Parts Spares & Accessories for Triumph Range Rover Land Rover Rover by Mail Order - Rimmer Bros Triumph TR6 Parts Spares & Accessories

Triumph TR6 Rear Axle

Page Contents
-

Rear Axle Unit Assembly
Axle Components
Crown Wheel & Pinions
Carrier & Differential Gears
Limited Slip Differential
Inner Axle Shaft
Rear Axle Repair Kit
Rear Axle Mountings
Consumables

-

The original ratio of the axle fitted to the Triumph TR6 PI is 3.45:1. The simple way to check is by counting the crown wheel and pinion teeth. The crown wheel will have 38 teeth and the pinion 11. The ratio is arrived at by dividing the quantity of teeth on the pinion into the quantity of teeth on the crown wheel. Other ratios that may be discovered fitted are 3.7:1 and occasionally 4.1:1. The petrol injected Triumph TR sports cars were the only ones to have the 3.45:1 ratio axle as standard fitment. Carburetted TR250s and TR6s were fitted with the 3.7:1 ratio, whilst the 4.1 was a special competition ratio. On the road, the difference between the 3.45 and 3.7 ratio is barely noticeable (unless you are using 60 series low profile tyres on 15" rims) whilst the 4.1 feels as though you have run out of gears! Selected other models from the Triumph range of the same period were also fitted with the 3.45:1 ratio, i.e., the Dolomite Sprint and 2.5 PI Innsbrück. As there was no ratio change during the production period of the TR6 PI axle they are assumed to be interchangeable between model years. This is true if entire units are replaced. If the internals of a certain model year are used to repair another axle of a different model year, problems may be encountered with non-compatible parts. The major significant change was the replacement of the solid, shim adjusted pinion bearing spacer for a collapsible type. The other item to change internally was the sun and planet gear sets. The early type had plain teeth, the later ones had a groove machined into their tooth edge to aid identification, and so should be fitted in sets of four when interchanged. For the record, we list below the original part numbers and ratios, for all popular applications. For all practical purposes, we list under 'Rear Axle Unit Assy' one part number (RR1112) with various options appearing as a suffix. It is then up to the customer to decide which options suits best.
Original No Ratio Applications
312061 3.45:1 TR6 to commission no. CP52867
313130 3.45:1 TR6 from commission no. CP52868
312060 3.7:1 TR6 to commission no. CC61570
313129 3.7:1 TR6 from commission no. CC61571


Rear Axle Unit Assembly

Reconditioned Exchange
We supply from stock, a range of fully reconditioned, ready to fit axle units on a strict exchange basis. These are available (depending upon your requirements and budget) with either a 3.45:1 or 3.7:1 ratio, with optional brand new crown wheel and pinion, and finally with a limited slip differential option (supplied only with a new crown wheel and pinion). Old exchange units returned to us should be complete and assembled, drained of oil, and be externally clean with no irreparable damage. Note that the front mounting plate and the rear aluminium housing (complete with 4 lugs) must be returned. Failure to comply with these requirements will result in retention of part or all of the exchange surcharge.

1. Rear Axle Assembly (3.45:1) - (1) - RR1112R3-45
Rear Axle Assembly (3.7:1) - (1) - RR1112R3-7
Rear Axle Assembly (3.45:1) - (1) - RR1112RN3-45
With new crown wheel and pinion.
Rear Axle Assembly (3.7:1) - (1) - RR1112RN3-7
With new crown wheel and pinion.
Rear Axle Assembly (3.45:1) - (1) - RR1112RNL3-45
With new crown wheel and pinion, and limited slip diff.
Rear Axle Assembly (3.7:1) - (1) - RR1112RNL3-7
With new crown wheel and pinion, and limited slip diff.

