[Fot] early TR3 input shaft question

[Steve Yott]

Bob,
I think you will end up with a "frankenbox" but it may work.  The early cars
did use a bronze bushing in place of the caged bearing. The loads on the
bushing or bearing in this area are not severe and I think a bushing would
last a good long time but there must have been a reason for the change.

The bearing outside diameter is 1.125" so you could make a bronze bushing to
fit the hole in the input shaft and size it for a slight press in fit.  The
inner diameter hole should be about .002" larger than the snout on your new
mainshaft.  The issue and concern will be the total length and alignment
with the gears.  I would gather all the parts, lay it out and do some close
measuring to ensure everything lines up properly.

Could work, good luck!

Steve Yott

-----Original Message-----
From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of
rkramer3 at austin.rr.com
Sent: Tuesday, August 18, 2015 7:28 AM
To: FOT
Subject: [Fot] early TR3 input shaft question

I have an early TR2/3 non-synchro first gear overdrive tranny that I am
rebuilding. The mainshaft was trashed so I bought one on eBay but it is
different in an important way. The old one was similar to the ones that I'm
used to seeing in a TR4, the input shaft rides on a caged set of rollers on
the snout of the mainshaft. This early one, according to the Moss catalog,
takes a $39.00 bushing on a much smaller diameter bearing surface. It is
also longer which I think is an important difference requiring an early
input shaft that I don't have. Does anyone know if the diameter of the early
style TR2/3 bushing mates up to the inside of the later input shaft diameter
with the bearing removed? I figure I can trim off a bit of the mainshaft and
bushing and make it work if the bushing mates to the later input shaft.

Bob Kramer
rkramer3 at austin.rr.com
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