MG B GEAR CHANGE 3-SYNCHRO GEARBPX WITH OVERDRIVE - PARTS

CAR IDENTIFICATION MG B

When ordering parts it is essential that your car is identified exactly, by model year and serial number. Since many part
changes were made during model years, the car 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 use the space
provided below to copy the applicable numbers from your car. Use of these numbers is the best way to ensure that you
order and receive the correct parts. Wherever possible, we have listed part applications by car number (c). In some cases,
we had to use the engine numbers (e) or body numbers (b). Commission numbers, as used from 1968, are of little
significance and are not used for reference purposes. Where we use years, they are model years, not build dates. For
the sake of simplicity, we have deleted all alpha-numeric prefixes from change points found in our application columns.
While these letters are helpful in pinpointing certain production features, they do not affect the parts’ applications as listed.
Example: Car number GHN5/ UB/234567 is shown as (c) 234567. For more information on these numbers and years,
see the production data in the chart below.

Car Number

The Car Number for cars from 1963-69 is stamped on a plate secured to the right hand wing valance forward of the radiator.

The Car Number for cars from 1970 on is stamped on a plate secured to the left hand door post, and to a plate on top of the fascia.

Body Number

The Body Number for early chrome-bumpered cars is stamped on a plate on the left front valance behind the radiator
diaphragm as illustrated, or in some cases, in front of the radiator diaphragm.

Engine Number

The Engine Number is stamped on a plate secured to the right hand side of the cylinder block.

Commission Number

The Commission Number is stamped on a plate secured to the bonnet lock platform.

Gearbox Number

The Gearbox Number is stamped on top of the gearbox casing adjacent to the dipstick.

Power Unit Identification Serial Number Prefix Code (not V8)

Vehicle Identification Serial Number Prefix Letter Code (not V8)