Axle Components




2. Cover & Axle Mounting (rear) - (1) - 149826
3. Plug (core, breather) - (1) - 118826
4. Split Pin (in breather plug) - (1) - 510408
5. Screw (rear cover to axle casing) - (8) - HU808
6. Washer (locking) - (8) - WL208
7. Gasket (rear cover to axle casing) - (1) - 134480
8. Housing Assembly (rear axle) - (1) - 305815
Includes bearing caps and retaining bolts.
9. Bolt (bearing cap retaining) - (4) - 100878
10. Washer (locking) - (4) - WL209
11. Dowel (rear cover locating) - (2) - 140419

12. Plug (oil filler and level) - (1) - 114774
Plug (oil filler and level) - (1) - 22G2115
Alternative.

31. Plate Assembly (axle mounting) - (1) - 211793
This is one of the weakest parts of the TR6. This pressed steel plate can be thin in certain areas, one of which coincides with a very high stress area, just inboard of the R/H front mounting area. It can be welded and re-inforced but should only be repaired by a truly competent welder. Only sound brackets will be accepted for exchange differentials, though it will be possible to repair a cracked bracket at extra cost.
14. Washer (distance) - (1) - 140007
Welded to plate assembly.
15. Bolt (mounting plate to axle casing) - (4) - 132856
16. Washer (shakeproof) - (4) - WN710

17. Plug (oil drain) - (1) - 114774
Plug (oil drain) - (1) - 22G2115
Alternative.
The axle is not provided originally with a drain plug for the lubricating oil. Many axles have been modified by owners or restorers to incorporate an oil drain plug. From a maintenance point of view the provision of a drain plug is desirable. Having to remove the axle rear cover to drain and change the oil periodically is inconvenient bordering on painful.

Crown Wheel & Pinions




18. Crown Wheel & Pinion Assembly (3.45:1) - (1) - 516398
Solid spacer type. To commission no. CP52867.
Crown Wheel & Pinion Assembly (3.7:1) - (1) - 502127
Solid spacer type. To commission no. CC61570.
Crown Wheel & Pinion Assembly (3.45:1) - (1) - UKC547
Collapsible spacer type. From commission no. CP52868.
Crown Wheel & Pinion Assembly (3.7:1) - (1) - UKC548
Collapsible spacer type. From commission no. CC61571.

Crown wheel and pinion sets of varying ratios were offered by the Competition Department at Triumph as follows :-

Crown Wheel & Pinion Assembly (4.1:1) - (1) - 505014
Solid spacer type. European model to commission no. CP52867.
Crown Wheel & Pinion Assembly (4.3:1) - (1) - 502523
Solid spacer type. European model to commission no. CP52867.
Crown Wheel & Pinion Assembly (4.55:1) - (1) - 503924
Solid spacer type. North American models to commission no. CC61570.
Crown Wheel & Pinion Assembly (4.875:1) - (1) - 515709
Solid spacer type. North American models to commission no. CC61570.

19. Spacer (solid) - (1) - 100846
To commission no. CP52867/CC61570.

20. Shim (to commission no. CP52867/CC61570);
0.003" (front pinion bearing) - (ar) - 100562
0.005" (front pinion bearing) - (ar) - 100563
0.010" (front pinion bearing) - (ar) - 100564

       Shim (alternatives);
0.003" (front pinion bearing) - (ar) - 140793
0.005" (front pinion bearing) - (ar) - 140792
0.010" (front pinion bearing) - (ar) - 140791

21. Spacer (collapsible) - (1) - 156903
From commission no. CP52868/CC61571.
22. Bearing Assembly (pinion head, rear) - (1) - 100897A

23. Shim (0.003", pinion bearing) - (ar) - 100965
Shim (0.005", pinion bearing) - (ar) - 100966
Shim (0.010", pinion bearing) - (ar) - 100967

24. Washer (adjusting, 0.40") - (ar) - 156398SHIM
The shims used to correctly position and pre-load the crown wheel and pinion and bearings did not change from TR2 to TR6 (including Stag, Sprint and Innsbrück saloons). The IRS axles require a single spacer, in addition, between the pinion and the pinion head bearing. It is argued that this spacer could be replaced with an equivalent number of shims between the pinion and head bearing as both achieve the same net result. Rebuilding of many hundreds of differentials has only ever-revealed spacers 0.040 thick. No parts book listed this spacer though a Triumph service release seems to indicate a range of thickness' (0.030 to 0.051) was available, part numbers 140643 to 140657.
In the absence of full engineering drawings it can only be guessed that the internal machining of the differential casings between solid axle TRs and IRS versions is different. With the introduction of the 3.45 to 1 ratio in 1967 the pinion teeth would foul the casing in some circumstances due to the larger pinion diameter, but that doesn't explain the spacers presence from 1965 in the TR4A differential which used 3.7 and 4.1 to 1 ratios. If the spacer is left in place and the contents of an IRS differential are fitted to a solid axle, the pinion face will usually foul the hub (or crown wheel carrier) as it rotates.

