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  • Internal Gearbox: 3 Rail - Spitfire MkI-IV (1962-74)
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See full listing
Key
Description
Application
Part No.
Price
Qty
 
 
1

CONSTANT PINION SHAFT

Part Number: 208324

Application: 3 Synchro - MkI-II

3 Synchro - MkI-II
208324
NCA

CONSTANT PINION SHAFT

Part Number: NPN

Application: 3 Synchro - MkIII

Notes: The constant pinion shaft for the MkIII 3 synchro was only ever supplied as part of a gear train assembly (part nos. 148030 & 153689), comprising of constant pinion shaft (item 1), needle roller bearing (item 3), 3rd speed gear (item 30) and laygear cluster (item 47).... See more

3 Synchro - MkIII
NPN
NCA
2

GEAR TRAIN ASSEMBLY

Part Number: 148030

Application: 3 Synchro - MkIII early

3 Synchro - MkIII early
148030
NCA

GEAR TRAIN ASSEMBLY

Part Number: 153689

Application: 3 Synchro - MkIII late

3 Synchro - MkIII late
153689
£375.00
3

BEARING, needle roller, press fit

Part Number: 118507

Application: 3 Synchro - MkI to early MkIII

3 Synchro - MkI to early MkIII
118507
£19.20

BEARING, needle roller, loose fit

Part Number: 144782

Application: 3 Synchro - MkIII late

3 Synchro - MkIII late
144782
£10.69
4

OIL THROWER

Part Number: 106365

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
106365
NCA
5

BEARING, front main

Part Number: 104433

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
104433
£13.90
6

CIRCLIP, snap ring

Part Number: 112654

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
112654
NCA
7

THRUST WASHER, mainshaft, 0.094”

Part Number: 104438

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
104438
NCA
8

CIRCLIP, constant pinion shaft

Part Number: CR620325

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
CR620325
NCA
9

MAINSHAFT, non-overdrive

Part Number: 204679

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
204679
£318.30
10

MAINSHAFT, overdrive

Part Number: 208142

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
208142
NCA
11

BEARING, rear main

Part Number: 104433

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
104433
£13.90
12

CIRCLIP, snap ring

Part Number: 112654

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
112654
NCA
13

WASHER

Part Number: 104438

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
104438
NCA
14

CIRCLIP

Part Number: 500872

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
500872
NCA
15

GEAR, speedo drive

Part Number: 119131

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
119131
NCA
16

WASHER

Part Number: 117509

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
117509
NCA
17

BEARING, rear extension

Part Number: 117511

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
117511
£15.49
18

SEAL, rear

Part Number: 22G2353

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
22G2353
£4.90
19

FLANGE, to prop shaft

Part Number: 109050

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
109050
NCA
20

WASHER, plain

Part Number: WM74

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
WM74
NCA
21

NUT, 9/16"

Part Number: HN2012

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
HN2012
NCA
22

SYNCHRO RING, 4th gear

Part Number: 148409

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
148409
£17.20

SYNCHRO RING, 4th gear, competition

Part Number: 148409X

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
148409X
£26.60
23

SYNCHRO HUB, 3rd/4th

Part Number: 509651

Application: 3 Synchro - MkI-MkIII early

3 Synchro - MkI-MkIII early
509651
NCA

SYNCHRO HUB, 3rd/4th

Part Number: 156968

Application: 3 Synchro - MkIII late

3 Synchro - MkIII late
156968
NCA
24

SYNCHRO RING, 3rd gear

Part Number: 113797

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
113797
NCA
25

SPRING, in synchro sleeve

Part Number: 104445

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
104445
£0.49
26

SHIM, under spring

Part Number: 037948

Application: 3 Synchro - MkI-III

Notes: This shim is selectively fitted under each of the springs and balls in the two synchro hubs in the gearbox. Its use is to equalise the outward pressure of the balls in the hub. Equalising the pressure can only be achieved with special spring balance equipment, so it only remains to be said that if you have to take a hub apart for inspection or cleaning, make sure (by means of scribing identifying marks on non-working surfaces of the gear) that the correct shims go back in their respective holes. Along the same lines as the above, use corresponding scribed marks on the hub and outer ring to ensure that the ring is slipped back in place exactly as it was before (and the same way round!).... See more

