> Only the TR2-4 use the longer cable and have a notch in the floorpan and a
> special rubber boot to accomodate it. The TR4A introduced the use of the
> gearbox and the floorpan on longer included the cut-out for the cable to
> angle straight out of the gearbox.
Well ... I won't speak for the TR6, since I'm not entirely certain
(well, I wasn't, but do read on), but the 4A definitely uses a
longer speedo cable for overdrive than for non-overdrive. Since the
TR6 gearbox is the same unit (at least the early, A-type O/Ds are)
and the speedometer is in the same place, I'd guess that they do,
too.
The non-OD gbox has the speedo drive on the left side of the
tailshaft. The OD gbox has the speedo drive on the right side -
the solenoid is on the left side. The cable is routed across the
top of the gearbox, fastened with some Adel-style clamps to the top
cover bolts.
The OD cable p/n is 504948 (/I for inner, /O for outer). Ah, that's
for the 4A; for the 6, I see that the p/n is 516545. And yes, you
need a right angle box, p/n 120694. (Hmm, why a different part?
Did they switch the speedo/tach location *again*?)
I don't have accurate length information for LHD cars. But I note
that the Moss UK catalog specs a 69" cable for "all cars with O/D"
(not true) as well as the LHD standard gearbox, and a 78" for a RHD
standard gearbox. Since the cable in a RHD standard car must cross
in much the same way as in an OD box in a LHD car, that might be a
good guess - though the RHD standard setup doesn't seem to use a
right angle drive! Curious.
TRF should be able to supply you the right cable, or at the very
least, the required length. Call their tech support line.
chris
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