25. Bearing Assembly (pinion tail, front) - (1) - 100422

26. Seal (oil, pinion, front, leather) - (1) - 140337
Seal (oil, pinion, front, rubber) - (1) - 140337P
Leather varies in hardness and is susceptible to leakage. A change to our alternative rubber oil seal is an excellent and economic improvement.

27. Flange (pinion) - (1) - 138105
Flange (pinion) - (1) - 160275
From commission no. CP52868/CC61571.

28. Washer (pinion flange) - (1) - 115990
To commission no. CP52867/CC61570.
Washer (pinion flange) - (1) - 142333
From commission no. CP52868/CC61571.

29. Nut (slotted, pinion flange) - (1) - 112635
To commission no. CP52867/CC61570.
30. Wire (soft iron, locking slotted nut) - (1) - 514773
To commission no. CP52867/CC61570.
31. Nut (nyloc, pinion flange) - (1) - 159394
From commission no. CP52868/CC61571.
32. Shield (cap, over pinion nut) - (1) - UKC725
From commission no. CP52868/CC61571.
The fitment of a slotted nut that is positively locked by wire threaded through a drilled hole in the pinion threaded shank should indicate that an axle is fitted with the earlier crown wheel and pinion set that has a solid bearing spacer adjusted by shims.

Carrier & Differential Gears




33. Carrier (crown wheel & differential) - (1) - 302155
34. Bolt (crown wheel to carrier) - (10) - 110737
35. Washer (locking) - (10) - 118977
The crown wheel to carrier attachment bolts must be fitted using 'Loctite' or similar thread locking engineering adhesive. (GAC100). The use of the locking washers alone is insufficient. All the bolts must be tightened to the torque of 46 ft. lbs. as specified in the workshop manual.

36. Bearing Assembly (differential carrier) - (2) - 110515

37. Shim (0.003", adjusting bearing) - (ar) - 100894
Shim (0.005", adjusting bearing) - (ar) - 100895
Shim (0.010", adjusting bearing) - (ar) - 100896

38. Gear (side differential, sun wheel) - (2) - 113187
16 teeth, plain. Fit in pairs, alternative to 153384.
Gear (side differential, sun wheel) - (2) - 153384
16 teeth, with machined groove. Fit in pairs, alternative to 113187.

39. Washer (thrust, differential side gear) - (2) - 102801

40. Gear (differential pinion, planet) - (2) - 113188
10 teeth, plain. Fit in pairs, alternative to 153385.
Gear (differential pinion, planet) - (2) - 153385
10 teeth, with machined groove. Fit in pairs, alternative to 113188.

41. Thrust Washer;
0.046"/0.049" - (ar) - 56793
0.049"/0.051" - (ar) - 142165
0.051"/0.053" - (ar) - 139951
0.053"/0.055" - (ar) - 142166
0.055"/0.057" - (ar) - 139952
0.057"/0.059" - (ar) - 160373
0.059"/0.061" - (ar) - 139953
0.061"/0.063" - (ar) - 160374
0.063"/0.065" - (ar) - 139954
0.065"/0.067" - (ar) - 160375
0.067"/0.069" - (ar) - 139955
0.069"/0.071" - (ar) - 160376
0.071"/0.073" - (ar) - 139956

42. Pin (Cross, differential planet gears) - (1) - 100844
43. Pin (locating cross pin in carrier) - (1) - 111215

Limited Slip Differential




This design of torque sensing differential makes it a worthwhile addition to any competition or fast road car. Allowing maximum drive to both rear wheels giving more grip under hard acceleration. These differentials (crown wheel carriers) are for fitting inside your own axle. Alternatively, purchase one of our exchange rear axles - fully reconditioned, complete with brand new limited slip diff and crownwheel & pinion. See Rear Axle Unit Assy.