3 Synchro - MkI-III
037948
£1.00
27

BALL BEARING, 1st/2nd synchro hub

Part Number: BLS108

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
BLS108
£2.20
28

CIRCLIP, retaining gear on mainshaft

Part Number: TKC6444

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
TKC6444
£1.69
29

THRUST WASHER

Part Number: 159978

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
159978
NCA
30

GEAR, 3rd speed

Part Number: 116169

Application: 3 Synchro - MkI-III early

Notes: Part of 148030

3 Synchro - MkI-III early
116169
NCA

GEAR, 3rd speed

Part Number: 216317

Application: 3 Synchro - MkIII late

Notes: Part of 153689

3 Synchro - MkIII late
216317
NCA
31

BUSH, 3rd gear

Part Number: 111423

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
111423
£6.59
32

THRUST WASHER, 2nd/3rd, 0.153"

Part Number: 111422

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
111422
NCA

THRUST WASHER, 2nd/3rd, 0.162"

Part Number: 131843

Application: 3 Synchro - MkIII

3 Synchro - MkIII
131843
NCA

THRUST WASHER, 2nd/3rd, 0.157"

Part Number: 149963

Application: 3 Synchro - MkIII

3 Synchro - MkIII
149963
£0.70
33

BUSH, 2nd gear

Part Number: 111424

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
111424
NCA
34

GEAR, 2nd speed

Part Number: 112672

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
112672
NCA
35

THRUST WASHER, 1st/2nd

Part Number: 106262

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
106262
NCA
36

SYNCHRO RING, 2nd gear

Part Number: 148409

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
148409
£17.20

SYNCHRO RING, 2nd gear, competition

Part Number: 148409X

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
148409X
£26.60
37

GEAR, 1st speed & sleeve

Part Number: 509652

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
509652
NCA
38

PIN, locking

Part Number: 106475

Application: 3 Synchro - MkI-III

Notes: Fitted in sleeve

3 Synchro - MkI-III
106475
NCA
39

BALL, interlock

Part Number: BLS108

Application: 3 Synchro - MkI-III

Notes: Fitted in sleeve

3 Synchro - MkI-III
BLS108
£2.20
40

SPRING, in synchro hub

Part Number: 106388

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
106388
£1.09
41

SHIM

Part Number: 037948

037948
£1.00
42

BALL BEARING, 1st/2nd synchro hub

Part Number: BLS108

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
BLS108
£2.20
43

LAYSHAFT

Part Number: 113230

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
113230
£51.00
44

SCREW, locating layshaft in casing

Part Number: 106476

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
106476
NCA
45

WASHER, locking

Part Number: GHF332

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
GHF332
£0.49
46

BUSH, laygear

Part Number: 112477

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
112477
NCA
47

LAYGEAR CLUSTER

Part Number: 129815

Application: 3 Synchro - MkI-II

3 Synchro - MkI-II
129815
NCA

LAYGEAR CLUSTER, includes bushes

Part Number: 153689

Application: 3 Synchro - MkIII

Notes: The MkIII Laygear was originally only supplied as part of the gear train assembly (part no. 148030 & 153689). The change points were not listed by the factory.... See more

3 Synchro - MkIII
153689
£375.00
48

THRUST WASHER, front

Part Number: 113229

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
113229
£4.99
49

THRUST WASHER, rear

Part Number: 106270

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
106270
£11.29
50

THRUST WASHER, rear

Part Number: 106271

Application: 3 Synchro - MkI-III

3 Synchro - MkI-III
106271
NCA
60

CONSTANT PINION SHAFT

Part Number: 216611

Application: 4 Synchro - MkIV

Notes: 1st motion shaft

4 Synchro - MkIV
216611
NCA
61

BEARING, constant pinion

Part Number: 144782

Application: 4 Synchro - MkIV

4 Synchro - MkIV
144782
£10.69
62

OIL THROWER

Part Number: 106365

Application: 4 Synchro - MkIV

4 Synchro - MkIV
106365
NCA
63

BEARING, front main

Part Number: 104433

Application: 4 Synchro - MkIV

4 Synchro - MkIV
104433
£13.90
64

CIRCLIP, snap ring

Part Number: 112654

Application: 4 Synchro - MkIV

4 Synchro - MkIV
112654
NCA
65

THRUST WASHER, mainshaft, 0.094”

