Triumph TR3B (TCF) TR4-4A-5-250 Mainshaft Gears - 4 Synchro

 GRID200104
  • Triumph TR3B (TCF) TR4-4A-5-250 Mainshaft Gears - 4 Synchro

Prices displayed in:
24
Synchro RingTriumph gearboxes originally used rings made of “Iron Bronze”, a sintered metal containing copper and iron predominately. This provided synchronising (of sorts) and long life. The brass compounds used these days offer improved synchronising, though nowhere near that of modern gearboxes. In reality the actual ring size and friction area are inadequate. The working life of the ring is indicated externally by the gap between the dog teeth on the ring and the gear, from the 0.045" (new) down to 0.025" (worn) range. It is not unknown for less than scrupulous rebuilders to skim off the back face to give the appearance of a new ring. The problem here is that this ignores the relationship between the areas shown, A and B, to give the internals of the box their correct clearance.
Qty Req-2, 3rd/4th synchro hub
In stock
Most express orders ship today!
£13.60 ex VAT
£16.32 inc UK VAT
Quantity
24
Synchro Ring Early TR boxes used rings made of “Iron Bronze”, a sintered metal containing copper and iron predominately. This provided synchronising (of sorts) and long life. The brass compounds used these days offer improved synchronising, though nowhere near that of modern gearboxes.  In reality the actual ring size and friction area are inadequate.  The working life of the ring is indicated externally by the gap between the dog teeth on the ring and the gear, from the 0.045" (new) down to 0.025" (worn) range.  It is not unknown for less than scrupulous rebuilders to skim off the back face to give the appearance of a new ring. The problem here is that this ignores the relationship between the areas shown, A and B, to give the internals of the box their correct clearance.
Qty Req-2, 3rd/4th synchro hub
In stock
Most express orders ship today!
£31.00 ex VAT
£37.20 inc UK VAT
Quantity
25
Includes balls, springs and shims
Qty Req-1, alternative to 509649
In stock
Most express orders ship today!
£89.00 ex VAT
£106.80 inc UK VAT
Quantity
In stock
Most express orders ship today!
£0.77 ex VAT
£0.92 inc UK VAT
Quantity
28
Qty Req-3, use in 509649 hub
In stock
Most express orders ship today!
£2.55 ex VAT
£3.06 inc UK VAT
Quantity
28
Qty Req-3, use in 153844 hub
In stock
Most express orders ship today!
£0.77 ex VAT
£0.92 inc UK VAT
Quantity
29
Qty Req-a/r, spring tension adjusting
In stock
Most express orders ship today!
£1.40 ex VAT
£1.68 inc UK VAT
Quantity
30
Never try to reuse an old 55707 circlip
Qty Req-1, retaining third gear
In stock
Most express orders ship today!
£6.50 ex VAT
£7.80 inc UK VAT
Quantity
31
Qty Req-1, alternative to 156136
In stock
Most express orders ship today!
£40.50 ex VAT
£48.60 inc UK VAT
Quantity
32
Qty Req-1, third gear
In stock
Most express orders ship today!
£28.75 ex VAT
£34.50 inc UK VAT
Quantity
32
The bush part no. 153238, may be considered uprated and can be used to replace 129940
Qty Req-1, third gear
In stock
Most express orders ship today!
£24.75 ex VAT
£29.70 inc UK VAT
Quantity
Usually in stock at our supplier, allow 1 week for delivery
£149.00 ex VAT
£178.80 inc UK VAT
Quantity
34
Qty Req-1, second gear
In stock
Most express orders ship today!
£43.50 ex VAT
£52.20 inc UK VAT
Quantity
35
The brass second gear bush used to 1973 often breaks where its flange joins the cylindrical body. This breakage leads to excessive end float in the second and third gears, which in turn causes severe and rapid mechanical failure. A two piece steel bush and thrust washer is offered as an uprated replacement for the one piece brass item. The two piece steel bush set can not be used to replace the steel top hat shaped bush of the post 1973 gearboxes.
Qty Req-1, second gear
In stock
Most express orders ship today!
£48.00 ex VAT
£57.60 inc UK VAT
Quantity
In stock
Most express orders ship today!
£152.50 ex VAT
£183.00 inc UK VAT
Quantity
In stock
Most express orders ship today!
£12.50 ex VAT
£15.00 inc UK VAT
Quantity
In stock
Most express orders ship today!
£12.30 ex VAT
£14.76 inc UK VAT
Quantity
In stock
Most express orders ship today!
£10.80 ex VAT
£12.96 inc UK VAT
Quantity
In stock
Most express orders ship today!
£11.40 ex VAT
£13.68 inc UK VAT
Quantity
In stock
Most express orders ship today!
£11.90 ex VAT
£14.28 inc UK VAT
Quantity
39
Synchro RingTriumph gearboxes originally used rings made of “Iron Bronze”, a sintered metal containing copper and iron predominately. This provided synchronising (of sorts) and long life. The brass compounds used these days offer improved synchronising, though nowhere near that of modern gearboxes. In reality the actual ring size and friction area are inadequate. The working life of the ring is indicated externally by the gap between the dog teeth on the ring and the gear, from the 0.045" (new) down to 0.025" (worn) range. It is not unknown for less than scrupulous rebuilders to skim off the back face to give the appearance of a new ring. The problem here is that this ignores the relationship between the areas shown, A and B, to give the internals of the box their correct clearance.
Qty Req-2, 1st/2nd synchro hub
In stock
Most express orders ship today!
£13.60 ex VAT
£16.32 inc UK VAT
Quantity
39
Synchro Ring Early TR boxes used rings made of “Iron Bronze”, a sintered metal containing copper and iron predominately. This provided synchronising (of sorts) and long life. The brass compounds used these days offer improved synchronising, though nowhere near that of modern gearboxes.  In reality the actual ring size and friction area are inadequate.  The working life of the ring is indicated externally by the gap between the dog teeth on the ring and the gear, from the 0.045" (new) down to 0.025" (worn) range.  It is not unknown for less than scrupulous rebuilders to skim off the back face to give the appearance of a new ring. The problem here is that this ignores the relationship between the areas shown, A and B, to give the internals of the box their correct clearance.
Qty Req-2, 1st/2nd synchro hub
In stock
Most express orders ship today!
£31.00 ex VAT
£37.20 inc UK VAT
Quantity
Synchro Ring Early TR boxes used rings made of “Iron Bronze”, a sintered metal containing copper and iron predominately. This provided synchronising (of sorts) and long life. The brass compounds used these days offer improved synchronising, though nowhere near that of modern gearboxes. In reality the actual ring size and friction area are inadequate. The working life of the ring is indicated externally by the gap between the dog teeth on the ring and the gear, from the 0.045" (new) down to 0.025" (worn) range. It is not unknown for less than scrupulous rebuilders to skim off the back face to give the appearance of a new ring. The problem here is that this ignores the relationship between the areas shown, A and B, to give the internals of the box their correct clearance.