44. Limited Slip Differential (Quaife) - (1) - RKC2026Q

Inner Axle Shaft




45. Inner Axle Shaft (LH) - (1) - 149378
Uses nyloc nut.
Inner Axle Shaft (RH) - (1) - 149379
Uses nyloc nut.
Inner Axle Shaft (LH) - (1) - UKC4862
Alternative, uses castle nut.
Inner Axle Shaft (RH) - (1) - UKC4863
Alternative, uses castle nut.

46. Bearing Assembly (ball, axle shaft) - (2) - 134465
47. Housing (oil seal) - (2) - 128638
48. Seal (oil, inner axle shaft) - (2) - 138523
49. Screw (inner axle to casing) - (8) - HU806
50. Washer (locking) - (8) - WL208
51. Flange Assembly (driving, inner) - (2) - 149409
52. Stoneguard (welded to flange) - (2) - 134450
53. Key (inner flange to inner axle shaft) - (2) - 143280
54. Washer - (2) - 139043
55. Nut (nyloc, flange to inner axle shaft) - (2) - 138563
56. Nut (slotted,flange to inner axle shaft) - (2) - 21A79
57. Split Pin (locking slotted nut) - (2) - PC13

Rear Axle Repair Kit




58. Rear Axle Overhaul Kit - (1) - RR1389
Kit includes items listed below :-
7. Gasket (rear cover to axle casing) - (1) - 134480
22. Bearing Assembly (pinion head, rear) - (1) - 100897A
25. Bearing Assembly (pinion tail, front) - (1) - 100422
26. Seal (oil, pinion flange, axle front) - (1) - 140337
36. Bearing Assembly (differential carrier) - (2) - 110515
46. Bearing Assembly (ball, axle shaft) - (2) - 134465
48. Seal (oil, inner axle shaft) - (2) - 138523

Rear Axle Mountings




59. Rear Axle Mounting Kit - (1) - RR1390
Includes rubber front mountings.
Rear Axle Mounting Kit - (1) - RR1390POLY
Includes polyurethane front mountings.
Kits include the following items :-
60. Mounting (rubber, axle to chassis, rear) - (2) - 147783
61. Bolt (mounting rubber to axle cover) - (4) - HB811
62. Washer (plain) - (4) - WM58
63. Nut (nyloc) - (4) - TN3208
64. Washer (special, axle mounting) - (4) - 134234
65. Nut (nyloc, axle mounting to chassis) - (4) - TN3209

66. Mounting (upper front, axle to chassis, rubber) - (2) - 134235
Mounting (upper front, axle to chassis, polyurethane) - (2) - 134235POLY

67. Mounting (lower front, axle to chassis, rubber) - (2) - 134236
Mounting (lower front, axle to chassis, polyurethane) - (2) - 134236POLY

68. Washer (special, axle mounting) - (4) - 134234
69. Nut (nyloc, axle mounting to chassis) - (4) - TN3209


70. Bracket Kit (axle mounting front) - (2) - 140009K
Including reinforcements and stud pin.
71. Stud Only (axle mounting, front) - (2) - 147671
72. Bracket Kit (axle mounting, rear) - (2) - 140051K
Including stud.
73. Stud Only (axle mounting, rear) - (2) - 147400

Consumables




74. Engine Cleaner (Autoglym, 1 litre spray bottle) - (ar) - RX1325
75. WD40 (400ml can) - (ar) - GAC111
76. Jointing Compound (80ml) - (ar) - GHF6093
77. Studloc (Loctite, 10ml) - (ar) - GAC100
78. Grease (copper, anti-sieze, 85gm) - (ar) - RX1345
79. Hypoid Oil (80W/90, Unipart, 0.5 litre) - (ar) - GGL190



- Return to TR6 Axle & Propshaft Index -      - Return to TR6 Index Page -

The Parts You Need
- Home - About Rimmer Bros. - Prices - General Info - Delivery - How to Order - Your Order Form
- News - Restoration Projects - Picture Library - Triumph Links - Free Catalogue - Contact Us

©Rimmer Bros Ltd - Registered in England No. 2155394. VAT No. GB 352 8473 40.
The 'Triumph', 'Rover' and 'British Motor Heritage' Logos used herein are Registered Trade Marks of British Motor Heritage Ltd,
and are used with their Licence under the Special 'Heritage' approval Scheme.
All original part numbers & illustrations have been reproduced by kind permission of British Motor Heritage.

Fri, 21 Nov 2008