Well, I've made some progress, learned a bunch never having done this
before. Got the rear extension and bell housing off. Got the input
shaft out. Got the reverse idler shaft out, and the layshaft.
It's been interesting trying to follow the instructions. I'm using
the 3-rail gearbox section of the Haynes Spitfire book. I checked my
Bentley manual, which is for the 1500 only. Sinlge-rail or 3, it has
so little detail that it would have been mostly useless. But the
Haynes manual doesn't quite agree with my gearbox either. Maybe the
GT6 box is sufficiently different, or the box changed a bit from
early to late 3-rail versions. For example:
The manual says to remove the top by removing the eight bolts, and
note which is the long one. Sure, there were eight bolts but none
was longer. But there are actually nine holes, one being empty.
The manual says to lift the reverse idler gear out. But the gear
clears neither the gear behind it on the output shaft nor the cluster
gear. And anyway, it is too large to come through the hole at the
back end of the gearbox shell, which I discovered after I removed the
reverse idler shaft.
The manual did not mention a pin bolt on the reverse idler shaft, but
there is one. And I thought (I'm starting to forget what it says!)
it said there was a pin bolt holding the layshaft, but there wasn't.
There were three springs through the front of the gearbox shell, held
in place by the bell housing and apparently exerting pressure on a
thrust plate at the front of the layshaft. These were not mentioned
in the manual. The layshaft lifted out easily from the back. I do
hope it will go back in as easily! Well, all those parts went in
once before so it can't be too hard.
So far I see nothing untoward, nothing obviously broken, no broken
input bearing visible on casual inspection, no broken teeth. As I
take the various gears out I expect to see a worn bearing at least on
something related to 2nd. That must wait for tomorrow...
Is there anything in particular I should be looking for? Some
measurement that is more critical that others? Sure is some pretty
brass in there.
Tanks!
--
Jim Muller
jimmuller@rcn.com
'80 Spitfire, '70 GT6+
_______________________________________________
Support Team.Net http://www.team.net/donate.html
This list supported in part by the Vintage Triumph Register
http://www.vtr.org
Triumphs@autox.team.net
http://autox.team.net/mailman/listinfo/triumphs
http://www.team.net/archive
|