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from "TVS" <
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> Just got my late 2A SWB thought its first MOT after a complete chassis up
> rebuild. just! I've put an untested series 3 gearbox in but its whining like
> a nasty thing in reverse. I rejected another s3 box because when I drove
> that, it was exactly the same! Through out the forward gears its very nice,
> even the synco is good. What's this likely to be? I'm sure this isn't a
> trate of all series 3 boxes though! I'm hoping it will last till at least
> early next year as I don't have time to swap the gearbox again and the
> weather isn't on my side ether.
> Thanks!
One of the shafts is prone to wear, it's a bit offset so going forward
it tends to push everything together, in reverse it tends to push apart,
after it wears a bit it whines, one of Sons Siii whined for about 5
years in reverse before it gave up the ghost, bits of synchro in the oil
etc, only 2 gears some of the time etc. etc.
Towing in reverse or pulling out a log, or stuck vehicle in reverse
usually shags the gear on this shaft pretty effectively.
We also put down some of the excessive wear to a strange gear lever.
the standard lever has a metal ball on the end with a groove round it to
take a rubber "O" ring as a damper, even if the "O" ring goes very
little goes wrong apart from a little chatter from the vibrating gear
lever.
The alternate lever has an end with a recess about half an inch long cut
into the rod, no bulge of metal at all, with about a tenth of an inch of
rod at the end, onto this fits a big round bobbin, bit like a cotton
reel, made of plastic which breaks-wears away-dissapears (I have never
actually seen a complete one so I am extropolating a bit), once gone the
lever never quite articulates enough to push the gear completely right
home, and the gearbox wear rate increases substantially. Looks as
follows after bobbin goes missing
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It looks as if the bobbin is either in two parts glued together or it is
pushed on and the end of the lever spread in a press. anyway there is no
obvious way of replacing a worn bobbin.
--
If you received this through the miracle of modern technology then all
is well; if not then situation normal.
Chris father of

( also at
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www.users.zetnet.co.uk/barnes_firsnorton