Vehicle Identification Prefix Letter Code


* "1974-1/2" - The so-called "1974-1/2" model year began with roadster number 360301 and GT no. 361001 in September, 1974 and continued to the beginning of the 1975 model year.
** Calendar Year build dates are of historical significance only.
@ Commission Numbers were not used prior to 1968 model year.
# These numbers are approximate.
H 18GA engine used from car #31021 thru 48765.
Model Year	1st Month of Prod.		Car #First RD/GT	Car #First RD/GT Calendar Year**	Engine #First RD/GT	Commission #First RD/GT	Body # First RD/GT
1962	5/62	RD	-	GHN3/L/101	(3-main engine)	-	-
1963	1/63	RD	-	GHN3/L/4619	18G/UH/101 (3-main engine)	@	MGB/101
1964	8/63	RD	GHN3/L/19586	GHN3/L/27278	N/A H (3-main engine)	@	MGB/26813
1965	10/64	RD	GHN3/L/48766	GHN3/L/53635	18GB/UH/101 (first 5-main engine)	@	N/A
1965	10/64	GT	-	GHD3/L/71933	18GB/UH (con't.)	-	-
1966	10/65	RD	N/A	GHN3/L/75243	18GB/UH (con't.)	@	N/A
1966	10/65	GT	GHD3/L/71933	N/A	18GB/UH/30038	@	GBD/101
1967	11/66	RD	GHN3/L/108039	-	18GB/UH (con't.)	@	N/A
1967	11/66	GT	N/A	GHD3/L/109804	18GB/UH (con't.)	@	N/A
1968	10/67	RD	GHN4/U/138401	N/A	18GF/WE/H101	GU23N/101F	MGBU/101
1968	10/67	GT	GHD4/U/139472	N/A	18GF/WE/H101	GU23D/101P	GBUD/500101
1969	10/68	RD	GHN4/U/158371	GHN4/L/159806	18GH/WE/H101	G23N/18164#	MGB/14588#
1969	10/68	GT	GUD4/U/158233	GHD4/L/162552	18GH/WE/H101	N/A	N/A
1970	10/69	RD	GHN5/UA/187211	GHN5/UA/196222	18GH/-/22209	G23N/31862#	MGBU/27359
1970	10/69	GT	GHD5/UA/187841	GHD5/UA/194552	18GH/-/22209	G23D/18042	GBUD/510630
1971	9/70	RD	GHN5/UB/219021	GHN5/UB/232765	18GK/WE/H101	N/A	MGBU/300101
1971	9/70	GT	GHD5/UB/219355	GHD5/UB/233500	18GK/WE/H101	G23D/029048	GBUD/520235
1972	5/71	RD	GHN5/UC/258001	GHN5/UC/268635	18V/584Z/L101 (non O/D) 18V/585Z/L101 (O/D)	N/A	MGBU/400101
1972	5/71	GT	GHD5/UC/258004	GHD5/UC/269303	18V/585Z/L101 (O/D) 18V/672Z/L101 (non O/D)	G23D/047002	GBUD/620101
1973	8/72	RD	GHN5/UD/294251	GHN5/UD/307772	18V/63Z/L101 (O/D)	G23N/62557#	MGBU/500101
1973	8/72	GT	GHD5/UD/296001	GHD5/UD/31600	18V/672Z/L101 (non O/D) 18V/673/L101 (O/D)	N/A	GBUD/720101
1974*	8/73	RD	GHN5/UE/328101	GHN5/UE/338790	18V/672Z/L14891 (non O/D)# 18V/673Z/l14891 (O/D)#	G23N/86226#	MGBU/600101
1974*	8/73	GT	GHD5/UE/328801	GHD5/UE/338560	18V/672Z/L13234 (non O/D)#	G23D/70589	GBUD/820101
1974	9/74	1. Rubberbumper Model Roadster - from Chassis-No. 360301
1974	9/74	1. Chromebumper Model GT - from Chassis-No. 361001
1975	12/74	RD	GHN5/UF/368082 (N.Amer.) GHN5/UF/367901 (non-N.A.)	GHN5/UF/368090	18V/797AE/L101 (non O/D) 18V/798AE/L101 (O/D)	G23N/115009#	GU23T/7707
1975	12/74	GT	N/A	GHD5/UF/369101	N/A	N/A	N/A
1976	9/75	RD	GHN5/UG/386601	GHN5/UG/393763	18V/801AE/L101 (non O/D) 18V/802AE/L101 (O/D)	G23N/129440#	GU23T/50101
1976	9/75	GT	N/A	GHD5/UG/394665	N/A	N/A	N/A
1977	6/76	RD	GHN5/UH/410001	GHN5//UH/424748	18V/883AE/L101 (non O/D) 18V/884AE/L101 (O/D)	N/A	GU23T/760000
1977	6/76	GT	GHD5/UH/410351	GHD5/UH/422730	N/A	N/A	N/A
1978	9/77	RD	GHN5/UJ/447001	GHN5/UJ/455743	N/A	N/A	GU23T/860000
1978	9/77	GT	N/A	GHD5/UJ/455283	N/A	N/A	N/A
1979	6/78	RD	GHN5/UL/471001	GHN5/UL/485179	18V/883AEL/29033 (non O/D) #	N/A	GU23T/960000
1979	6/78	GT	N/A	GHD5/UL/483812	N/A	N/A	N/A
1980	6/79	RD	GVVDJ2AG/501001	GVVDJ2AIG/507309	18V/883AEL/43540 (non O/D) #	N/A	GU23T /984080#
1980	6/79	GT	N/A	GVGEJIAG/507309	N/A	N/A	N/A

3 SYNCHRO - OVERDRIVE

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	22H158	ARM INTERLOCKING	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
2	GHF105	SCREW 3/8 UNF X 1IN	1		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
3	GHF202	NUT PLAIN 3/8 UNF	1		CHF 0.15

Ill.no.	Partno.	Part	Quantity required	Info	Price
4	22H15	BUSH, GEAR LEVER	2		CHF 9.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
5	22H252	REAR SELECTOR LEVER	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
6	22H175	LEVER SCREW	2		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
7	GHF332	WASHER SPRING 5/16	2		CHF 0.25

Ill.no.	Partno.	Part	Quantity required	Info	Price
8	WKN404	WOODRUFF KEY 1/2 D X 1/8	2		CHF 2.85

