commission/VIN plate. If you've got black, navy or one of the contrasting check materials then you should be able to sort it. Golden Tan (a colour used after 1979) and beige (a colour used between 1975 and 1980) are a little more difficult if you haven't a sample to go by. The solution is easy, on your commission/VIN plate, 'AAA' is beige, 'AAM' is golden tan (and for the record, 'RAG' is golden tan with check inserts).

Production Details
The TR7, revealed in January 1975 was totally different to any TR which had gone before - indeed many said that the car should not have borne the TR title since it appeared to be in no way related to its forerunners. From the original design of Sports 20 TR1 (designed by the team of Walter Belgrove and first seen at Earls Court in October 1952) to the TR6 'brick' there was a continuity of design.

Chassis
The chassis altered gradually underneath each new body design. The mechanical changes were intertwined with uprated engines, but here was a totally new concept facing up to the challenges of the North American markets. The car was styled by Harris Mann of the Austin Morris division, mechanical design was entrusted to Charles Spencer ('Spen') King of Rover, a devout believer in a well located live rear axle (hence the apparently retrograde step from the independent rear suspension of the TR4A, TR5 and TR6).

Bodywork
The bodywork consisted of a strong unitary construction bodyshell which gained extra rigidity from the roof (specified to deal with expected Federal roll over regulations due to be announced shortly after) and included strengthening pillars inside the doors to guard against injuries during broadside road accidents. Early prototypes of the Fury (an earlier design project) had proved that this construction would be sufficiently strong for use even without a roof; an important point for later production of the convertible models introduced in 1979 (USA) and 1980 (UK).

Engine
The engine was an overhead cam, alloy head unit of 1998cc, inclined over at 45°, variations of which were being used in the Saab 99 (jointly developed by Saab), and the Dolomite 1850. It had also been used in an experimental Spitfire as far back as 1966. Compression ratio for Non Federal markets was 9,25:1, twin SU HS6 carburettors were fitted to produce 105bhp. Federal markets opted for Zenith Stromberg carburettors and lots of emission control which sadly dragged the power output down to 92bhp as well as increasing fuel consumption.

Gearbox
The gearbox was originally a four speed unit - as used on the Marina and Spitfire, and was used in conjunction with a light duty rear axle and the Spitfire rear differential ratio of 3,63:1. Rear brakes fitted to the axle used 8" x 1,5" drums. The optional five speed unit (becoming standard in 1978 when production of the TR7 & new TR8 moved to Coventry) used a stronger rear axle with a 3,9:1 differential ratio coupled to rear brake drums of 9" x 1,75". The '77mm box' (so called because of the spacing between the mainshaft and layshaft centres) was also used on the new Rover 3500, became well known as a reliable long lasting unit. Fourth gear was a direct drive with fifth an overdrive gear. For competition use the early TR7's used the Dolomite Sprint gearbox with overdrive until 1976, when it was replaced by the Rover 3500 '77 mm' gearbox. Alongside the five speed box was an automatic transmission version using a 3,27:1 rear differential. The Borg Warner 65 type three speed unit had been available from 1975.

Brakes
Although the rear brakes varied depending upon the axle used, the front brakes of the TR7 used only 9,7" discs (the TR8 used thicker discs of similar diameter with larger pads). The brake system incorporated a direct acting servo unit and had dual line hydraulics as standard.

TR7 Production
The TR7 was built in three different locations starting at the Speke plant in Liverpool (last car built: ACG44328). Production shifted to Canley in Coventry (first car built: TCG100000) in late 1978 after a crippling strike led to the closure of the Speke plant. Bodies were then produced by Pressed Steel Fisher. In 1980 production moved to the Rover plant at Solihull and continued there until the end of production in October 1981. For some time, the TR7 was produced concurrently at Canley and Solihull. TR8 was also built at all three factories (a handful of prototypes were built at Speke). As a final point of interest it has often been said that build quality reached a pinnacle during the Canley years and, was at its worst during the Speke production period, a worthwhile point to remember when purchasing a TR7.

TR8 Production
Although some TR8's escaped from strike bound captivity via MG at Abingdon to the USA in 1979, the TR8 was introduced mainly to the USA in convertible form during 1980. It incorporated the Rover 3500cc V8 engine coupled to the five speed box and axle ratio of 3,08:1. The only major external differences were in the bonnet pressing and badging, plus an extra exhaust pipe!