I've driven the TR3A's Type A Overdrive for almost 15,000 miles now, but the OD
now fails to engage. Suspecting electrical, I was able to get it to engage
intermitently. Now not at all.
Tonight I disassembled the transmission housing to get at the solenoid, so I
could be sure I was getting actuation. Apparently not. The solenoid was
toast, melted on top with the upper wire no longer solidly connected (hence the
intermitency).
Clearly it overheated. Since this was a brand new solenoid from one of the Big
3, it was (ostensibly) set to correct tolerances from the factory. Indeed, it
did work fine for about 15K miles.
What did I do wrong? My guess is this thing was drawing the 15 amps all the
time, instead of the brief moment to actuate.
Terry Smith, '59 Tr3A
New Hampshire
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