Ill.no.	Partno.	Part	Quantity required	Info	Price
9	22H431	SELECTOR LEVER SHAFT	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
10	22H173	ARM SELECTOR FR	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
11	22H254	LEVER INTERMEDIATE	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
12	22H255	SHAFT	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
13	22H176	PLUNGER NCA	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
14	22H177	SPRING NCA	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
15	AEG3122	COPPER WASHER 7/8 OD	1		CHF 2.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
16	22H178	CAP NCA	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
17	22H203	PLUNGER	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
18	22H204	SPRING	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
19	22H205	PIN	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
20	BLS110	BALLBEARING 5/16 DIA	1	to 18GB RUH 54405	CHF 0.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
21	22H163	PLUNGER NCA	1	to 18GB RUH 54405	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
22	6K638	SEALING WASHER, COPPER, 1/2" ID	1	to 18GB RUH 54405	CHF 0.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
23	22B594	PLUG NCA	1	to 18GB RUH 54405	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
24	2A3108	PLUNGER SELECTOR REV S&M - MGB	1	18GB RUH 54406 on with reverse lights	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
25	22H1031	PLUNGER NCA	1	18GB RUH 54406 on with reverse lights	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
26	1B3664	WASHER FIBRE 5/8"	a/r	18GB RUH 54406 on with reverse lights	CHF 0.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
27	22H1033	PLUG NCA	1	18GB RUH 54406 on with reverse lights	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
28	BAU1074A	USE BAU1074Z	1	18GB RUH 54406 on with reverse lights

Ill.no.	Partno.	Part	Quantity required	Info	Price
29	22H576	LOCATING PIN NCA	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
30	1G3863	SPRING	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
31	22A75	SPRING PLUNGER	1		CHF 6.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
32	11G3131	SELECTOR REVERSE	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
33	11G3132	USE 11G3132SR	1

