Someone asked how to identify speedos for overdrive and non-overdrive
TR4s. As has already been explained, what matters is not OD vs non_OD, but
what diff ratio you have. Here are the Triumph part numbers from the
factory parts catalog. On most original speedos the Triumph part number
and the British Jaeger part number are both on the speedo face near the
needle pivot point.
Keep in mind that any Smiths/British Jaeger speedometer can be
recalibrated to suit your diff ratio and tire size. It may not be worth
the effort to find an original that may well have to be rebuilt anyway.
Part # Description Tire Size Diff Application
------ --------------- --------- ----- -------------------------
208062 Speedometer MPH 550/590X15 3.7:1 To body # 15053CT (RHD) &
commission # CT11307 (LHD)
208063 Speedometer KPH 550/590X15 3.7:1 To body # 15053CT (RHD) &
commission # CT11307 (LHD)
209182 Speedometer MPH 550/590X15 3.7:1 From body # 15054CT (RHD) &
commission # CT11308 (LHD)
209183 Speedometer KPH 550/590X15 3.7:1 From body # 15054CT (RHD) &
commission # CT11308 (LHD)
208066 Speedometer MPH 550/590X15 4.1:1 To body # 15053CT (RHD) &
commission # CT11307 (LHD)
208067 Speedometer KPH 550/590X15 4.1:1 To body # 15053CT (RHD) &
commission # CT11307 (LHD)
209184 Speedometer MPH 550/590X15 4.1:1 From body # 15054CT (RHD) &
commission # CT11308 (LHD)
209185 Speedometer KPH 550/590X15 4.1:1 From body # 15054CT (RHD) &
commission # CT11308 (LHD)
208655 Speedometer MPH Michelin X 3.7:1 To body # 15053CT (RHD) &
165 X 15 commission # CT11307 (LHD)
208656 Speedometer KPH Michelin X 3.7:1 To body # 15053CT (RHD) &
165 X 15 commission # CT11307 (LHD)
209188 Speedometer MPH Michelin X 3.7:1 From body # 15054CT (RHD) &
165 X 15 commission # CT11308 (LHD)
209189 Speedometer KPH Michelin X 3.7:1 From body # 15054CT (RHD) &
165 X 15 commission # CT11308 (LHD)
208657 Speedometer MPH Michelin X 4.1:1 To body # 15053CT (RHD) &
165 X 15 commission # CT11307 (LHD)
208658 Speedometer KPH Michelin X 4.1:1 To body # 15053CT (RHD) &
165 X 15 commission # CT11307 (LHD)
209186 Speedometer MPH Michelin X 4.1:1 From body # 15054CT (RHD) &
165 X 15 commission # CT11308 (LHD)
209187 Speedometer KPH Michelin X 4.1:1 From body # 15054CT (RHD) &
165 X 15 commission # CT11308 (LHD)
-----------------------------------------------------------------------
Chip Old 1948 M.G. TC TC6710 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO
fold@bcpl.net
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