[Fot] Welding of a gearbox casing

[John Styduhar]

Yes the case can be TIG welded but there may be shrinkage in the front or
rear bearing ports if the weld is near these openings.  I have an early TR2
trans and A-type OD and found a hairline crack nearly the entire
circumferance between the bellhousing and gear case .  I had an experienced
welder weld the entire crack and weld aluminun reinforcing pieces from the
casting boss on each side of the case to the bellhousing.  Later
transmissions do not have these bosses. The front bearing was very
difficult to remove when I got the tranny back but I was able to drive it
out from inside the case.

On Tue, Oct 21, 2014 at 5:50 PM, Van Mulders Marcel <
van.mulders.marcel at telenet.be> wrote:

> 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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