Part Number: 104438

Application: 4 Synchro - MkIV

4 Synchro - MkIV
104438
NCA
66

CIRCLIP

Part Number: 129839

Application: 4 Synchro - MkIV

4 Synchro - MkIV
129839
£0.79
67

MAINSHAFT, non-overdrive

Part Number: TKC533

Application: 4 Synchro - MkIV

4 Synchro - MkIV
TKC533
£270.00
68

MAINSHAFT, ‘D’ type overdrive

Part Number: TKC923

Application: 4 Synchro - MkIV to FH60000

4 Synchro - MkIV to FH60000
TKC923
£297.00

MAINSHAFT, ‘J’ type overdrive

Part Number: TKC899

Application: 4 Synchro - MkIV from FH60001

4 Synchro - MkIV from FH60001
TKC899
NCA
69

BEARING, rear main

Part Number: 104433

Application: 4 Synchro - MkIV

4 Synchro - MkIV
104433
£13.90
70

CIRCLIP, snap ring

Part Number: 112654

Application: 4 Synchro - MkIV

4 Synchro - MkIV
112654
NCA
71

WASHER, 0.120”

Part Number: 155805

Application: 4 Synchro - MkIV

4 Synchro - MkIV
155805
NCA

WASHER, 0.123”

Part Number: 155806

Application: 4 Synchro - MkIV

4 Synchro - MkIV
155806
NCA

WASHER, 0.126”

Part Number: 155807

Application: 4 Synchro - MkIV

4 Synchro - MkIV
155807
NCA

WASHER, 0.129”

