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  #1  
Old 07-10-2017, 01:49 PM
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Whatís this?




Iím at Santa Pod again and something broke - I think itís part of the driveshaft UJ. What do you reckon?
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Old 07-10-2017, 02:12 PM
Nigel Brook Nigel Brook is offline
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yes, looks like one of the driveshaft UJ "spider" couplings. Was it that clean when you picked it up?
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Old 07-10-2017, 02:16 PM
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Thanks Nigel, yep, havenít done anything to clean it up.
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Old 07-10-2017, 05:37 PM
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yep that was a UJ
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Old 07-10-2017, 06:45 PM
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Thanks a bit unfortunate. I know what its like to have things fail as I've been there too many times.

Time for an upgrade?
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Old 07-10-2017, 07:00 PM
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That really sucks having a part failure at an event.

John, what is the upgrade for a driveshaft UJ??? Someone makes a stronger piece I presume?
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Old 07-10-2017, 07:32 PM
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Thanks chaps - If there is an easyish upgrade, I'll take it - but what is it? can I just ask for super strong UJs?
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Old 07-10-2017, 08:29 PM
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if its just a pin could you go to a machinist and ask them to make you a new one?
or is it the complete coupling thats one bang?
interestingly i just googled it and tr4 owners seem to be modifying datsun shafts to fit their own so maybe theres a supplier out there for these parts?
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Old 07-10-2017, 09:56 PM
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That is one problem with Santa Pod. The level of grip is massive so the weak link will give way. I am still using standard shafts on mine and have had about 4 break in the years I have owned it. I believe there is a stronger UJ but cant remember where I have seen them.
Another issue is with all the poly bushes available and fitted these days it takes all the compliance out of the car so therefore the shock loading is far greater as there is no rubber to take up the shocks and strains.
Just my 2 pence worth
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Old 07-10-2017, 10:45 PM
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Quote:
Originally Posted by Jimbo View Post
if its just a pin could you go to a machinist and ask them to make you a new one?
or is it the complete coupling thats one bang?
interestingly i just googled it and tr4 owners seem to be modifying datsun shafts to fit their own so maybe theres a supplier out there for these parts?


Itís a bit of the central cross from the UJ - Iíve had them replaced before so donít think thereís a problem getting a new one fitted by a prop specialist.
Donít suppose that TR4 trick works in reverse 😜
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Old 07-10-2017, 10:51 PM
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Quote:
Originally Posted by ben240z View Post
That is one problem with Santa Pod. The level of grip is massive so the weak link will give way. I am still using standard shafts on mine and have had about 4 break in the years I have owned it. I believe there is a stronger UJ but cant remember where I have seen them.
Another issue is with all the poly bushes available and fitted these days it takes all the compliance out of the car so therefore the shock loading is far greater as there is no rubber to take up the shocks and strains.
Just my 2 pence worth


Today was the first time Iíve walked on the track - I couldnít get over how sticky it was- Iíd imagined it was like normal smooth tarmac.
I reckon the quaife had something to do with it breaking - previously one wheel would have spun. Today it had to spin two!
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Old 07-10-2017, 11:09 PM
SKiddell SKiddell is offline
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Over 200 runs up the pod
Never had a breakage

Must be doing something wrong
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Old 07-10-2017, 11:11 PM
SKiddell SKiddell is offline
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With a Quaife diff as well
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Old 08-10-2017, 08:17 AM
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With a Quaife diff as well


Have you just got a standard prop then Steve? Iíll just replace it with another std UJ then and treat it as a one-off
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Old 08-10-2017, 11:01 AM
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More than just the UJ then: the shaft side yoke too.
Anyone know if this is something a prop shop might be able to replace? You must have broken one someyime John P 😀

It also bent the hand brake bracket a bit and split the fuel line - But they were easy to fix.
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