Click on part number to view kit contents
Qty Req-2
In stock
Most express orders ship today!
£94.00 ex VAT
£112.80 inc UK VAT
Quantity
In stock
Most express orders ship today!
£0.77 ex VAT
£0.92 inc UK VAT
Quantity
43
Qty Req-3, use in 515650 hub
In stock
Most express orders ship today!
£2.55 ex VAT
£3.06 inc UK VAT
Quantity
43
Qty Req-3, use in 153843 hub
In stock
Most express orders ship today!
£0.77 ex VAT
£0.92 inc UK VAT
Quantity
44
Qty Req-a/r, spring tension adjusting
In stock
Most express orders ship today!
£1.40 ex VAT
£1.68 inc UK VAT
Quantity
In stock
Most express orders ship today!
£12.50 ex VAT
£15.00 inc UK VAT
Quantity
In stock
Most express orders ship today!
£12.30 ex VAT
£14.76 inc UK VAT
Quantity
In stock
Most express orders ship today!
£10.80 ex VAT
£12.96 inc UK VAT
Quantity
In stock
Most express orders ship today!
£11.40 ex VAT
£13.68 inc UK VAT
Quantity
In stock
Most express orders ship today!
£11.90 ex VAT
£14.28 inc UK VAT
Quantity
46
Qty Req-1, first gear
In stock
Most express orders ship today!
£28.75 ex VAT
£34.50 inc UK VAT
Quantity
46
The bush part no. 153238, may be considered uprated and can be used to replace 129940
Qty Req-1, first gear
In stock
Most express orders ship today!
£24.75 ex VAT
£29.70 inc UK VAT
Quantity
In stock
Most express orders ship today!
£38.50 ex VAT
£46.20 inc UK VAT
Quantity
48
Qty Req-1, between first gear & bearing
In stock
Most express orders ship today!
£43.50 ex VAT
£52.20 inc UK VAT
Quantity
Customer Comments
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Product Description

Triumph TR3B (TCF) TR4-4A-5-250 Mainshaft Gears - 4 Synchro
Synchro Ring Early TR boxes used rings made of “Iron Bronze”, a sintered metal containing copper and iron predominately. This provided synchronising (of sorts) and long life. The brass compounds used these days offer improved synchronising, though nowhere near that of modern gearboxes.  In reality the actual ring size and friction area are inadequate.  The working life of the ring is indicated externally by the gap between the dog teeth on the ring and the gear, from the 0.045" (new) down to 0.025" (worn) range.  It is not unknown for less than scrupulous rebuilders to skim off the back face to give the appearance of a new ring. The problem here is that this ignores the relationship between the areas shown, A and B, to give the internals of the box their correct clearance.

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