If memory serves (no guarantees), the TR4A was the first of the big
Triumphs to use a scissors jack. The change was necessary because the
frame rail was no longer in the right place relative to the hole in the
floor thanks to the drastically redesigned chassis frame. Switching to a
different type of jack was probably cheaper than retooling for new floor
pans. Considering how flimsy the scissors jack is, Triumph obviously
didn't waste a lot of money on it...
On Sat, 2 Nov 1996, K.R. Stewart wrote:
> Sorry if this has already been said but I get the digest and
> won't know until tomorrow. In answer to the question about the
> use of original jack on the TR3, John Haynes indicated that the
> hole was not necessary on the TR4 thru TR6 series. This is only
> partially correct.
>
> My 1962 TR4 (CT6716LO) came with one of these ratchet style
> jacks that could be used inside the car. The TR4 frame has a
> bracket just below this hole into which the 'arm' on the side of
> the jack is inserted. The owner's manual (& reprints and Bentley
> reprints) show pictures of this jack in use. Later, these cars
> changed over to the scissors type jack but obviously, there was
> no need to change the floor pans. Since the TR 5 (250) and TR6
> models also used these floor pans, economies (read cost of
> production changes) indicated that the holes should continue.
-----------------------------------------------------------------------
Chip Old 1948 M.G. TC TC6710 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO (daily driver)
fold@mail.bcpl.lib.md.us
If cars had evolved as fast as computers have, by now they'd cost a
quarter, run for a year on a half-gallon of gas, and explode once a day.
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