Part Number: 155808

Application: 4 Synchro - MkIV

4 Synchro - MkIV
155808
NCA
72

CIRCLIP, speedometer drive gear

Part Number: 129839

Application: 4 Synchro - MkIV

4 Synchro - MkIV
129839
£0.79
73

BALL BEARING

Part Number: BLS106

Application: 4 Synchro - MkIV

4 Synchro - MkIV
BLS106
£0.40
74

GEAR, speedo drive

Part Number: 156032

Application: 4 Synchro - MkIV

4 Synchro - MkIV
156032
£20.00
75

WASHER, 1/8” thick

Part Number: 155756

Application: 4 Synchro - MkIV

Notes: Non Overdrive

4 Synchro - MkIV
155756
NCA
76

BEARING, rear extension

Part Number: 157732

Application: 4 Synchro - MkIV

Notes: Non Overdrive

4 Synchro - MkIV
157732
£11.69
77

SEAL, rear

Part Number: 22G2353

Application: 4 Synchro - MkIV

Notes: Non Overdrive

4 Synchro - MkIV
22G2353
£4.90
78

FLANGE, to prop shaft

Part Number: 155755

Application: 4 Synchro - MkIV

Notes: Non Overdrive

4 Synchro - MkIV
155755
NCA
79

WASHER, plain

Part Number: WM74

Application: 4 Synchro - MkIV

Notes: Non Overdrive

4 Synchro - MkIV
WM74
NCA
80

NUT, nyloc

Part Number: 510618A

Application: 4 Synchro - MkIV

Notes: Non Overdrive

4 Synchro - MkIV
510618A
£2.20
81

SYNCHRO RING, 4th gear

Part Number: 150328

Application: 4 Synchro - MkIV

4 Synchro - MkIV
150328
£15.70
82

SYNCHRO HUB, 3rd/4th

Part Number: 156968

Application: 4 Synchro - MkIV

4 Synchro - MkIV
156968
NCA
83

SYNCHRO RING, 3rd gear

Part Number: 150328

Application: 4 Synchro - MkIV

4 Synchro - MkIV
150328
£15.70
84

SPRING, synchro

Part Number: 104445

Application: 4 Synchro - MkIV

4 Synchro - MkIV
104445
£0.49
85

SHIM

Part Number: 037948

Application: 4 Synchro - MkIV

4 Synchro - MkIV
037948
£1.00
86

BALL BEARING, 3rd/4th synchro hub

Part Number: BLS108

Application: 4 Synchro - MkIV

4 Synchro - MkIV
BLS108
£2.20
87

CIRCLIP, snap ring, 3rd gear

Part Number: TKC6444

Application: 4 Synchro - MkIV

4 Synchro - MkIV
TKC6444
£1.69
88

THRUST WASHER, with internal lugs

Part Number: 159978

Application: 4 Synchro - MkIV

4 Synchro - MkIV
159978
NCA
89

GEAR, 3rd speed

Part Number: TKC3003

Application: 4 Synchro - MkIV

4 Synchro - MkIV
TKC3003
£48.40
90

BUSH, 3rd gear

Part Number: 147354

Application: 4 Synchro - MkIV

4 Synchro - MkIV
147354
£27.80
91

THRUST WASHER, 2nd/3rd, 0.153”

Part Number: 111422

Application: 4 Synchro - MkIV

Notes: See box A in illustration.

4 Synchro - MkIV
111422
NCA

THRUST WASHER, 2nd/3rd, 0.162”

Part Number: 131843

Application: 4 Synchro - MkIV

Notes: See box A in illustration.

4 Synchro - MkIV
131843
NCA

THRUST WASHER, 2nd/3rd, 0.157”

Part Number: 149963

Application: 4 Synchro - MkIV

Notes: See box A in illustration.

4 Synchro - MkIV
149963
£0.70

THRUST WASHER, 2nd/3rd, 0.166”

Part Number: 156084

Application: 4 Synchro - MkIV

Notes: See box A in illustration.

4 Synchro - MkIV
156084
NCA

THRUST WASHER, 2nd/3rd, 0.170”

Part Number: UKC769

Application: 4 Synchro - MkIV

Notes: See box A in illustration.

4 Synchro - MkIV
UKC769
NCA
92

BUSH, 2nd speed

Part Number: 147354

Application: 4 Synchro - MkIV

Notes: See box A in illustration.

4 Synchro - MkIV
147354
£27.80
93

GEAR, 2nd speed

Part Number: 154479

Application: 4 Synchro - MkIV

Notes: See box A in illustration.

4 Synchro - MkIV
154479
£43.60
94

THRUST WASHER

Part Number: 160018

Application: 4 Synchro - MkIV

Notes: Has 4 radial grooves each side.

4 Synchro - MkIV
160018
NCA
95

BUSH, 2nd gear

Part Number: UKC933

Application: 4 Synchro - MkIV

Notes: See box b in illustration.

4 Synchro - MkIV
UKC933
NCA
96

BALL BEARING

Part Number: BLS106

Application: 4 Synchro - MkIV

Notes: See box b in illustration.

4 Synchro - MkIV
BLS106
£0.40
97

GEAR, 2nd speed

Part Number: UKC3364

Application: 4 Synchro - MkIV

Notes: See box b in illustration.

4 Synchro - MkIV
UKC3364
NCA
98

THRUST WASHER, 0.199”

Part Number: UKC934

Application: 4 Synchro - MkIV

Notes: See box b in illustration.

4 Synchro - MkIV
UKC934
NCA

THRUST WASHER, 0.202”

Part Number: UKC935

Application: 4 Synchro - MkIV

Notes: See box b in illustration.

4 Synchro - MkIV
UKC935
NCA

THRUST WASHER, 0.205”

Part Number: UKC936

Application: 4 Synchro - MkIV

Notes: See box b in illustration.

