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<div dir="ltr" data-setdir="false">Thanks Tom. I have the original transmissions from my TR-2 and TR-3 sitting in my garage. I just measured the thickness of the flange and it is .360" on both. I don't know what that converts to in millimeters. I assume the early TR-4 was about the same, although the gearbox housing casting was different due to going to the fully synchronized transmission on the TR-4 (and some TR-3B's)</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">As to my original question, I dug out my factory parts books for TR-2 - TR-6 to check the part numbers for the slave cylinder support bracket. Unfortunately, my TR-2 parts book is for TR-2 through TR-3A, and while it shows 2 different part numbers, it doesn't tell when the change was made. So, I think the TR-2 and some of the TR-3's used bracket part number 106701. At some point during the TR-3 run, they changed to part number 128042. Interesting enough that same part number appears in both the TR-4 and the TR-4A parts books. Therefore, once they changed to 128042, they stayed with it for all the rest of the TR-4's and TR-4A's.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">The tr-6 bracket is completely different (it doesn't curve around the bell housing) and it is part number 136353.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">So, that's all I know. If anyone knows when, during the TR-3 run they switched to the 128042 part number, I would like to know. Also, if you have a bracket which you know is for a TR-4 or 4A, please check the measurement between the top holes, as explained in my original email below, and let me know the distance between them.Thanks.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Jack<br></div><div><br></div>
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On Saturday, January 23, 2021, 1:20:43 PM EST, trhouse@columbus.rr.com <trhouse@columbus.rr.com> wrote:
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<div><div id="ydpb9723ed8yiv6442467585"><div>I think you are correct about the TR4 or TR6 the flange on the TR6 bell housing is thicker. I'll check a TR2 / Doretti here in the garage but will be a while till I get to the storage area to check anything else <div><br clear="none"></div><div>New Facebook with confirming early history </div><div><br clear="none"></div><div>https://www.facebook.com/dorhouse1/<br clear="none"><br clear="none"><div class="ydpb9723ed8yiv6442467585reply-new-signature"></div><div class="ydpb9723ed8yiv6442467585yqt0306122145" id="ydpb9723ed8yiv6442467585yqt05401"><p>-----------------------------------------</p>From: "Jack Wheeler via Fot" <br clear="none">To: "FOT Triumph"<br clear="none">Cc: <br clear="none">Sent: Saturday January 23 2021 1:07:23PM<br clear="none">Subject: [Fot] Question<br clear="none"><br clear="none">
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<div dir="ltr">I have a question about the
bracket that the clutch slave cylinder attaches to. This
bracket is attached to the bottom of the bell housing and is
supported by a 5/16" rod that goes from the bottom of this bracket
and attaches to one of the oil pan bolts. Got that so
far?</div>
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<div dir="ltr">I have 2 of these brackets and
they are different. It looks like the difference is in the
hole location and shape. One bracket would appear to locate
the slave cylinder closer to the bell housing than the other.
I assume one of these is for a TR-3, and the other for a TR-4,
although who knows when they made the change. My question is
which is which?</div>
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<div dir="ltr">It looks to me like the best way
to differentiate is the difference in the upper hole location, that
is, the 2 holes at the top of the bracket when installed. One
of my brackets has the top holes approximately 1 5/8" apart on
center. The other bracket has the top holes 1 13/16" apart on
center.</div>
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<div dir="ltr">So does anyone have a bracket
which is known to be for a TR-3 or one known to be for a
TR-4. If so, could you please measure the distance between
the top holes on center? Thanks for your help, and if anyone
has any information about when this was changed (and why), I would
be interested in that.</div>
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<div dir="ltr">Jack Wheeler<br clear="none"></div>
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