tdskip said:
1) This very early crash box (possible from a TR3A even) has a different style connector that the later cars. Can it be replaced with a later sensor?
Yes, from a 3A before 1960. Yes, later switch will work fine, just add suitable terminals to the wire.
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]2) One this gearbox there are two sensors, is the front one or the back one the reverse sensor?[/QUOTE]Neither one, they are both for the OD. One will close when in either 3rd or 4th; the other closes when in 2nd. Switches are wired in parallel, so OD is available in 2nd, 3rd or 4th.
Note that the book talks about the washers under the switch being important to 'time' the OD engagement. Not sure how important it actually is, but why take a chance?