TRIUMPH
TR3B TR4 TR4A TR5 TR250 TR6
​GEARBOX

INTERNAL GEARS AND SHAFTS

Picture
1.  Input Shaft

2.  Bearing, input shaft

3.  Oil Thrower

4.  Bearing

5.  Snap Ring

6.  Washer

​7.  Circlip


-  145008      to gearbox CD20281
    158368      from gearbox 20282
-  60658

-  58391

-  58955

-  60078

​-  58956
Picture
8.  Countershaft

9.  Thrust Washer, front

10.  Bearing, caged

11.  Bearing, caged

12.  Thrust Washer, rear

13.  Countershaft Gear

14.  Gear, 2nd counter

15.  Gear, 3rd counter

16.  Spacer

17.  Gear, constant mesh
-  128105

-  129955

-  126862

-  126862

-  129956

-  128107    to CF12500
   UKC662    from CF12501
-  140508     to CD30646
   155047    from  CD30647
-  140509

-  59456

​-  159621      from CD21769
Picture
18.  Main Shaft

​

19.  Washer, between 1st and bearing

20.  Gear, 1st

​

21.  Bush, 1st and 3rd gear

22.  Washer, spacer

23.  Synchro Ring

24.  Sychro Hub Assembly, 1st and 2nd
​

25.  Spring, synchro hub
​

26.  Ball, synchro hub

27.  Washer, spacer

28.  Gear, 2nd


​

29.  Bush, 2nd gear
​

30.  Gear, 3rd
​

31.  Washer, retaining

32.  Circlip

33.  Synchro Hub Assembly, 3rd and 4th
​

34.  Bearing, mainshaft center

35.  Snap Ring, main bearing

36.  Washer

37.  Circlip

38.  Washer

39.  Bearing, tail

40.  Flange
​

41.  Washer

42.  Nut, slotted

​43.  Split pin
-  208051    TR3B - TR6 gearbox CD20281
   216393    TR6 CD20282 to CD21768
   216866    TR6 CD21769 to CF12500

​-  116496

-  128100    3B to CD20281   33 Teeth
   152770    CD20282 to CF12500  33 Teeth
   152803    from CF12501      32 Teeth

-  129940

-  129941 to 129944  (.118 to .127)

-  113431

-  515650    3B to CD19740
   153843    from CD19741

-  137988    3B to CD19740
   153318    from CD19741

-  BLS108

-  129941 to 129944  (.118 to .127)

-  105629     3B to CD20281
   152771      CD20282 to CD21768
   216802      CD21769 to CF12500
​   TKC454      from CF12501

-  129939     Bronze   up to CF12500
    UKC956    Steel      from CF12501

-  105630     3B to CD20281
    152772     from CD20282

-  157054

-  55707

-  509649     3B to CD19740
​    153844     from CD19741

-  58391

-  58955

-  59443

-  58956

-  58949

-  513897

-  58948     Square
    518109   Round

-  WP24

-  57868

​-  PC15
Picture
44.  Reverse Gear

45.  Spindle, reverse

46.  Lockplate

​47.  Screw, wedgelock
-  128110

-  129937

-  129938

​-  129954

EXTERNAL GEARBOX

Picture
1.  Top Cover

2.  Bolt, long

3.  Bolt, medium

4.  Bolt, short

​5.  Fork, 1st and 2nd Selector

6.  Shaft, 1st and 2nd

7.  Selector, 1st and 2nd

8.  Sleeve, 1st and 2nd

9.  Screw, fork and selectors

10.  Ball

11.  Spring

12.  Fork, 3rd and 4th

13.  Shaft, 3rd and 4th

14.  Sleeve, 3rd and 4th

15.  Roller, interlock

16.  Reverse Fork

17.  Shaft, reverse

18.  Selector, reverse

19.  Sleeve, reverse shaft

20.  Plunger, reverse selector

​21.  Plug
-  Various   TKC1000

​-  505241

-  505221

-  56370

-  128067

-  128066

-  127396

-  128063

-  122653

-  BLS112

-  155632

-  127387

-  129986

-  117811

-  106481

-  129780

-  132389

-  127385

-  209902

-  136990

-  156665
​
Picture
22.  Tail Extension

23.  Oil seal, rear

24.  Bracket

25.  Mount Assembly, rear

26.  Mounting

27.  Mount

28.  Pinion, speedometer

29.  Bearing, speedo pinion

​30.  Screw, locating bearing
 - 305048

-  146129

-  160117    1973-1976 non-od

-  160118    1973-1976

-  105043     1973-1976

-  104086     TR4-TR6 1972

-  147965

-  146542

-  506071
Picture
31.  Shift Lever

32.  Shift Lever

33.  Spring, anti rattle

34.  Plunger, anti rattle

35.  Spring

36.  Retainer, spring

37.  Cap, retainer

38.  Bolt

39.  Nut, nyloc

40.  Bolt

41.  Layshaft cover

42.  Front Cover Extension

43.  Oil Seal, front

​44.  Oil Plug
-  131507  TR4      143624 TR4A

-  148095   TR6

-  137988

-  112424

-  145796

-  112442

-  140816 and 156460 (late)

-  604281   TR3B-4A

-  GHF271

-  155542

-  55773

-  100157

-  141756

​-  114774