4 Synchro - MkIV
UKC936
NCA

THRUST WASHER, 0.206”

Part Number: UKC937

Application: 4 Synchro - MkIV

Notes: See box b in illustration.

4 Synchro - MkIV
UKC937
NCA
99

SYNCHRO RING, 2nd gear

Part Number: 150328

Application: 4 Synchro - MkIV

4 Synchro - MkIV
150328
£15.70
100

SYNCHRO HUB, 1st/2nd gear

Part Number: 156911WO

Application: 4 Synchro - MkIV

Notes: 33 teeth

4 Synchro - MkIV
156911WO
NCA
101

SPRING, in synchro hub

Part Number: 106388

Application: 4 Synchro - MkIV

4 Synchro - MkIV
106388
£1.09
102

SHIM

Part Number: 037948

Application: 4 Synchro - MkIV

4 Synchro - MkIV
037948
£1.00
103

BALL BEARING, 1st/2nd synchro hub

Part Number: BLS108

Application: 4 Synchro - MkIV

4 Synchro - MkIV
BLS108
£2.20
104

SYNCHRO RING, 1st gear, bottom

Part Number: 150328

Application: 4 Synchro - MkIV

4 Synchro - MkIV
150328
£15.70
105

SPLIT COLLAR, pair

Part Number: 137834

Application: 4 Synchro - MkIV

4 Synchro - MkIV
137834
NCA
106

GEAR, 1st speed

Part Number: 154821

Application: 4 Synchro - MkIV

4 Synchro - MkIV
154821
NCA
107

WASHER, spacer

Part Number: 137775

Application: 4 Synchro - MkIV

4 Synchro - MkIV
137775
NCA
108

LAYSHAFT

Part Number: 144595

Application: 4 Synchro - MkIV

4 Synchro - MkIV
144595
£31.80

LAYSHAFT, aftermarket

Part Number: 144595Z

Application: 4 Synchro - MkIV

4 Synchro - MkIV
144595Z
NCA
109

ROLL PIN, locating layshaft

Part Number: DS1908

Application: 4 Synchro - MkIV

4 Synchro - MkIV
DS1908
£0.40
110

THRUST WASHER, rear

Part Number: 106270

Application: 4 Synchro - MkIV

4 Synchro - MkIV
106270
£11.29
111

RETAINING RING

Part Number: 119891

Application: 4 Synchro - MkIV

4 Synchro - MkIV
119891
£6.70
112

NEEDLE ROLLER

Part Number: 119893

Application: 4 Synchro - MkIV

4 Synchro - MkIV
119893
£0.59
113

LAYGEAR CLUSTER

Part Number: 154829

Application: 4 Synchro - MkIV

4 Synchro - MkIV
154829
£390.00
114

RETAINING RING

Part Number: 119891

Application: 4 Synchro - MkIV

4 Synchro - MkIV
119891
£6.70
115

NEEDLE BEARING

Part Number: 119893

Application: 4 Synchro - MkIV

4 Synchro - MkIV
119893
£0.59
116

THRUST WASHER, front

Part Number: 113229

Application: 4 Synchro - MkIV

4 Synchro - MkIV
113229
£4.99
120

SPINDLE, reverse gear

Part Number: 113071

113071
NCA
121

SPACER

Part Number: 137687

Application: 4 synchro only

4 synchro only
137687
NCA
122

REVERSE IDLER GEAR

Part Number: 113077

Application: MkI-III, includes bush 104420

MkI-III, includes bush 104420
113077
NCA

REVERSE IDLER GEAR

Part Number: 144580

Application: MkIV, includes bush 104420

MkIV, includes bush 104420
144580
£49.00
123

BUSH

Part Number: 104420

104420
NCA
124

SCREW, locating

Part Number: 106477

106477
NCA
125

WASHER, locking

Part Number: GHF332

GHF332
£0.49
126

LEVER, reverse operating

Part Number: 106254

106254
NCA
127

FULCRUM PIN

Part Number: 106448

106448
£8.59
128

NUT, nyloc

Part Number: GHF273

GHF273
£0.49
See full listing View Table
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