Bonnie has overdrive[8D]
I started stripping the old box out on Wednesday afternoon after I'd dropped the prop off to be shortened and by the end of the day everything was ready to take the loverly 'D' type OD box

The clutch plate needed swapping as the OD input shaft is coarse splined as opposed to the original fine splined one, the clutch looked virtually new so just the plate was changed (got a good spare for Harvey now

) but I was most surprised to find that there was no spigot bearing in the end of the crankshaft not a trace of it[:0] I'd intended putting a new one in anyway so it just made the job easier but I wondered how long the input shaft bearings would have lasted if I had just run with the old box.
Thursday morning was spent fitting the new box - on my back with Bonnie up un the hydraulic ramps but in the low position which was just the right height to grapple with the hefty lump of metal. Tail of gearbox balanced on my knee and a good old shove up and a wiggle and in it went, I was quite surprised as I'd lined it up with a socket extension

Everything was bolted up by lunchtime and after confirming that the prop was ready I went to collect it, fitted it and filled with oil by mid afternoon - I spent the rest of the day and most of the next trying to get the exhaust to seal on the down pipe, I've got the scars to prove it:I
After a quick test run to make sure everything worked it was time for the electrics (this is where Bernie comes in). I bought a Humber OD column switch when I was fitting Harvey's overdrive but abandoned the attempt in favour of a gear knob switch when I couldn't get the relay to work but I wanted to have another go on Bonnie and Bernie made up one of his patented relay units for the job[^]. I mounted the switch on the same side as the indicator stalk as it got in the way of the gear stick on the other side.
I made a cowling out of a piece of plastic drain pipe
but need to finish it off around the stalk
I didn't want to drill the dash so Bernie just happened to have this nice little bracket for the warning light
Bernie arrived this morning armed with his box of tricks and we set about fitting it, damn that man is good and it was all fitted in short time (after a trip to Halfords to get some spade ends, an electrician without spade ends - what's that all about

) Anyway is was time for a test run, anxiously changed up from first to second, into third and a flick of the switch produced a sweet slick change into OD - into fourth the another flick resulted in another smooth transition and that lovely reduction in engine revs

Bernie's system worked straight out of the box, what can I say - thanks mate[^]
Summer's Coming