Or maybe someone just swapped the top from an earlier gearbox with the
dip-stick onto this one. I know that a late TR3A (TS 81551 L) that I
restored had no dip-stick. My own 1958 TR3A (TS 27489 LO) has the
dip-stick.
----- Original Message -----
From: "Randall" <tr3driver@ca.rr.com>
To: <fot@autox.team.net>
Sent: Sunday, March 09, 2008 4:35 PM
Subject: Re: [Fot] TR4-6 trans into TR3
>> I have been carting around a TR3B transmission for three
>> decades assuming some day I would put it in my TR3 for the
>> synchro. It does infact have the dipstick hole but I remember
>> driving the car (TR3B) and liking the synchro before I parted
>> it out when they were worthless ($500). Do you think there
>> were cross over years?
>
> I don't believe so. The dipstick was deleted several years before the 4
> synchro box was created (at the same time the main casting was changed to
> accommodate the later starter, at TS50000); and if I recall correctly,
> later
> 3As didn't even have the hole in the tunnel to access the dipstick. But
> as
> I mentioned, it's easy to adapt the dipstick top cover to the later box;
> possibly someone knew that even 30 years ago ?
>
>> Any other tips from the outside that
>> its a synchro,
>
> The 4-synchro box has a large cylindrical bulge on the LH side, right
> behind
> the fill plug.
>
>> will it take the overdrive unit from my
>> older non-synchro transmission if I ever get motivated to
>> exchange it?
>
> You'll need the OD mainshaft to match the gearset in the box (meaning a
> different shaft between 3-synchro and 4-synchro). The adapter plate also
> changed slightly, but I believe the early plate can be modified to fit the
> later box by removing some metal with a die grinder (to clear the end of
> the
> countershaft). But since the early plates were somewhat weak anyway and
> prone to leak; it might be better to just buy one of John Esposito's
> uprated
> plates.
>
> Randall
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