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Pot & Trunnion Propshaft Repair?

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Pot & Trunnion Propshaft Repair?
Chris KC Offline
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#1
22-11-2017, 11:18 AM
Not long ago I acquired a couple of 4-speed crash gearboxes, one of which had a fabric-joint propshaft still attached. The trunnion end is badly corroded, but being from a lwb car the shaft could easily be shortened for use in a swb. The block on the end which houses the pin would have to be rebuilt though. I can imagine several ways one might go about this but have doubts about strength / durability. Does anyone have practical experience of 're-making' the lump on the tail end of the propshaft?
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Tony Press Offline
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#2
22-11-2017, 09:56 PM
(22-11-2017, 11:18 AM)Chris KC Wrote: Not long ago I acquired a couple of 4-speed crash gearboxes, one of which had a fabric-joint propshaft still attached. The trunnion end is badly corroded, but being from a lwb car the shaft could easily be shortened for use in a swb. The block on the end which houses the pin would have to be rebuilt though. I can imagine several ways one might go about this but have doubts about strength / durability. Does anyone have practical experience of 're-making' the lump on the tail end of the propshaft?

There must be a few tailshafts about - why try ? Given the drive loads I would think the 
pot joint would be very difficult to repair well.

Cheers, Tony.
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Chris KC Offline
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#3
23-11-2017, 11:20 AM
The 'why' is very simple Tony - I don't want to toss another original Austin Seven part in the hedge if it is known that this can be fixed...
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Tony Press Offline
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#4
23-11-2017, 10:23 PM
(23-11-2017, 11:20 AM)Chris KC Wrote: The 'why' is very simple Tony - I don't want to toss another original Austin Seven part in the hedge if it is known that this can be fixed...


I appreciate your commitment to conservation but with a whirling steel bar under the seat I would want to be sure it was solid as designed.

Cheers, Tony.
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Chris KC Offline
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#5
24-11-2017, 10:54 AM (This post was last modified: 24-11-2017, 10:54 AM by Chris KC.)
(23-11-2017, 10:23 PM)Tony Press Wrote:
(23-11-2017, 11:20 AM)Chris KC Wrote: The 'why' is very simple Tony - I don't want to toss another original Austin Seven part in the hedge if it is known that this can be fixed...


I appreciate your commitment to conservation but with a whirling steel bar under the seat I would want to be sure it was solid as designed.

Cheers, Tony.

Yes, hence my query
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AustinWood Offline
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#6
24-11-2017, 02:28 PM
And also why I've fitted an A7 Components Hardy-Spicer shaft.
Much less vibration as well, vibro-massage through the seat gone!
Jim
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Ruairidh Dunford Offline
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#7
24-11-2017, 02:45 PM
(24-11-2017, 02:28 PM)AustinWood Wrote: And also why I've fitted an A7 Components Hardy-Spicer shaft.
Much less vibration as well, vibro-massage through the seat gone!

I second that recommendation - great bit of kit.
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Steve Jones Online
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#8
24-11-2017, 04:14 PM
(24-11-2017, 02:45 PM)Ruairidh Dunford Wrote:
(24-11-2017, 02:28 PM)AustinWood Wrote: And also why I've fitted an A7 Components Hardy-Spicer shaft.
Much less vibration as well, vibro-massage through the seat gone!

I second that recommendation - great bit of kit.

And I third it!! About the best positive change you can make to any Austin 7 is to change to a Hardy Spicer propshaft. As well as being much smoother in operation, it actually makes the car go faster as you no longer back off as it tries to shake itself to bits at about 42mph Big Grin

Steve
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Chris KC Offline
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#9
24-11-2017, 05:45 PM
All the above understood and appreciated gents - indeed I have had a (shortened) Hardy Spicer shaft in my own car for many years.
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Mike Costigan Offline
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#10
24-11-2017, 06:14 PM
Some of you guys must have very worn joints!

I've run numerous short-chassis cars over the last fifty years ranging from newly rebuilt to very, very worn out, and have never had a vibration problem like that. Oh, what have I missed  Huh
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