Classic cars forum & vehicle restoration.
|
|
| Author |
Message |
peter scott
Joined: 18 Dec 2007
Posts: 7118
Location: Edinburgh
|
 Posted: Fri Feb 10, 2023 6:42 pm Post subject: |
 |
|
| peter scott wrote: | Is there some way in which the external gear change links could engage two gears simultaneously?
Peter. |
Bingo! 
_________________
http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
|
| Back to top |
|
 |
norustplease
Joined: 11 Apr 2011
Posts: 779
Location: Lancashire
|
| Posted: Sat Feb 11, 2023 10:11 am Post subject: |
|
|
The cause of the fault is one of the most common issues with this box. There is engineering view that the bushing for the 2nd/reverse cluster is inadequate anyway, although, just as quite a few gearboxes fail, there are others that carry on almost indefinitely. The long term cure is either to bond the bushes in place with one of the modern Loctite type variants, or have a single bush drilled for an oilway after installation. However, this is complex, because original bushes have a spiral groove which 'winds' oil along the shaft as the cluster rotates.
It does seem a shame that over the model's lifespan, Citroen never got around to developing a more robust gearbox.
_________________
1953 Citroen Traction
1964 Volvo PV544
1957 Austin A55 Mk 1
Boring Tucson SUV |
|
| Back to top |
|
|
Ray White
Joined: 02 Dec 2014
Posts: 6316
Location: Derby
|
| Posted: Sat Feb 11, 2023 11:36 am Post subject: |
|
|
| norustplease wrote: | The cause of the fault is one of the most common issues with this box. There is engineering view that the bushing for the 2nd/reverse cluster is inadequate anyway, although, just as quite a few gearboxes fail, there are others that carry on almost indefinitely. The long term cure is either to bond the bushes in place with one of the modern Loctite type variants, or have a single bush drilled for an oilway after installation. However, this is complex, because original bushes have a spiral groove which 'winds' oil along the shaft as the cluster rotates.
It does seem a shame that over the model's lifespan, Citroen never got around to developing a more robust gearbox. |
As an aside (which you may be familiar with)
this idea of a scroll type bush can also be found in axles and half shafts, but used in reverse; to act as an oil retainer. Unfortunately, although the bush doesn't move as in your gearbox, as it wears, it's effectiveness is reduced and oil finds it's way onto the brake linings. 
What you have shown us is that a problem that might frighten others into handing everything over to an expert can be done by the determined home mechanic. Well done.! |
|
| Back to top |
|
|
norustplease
Joined: 11 Apr 2011
Posts: 779
Location: Lancashire
|
| Posted: Tue Feb 21, 2023 1:33 pm Post subject: |
|
|
Still not quite there, a couple of minor jobs to complete and some paintwork on the bonnet lid around one of the catches. Weather, however, is still uncertain in classic motoring terms, so I don't think that I am missing anything. The Austin needs a run, so that is next on the list next time the sun shines on dry roads. I will try and get back on the road by the next St Catherines Sunday meet in March. Worth a visit, incidentally, if you are looking for a morning out, second Sunday of the month at Lostock Hall near Preston.
_________________
1953 Citroen Traction
1964 Volvo PV544
1957 Austin A55 Mk 1
Boring Tucson SUV |
|
| Back to top |
|
|
norustplease
Joined: 11 Apr 2011
Posts: 779
Location: Lancashire
|
| Posted: Thu Mar 09, 2023 6:09 pm Post subject: |
|
|
Back in one piece again, Short test drive shows everything seems to work albeit change down into second is a bit stiff. Hopefully this will loosen up a bit after a few miles. Arctic conditions now are keeping the car in its garage, but hopefully things will improve and permit a longer drive before too long.
_________________
1953 Citroen Traction
1964 Volvo PV544
1957 Austin A55 Mk 1
Boring Tucson SUV |
|
| Back to top |
|
|
norustplease
Joined: 11 Apr 2011
Posts: 779
Location: Lancashire
|
| Posted: Wed Feb 21, 2024 12:17 pm Post subject: |
|
|
Out on a grey New Year's Day, next to one of its kin having a rolling restoration.
_________________
1953 Citroen Traction
1964 Volvo PV544
1957 Austin A55 Mk 1
Boring Tucson SUV |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
php BB powered © php BB Grp.
|
FAQ
Search
Memberlist
Usergroups
Profile
Log in to check your private messages
Log in
