Took the Model B gearbox over to my friend John to give it a look over, not surprisingly we found very little wrong with the exception of some damaged threads where the gearbox top mounts
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The Model B into Model A conversion is rarely done and is quite complex meaning quite a bit of research and parts gathering will be required. John has kindly started to gather some of the parts as you can see below.
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An adaptor plate to secure the Model B gearbox to the Model A engine, tailshaft/torque tube adaptor and sheet metal to modify the Model A sump have already been sourced by John. A number of other challenges such as mounting the handbrake, swapping the release arm to LHD, pedal box and radius arm modifications and Flywheel machining just to name a few! A gear lever for the Model B gearbox is on the way.
My friend John Cochran put me in touch with a very nice chap in Scotland named Ian Caldwell who happened to have a Model B gearbox for sale. The Model B gearbox offers the advantage of synchromesh over the Model A by removing the need to double declutch.
In a synchromesh gearbox, to correctly match the speed of the gear to that of the shaft as the gear is engaged the collar initially applies a force to a cone-shaped brass clutch attached to the gear, which brings the speeds to match prior to the collar locking into place.
Now I still need to gather quite a lot of extra parts to effect the conversion, these include a clutch pedal, shift lever. I’ll post the progress!
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