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Hello everyone,
While driving my 53' Manhattan to the south of France, I faced major overdrive issue. There are several symptoms to the problem, and even if I suspect something wrong with the governor or the shift fork switch, I'm far from being comfortable with my diagnostic.
In summary, here are all the issues I noticed.
The problem is intermittent. The overdrive sometime work normally with the gear shifting down and the freewheel working at the deceleration. This looks Ok, except that the gear shift down and the freewheel starts at a lower speed than usual (my OD worked perfectly before the issue appeared).
When the problem appears more severely, the OD does not shift the gear down and the freewheel does not work neither.
When this appends, once I stop the car, it is impossible to engage the reverse gear and the OD manual lock command cannot be actioned.
If I restart the car, the OD works on higher gear and only shifts down if I use the kickdown switch, and this appends on all 3 gears.
The OD can sometime be disengaged by manually actioning the kickdown switch (not really safe when driving I must admit) while moving the car a little bit. This allows to manually lock the OD again and have the possibility to engage the reverse gear.
The only thing I did so far to try to solve the issue is that I replaced the OD relay by a new one, and this did not changed anything to the issue.
Any help you can provide on this issue will be more than greatly appreciated.
Have a great day all.
JJ Tevel
PS: I apologies for not always using the proper words, terms or expressions, but being a Belgian guy and thus with French as mother language doesn't help me in this. I promise I will try to keep improving.....
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