I think that most of us who race the bit TR-s have gone to the
diaphragm clutch like on a TR4a. The ones with fingers have been
known to come apart at high RPM and are a good test of the tensile
strength of the scatter shield or of your feet. That's not a part I
care to test.
Tony Drews
At 05:21 PM 7/2/2014, Glenn Franco wrote:
>Thanks all for the input on A-Type (Box O Parts) Overdrive testing
>and Release bearing sleeve.
>Trans and O/D work fine (leaks a little-bad Moss part) Swapped out
>the release bearing sleeve for the bronze one from the TR4.
>Everything works OK at this point.
>I can confirm that the TR4 has a shorter bronze sleeve than the TR6
>and the TR4 uses a Borg & Beck coil spring 3 finger Clutch Cover or
>pressure plate.
>Glenn
>
>>>Group
>>>I'm trying to bench test an A type that I overhauled this past
>>>winter from a box of parts.
>>>I also have an A type that I took out of a 71 TR6 that I would
>>>like to test before using them in any cars.
>>>
>>>1st dumb question
>>>What do you think the minimum input shaft speed needs to be to
>>>allow the O/D to engage.
>>>
>>>I fabricated an adapter from a clutch hub and various pieces of
>>>steel on a lathe to drive the trans from the input shaft.
>>>
>>>I'm spinning the adapter with a large 1/2 inch drill but the max
>>>drill speed is only a little over 500 RPM which is probably not enough.
>>>
>>>I get oil flow up the operating valve when the plug is removed but
>>>no engagement. This is the result of spinning both transmissions.
>>>
>>>Any suggestions/more RPM's
>>>Thanks Glenn
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