[Fot] Welding of a gearbox casing

[Tim Murphy]

Yes, I had our TR3 gearbox TIG welded by the welder at work and never had
any more problems with it for the next 5 years.  The transmission has the
overdrive unit.  Our newer gearbox uses the much stronger TR6 case.

Tim

-----Original Message-----
From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of Van Mulders
Marcel
Sent: Tuesday, October 21, 2014 4:51 PM
To: fot at autox.team.net
Subject: [Fot] Welding of a gearbox casing

In 2 years, I had 4 broken gearbox casing : maybe one of these can be
repaired : it has a crack where the bottom of the gear casing and the rear
wall  are mating. Considering the weight of the engine and gearbox, the
stresses at that point must be very high : the 4 cylinder TR's have 2
mountings at the front of the engine and 1 mounting at the gearbox
extension. A gearbox with overdrive has this rear mounting at the very end
of this extension : the shearing force between casing and extension must be
very high, one should think that the rear wall of the casing should be
pulled out all the time in racing. Has someone tried welding a gearbox
casing?
Marcel
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