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FE-FC Holden Discussion Forum > Technical Board > General Technical (Moderators: RET, Glenn 'Stinky' Stankevicius, gp) > Grey Gearbox Syncro fix?
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Author Topic: Grey Gearbox Syncro fix?  (Read 4851 times)
Trevor_B
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« on: August 07, 2013, 05:42:52 PM »
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Does anyone know if there has been an issue with syncro ring retaining circlips?

I am rebuilding a spare box and found both syncro ring retaining circlips have been welded in place - I assume to stop them from being pushed out by the sycnro ring?





Was a real pain to remove and the resulting damage to the long gear unit that houses the syncros was terminal  Angry Lucky I have a spare.

Of the many boxes I have worked on, I have never seen this - has anyone else?

Cheers,
Trevor_B
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FC Sedan, Ute & Wagon .... only a Panel Van required to make the set
Gary C
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« Reply #1 on: August 07, 2013, 05:59:49 PM »
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Trevor I have heard it was a common mod for racing purposes.

Gary.
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fe350chev
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« Reply #2 on: August 07, 2013, 06:11:27 PM »
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I remember the father in law bagging out the holden box compared to his ford consul or some old ford car in comparison. I think it was mainly when towing and up hills etc. Do you want me to ask him?
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Deano

Current Rides: 1958 "Black and White Taxi" FC special Sedan, 1957 FE special Sedan, BA Futura,  2015 VF Commodore, 1956 Austin Tipper Truck
Harv
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« Reply #3 on: August 07, 2013, 06:13:46 PM »
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Common modification for racing crashboxes.

The easy way is to give them a touch with the mig/stick at a few points around the ring. This tends to cause big changes in the temper of the ring, leading to localised cracking and failure. Some nasty pictures of what happens next here:
http://forums.fxfjholden.com/viewtopic.php?f=37&t=2455&p=19277&hilit=braze#p19277


The harder way is to braze it up.

Cheers,
Harv
« Last Edit: August 07, 2013, 06:23:37 PM by Harv » Logged
fe350chev
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« Reply #4 on: August 07, 2013, 06:39:14 PM »
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Found this previously, its pretty bloody comprehensive.

http://www.scribd.com/doc/141577453/FB-EK-HOLDEN-THREE-SPEED-CRASHBOX-ENTHUSIASTS-GUIDE
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Deano

Current Rides: 1958 "Black and White Taxi" FC special Sedan, 1957 FE special Sedan, BA Futura,  2015 VF Commodore, 1956 Austin Tipper Truck
Trevor_B
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« Reply #5 on: August 07, 2013, 07:27:34 PM »
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Looks like you are on the money Harv & Gary.

My one was brazed I think as the weld metal was brassy looking.

I checked your gearbox guide Harv (which is very comprehensive  Smiley ) but didn't see any references to welding but it sure looks like the FX/FJ guys are right into it.

Thanks for the replies.

Trevor_B
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fe350chev
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« Reply #6 on: August 08, 2013, 10:05:52 PM »
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I'm Deano  Wink
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Deano

Current Rides: 1958 "Black and White Taxi" FC special Sedan, 1957 FE special Sedan, BA Futura,  2015 VF Commodore, 1956 Austin Tipper Truck
postman_warren
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« Reply #7 on: August 20, 2013, 03:51:05 PM »
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had my gearbox overhauled the synchro hub  was welded like your we replaced it with a new one   the mechanic told me it was common repair many years ago warren
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