Ill.no.	Partno.	Part	Quantity required	Info	Price
34	11G3133	3&4TH SELECTOR	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
35	1G3708	SCREW LOCATING	3		CHF 2.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
36	11G3137	ROD REVERSE	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
37	11G3079	SELECTOR SHAFT 1/2ND MGA/B	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
38	11G3140	SELECTOR ROD	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
39	BLS110	BALLBEARING 5/16 DIA	3		CHF 0.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
40	22A75	SPRING PLUNGER	3		CHF 6.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
41	SH604071	SCREW 1/4" UNF X 7/8"	2		CHF 0.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
42	GHF331	WASHER SPRING 1/4"	2		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
43	AEG3108	LOCATING DOWEL	2		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
44	11G3134	SELECTOR FORK REVERSE GEAR	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
45	11G3135	SELECTOR 1ST/2ND #	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
46	1H3257	SELECTOR FORK 3RD/4TH GEAR	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
47	1H3258	DISTANCE PIECE 3/4TH SELECTOR MGB >18GB NCA	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
48a	2A3492	SCREW, LOCATING, 1/4"	3	replaced by 48b & 49b	CHF 15.90
48b	2A3492	SCREW, LOCATING, 1/4"	3	use together with 49b JN2107	CHF 15.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
49a	FNZ504	NUT 1/4 UNF HT	3	replaced by 48b & 49b	CHF 4.05
49b	JN2107	HALF NUT 1/4 UNF	3	use together with 48b 2A3492	CHF 1.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
50	GHF321	WASHER STAR 1/4" ID	3		CHF 0.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	22H158	ARM INTERLOCKING	1		availability request (add quantity to basket, offer follows)
2	GHF105	SCREW 3/8 UNF X 1IN	1		CHF 0.55
3	GHF202	NUT PLAIN 3/8 UNF	1		CHF 0.15
4	22H15	BUSH, GEAR LEVER	2		CHF 9.40
5	22H252	REAR SELECTOR LEVER	1		availability request (add quantity to basket, offer follows)
6	22H175	LEVER SCREW	2		availability request (add quantity to basket, offer follows)
7	GHF332	WASHER SPRING 5/16	2		CHF 0.25
8	WKN404	WOODRUFF KEY 1/2 D X 1/8	2		CHF 2.85
9	22H431	SELECTOR LEVER SHAFT	1		availability request (add quantity to basket, offer follows)
10	22H173	ARM SELECTOR FR	1		availability request (add quantity to basket, offer follows)
11	22H254	LEVER INTERMEDIATE	1		availability request (add quantity to basket, offer follows)
12	22H255	SHAFT	1		availability request (add quantity to basket, offer follows)
13	22H176	PLUNGER NCA	1		availability request (add quantity to basket, offer follows)
14	22H177	SPRING NCA	1		availability request (add quantity to basket, offer follows)
15	AEG3122	COPPER WASHER 7/8 OD	1		CHF 2.50
16	22H178	CAP NCA	1		availability request (add quantity to basket, offer follows)
17	22H203	PLUNGER	1		availability request (add quantity to basket, offer follows)
18	22H204	SPRING	1		availability request (add quantity to basket, offer follows)
19	22H205	PIN	1		availability request (add quantity to basket, offer follows)
20	BLS110	BALLBEARING 5/16 DIA	1	to 18GB RUH 54405	CHF 0.90
21	22H163	PLUNGER NCA	1	to 18GB RUH 54405	availability request (add quantity to basket, offer follows)
22	6K638	SEALING WASHER, COPPER, 1/2" ID	1	to 18GB RUH 54405	CHF 0.75
23	22B594	PLUG NCA	1	to 18GB RUH 54405	availability request (add quantity to basket, offer follows)
24	2A3108	PLUNGER SELECTOR REV S&M - MGB	1	18GB RUH 54406 on with reverse lights	availability request (add quantity to basket, offer follows)
25	22H1031	PLUNGER NCA	1	18GB RUH 54406 on with reverse lights	availability request (add quantity to basket, offer follows)
26	1B3664	WASHER FIBRE 5/8"	a/r	18GB RUH 54406 on with reverse lights	CHF 0.35
27	22H1033	PLUG NCA	1	18GB RUH 54406 on with reverse lights	availability request (add quantity to basket, offer follows)
28	BAU1074A	USE BAU1074Z	1	18GB RUH 54406 on with reverse lights
29	22H576	LOCATING PIN NCA	1		availability request (add quantity to basket, offer follows)
30	1G3863	SPRING	1		availability request (add quantity to basket, offer follows)
31	22A75	SPRING PLUNGER	1		CHF 6.10
32	11G3131	SELECTOR REVERSE	1		availability request (add quantity to basket, offer follows)
33	11G3132	USE 11G3132SR	1
34	11G3133	3&4TH SELECTOR	1		availability request (add quantity to basket, offer follows)
35	1G3708	SCREW LOCATING	3		CHF 2.40
36	11G3137	ROD REVERSE	1		availability request (add quantity to basket, offer follows)
37	11G3079	SELECTOR SHAFT 1/2ND MGA/B	1		availability request (add quantity to basket, offer follows)
38	11G3140	SELECTOR ROD	1		availability request (add quantity to basket, offer follows)
39	BLS110	BALLBEARING 5/16 DIA	3		CHF 0.90
40	22A75	SPRING PLUNGER	3		CHF 6.10
41	SH604071	SCREW 1/4" UNF X 7/8"	2		CHF 0.40
42	GHF331	WASHER SPRING 1/4"	2		CHF 0.55
43	AEG3108	LOCATING DOWEL	2		availability request (add quantity to basket, offer follows)
44	11G3134	SELECTOR FORK REVERSE GEAR	1		availability request (add quantity to basket, offer follows)
45	11G3135	SELECTOR 1ST/2ND #	1		availability request (add quantity to basket, offer follows)
46	1H3257	SELECTOR FORK 3RD/4TH GEAR	1		availability request (add quantity to basket, offer follows)
47	1H3258	DISTANCE PIECE 3/4TH SELECTOR MGB >18GB NCA	1		availability request (add quantity to basket, offer follows)
48a	2A3492	SCREW, LOCATING, 1/4"	3	replaced by 48b & 49b	CHF 15.90
48b	2A3492	SCREW, LOCATING, 1/4"	3	use together with 49b JN2107	CHF 15.90
49a	FNZ504	NUT 1/4 UNF HT	3	replaced by 48b & 49b	CHF 4.05
49b	JN2107	HALF NUT 1/4 UNF	3	use together with 48b 2A3492	CHF 1.05
50	GHF321	WASHER STAR 1/4" ID	3		CHF 0.45