I don't know if I had issues but I just ordered the longer axles from FFR as I fit into a production run where there were issues. I've got the new axles, longer axles, on the car but I'm not on the road nor was I before the change over.
I have been following these IRS issue posts for years. Still putting my MKIV together, it was delivered in July 2010.
If there was a range of dates that FF would fess up to supplying the short shafts that would be great, but i dont see anyone getting that answer as yet.
It is also unclear who at FFR, is the expert on the IRS issues. Since my iRS is all together and I am still working on the build, I would like to knwo if they are ok, AND of the clips in the diff are actually engaged.
I cannot feel the trilobes under the boot, so I may be ok.
How did you get the info that your kit fell into a range of production run dates that had short shafts ?
Mine was delivered in March of 2012 and I had the issue. FFR’s fix was to send out spacers to fit on the outboard end of the axle between the inner hub bearing and the outer CV joint. I didn’t like their solution so purchased the new longer axles. I still have the shorter axles with CV joints and spacers if anyone is interested.
I have one of the last MK3 kits with the pin drive IRS. I’m running the third member and hubs out of an 89 MK8. Have no issues with the axle length and the “C” clips fit normally in their slots.
Hope this helps with the research.
From my research and speaking with FFR, ALL IRS half shafts supplied by them since they starting supplying half shafts with the irs option or complete kit, until shortly after they announced the issue, made the shaft design change and sent out spacers - are suspect.
So approx. 2008 - 2013? There's no definite/detailed tracking, and due to tolerance stack up, the only way to tell if you have the issue is to test, measure and inspect.
If you have shafts supplied by another vendor or 'donor' shafts, you probably or may not have an issue.
This is a shaft length design issue. The design fix was to lengthen the shaft. Thus you can assume all IRS half-shafts from FFR have the 'too short' shaft. This is not something that would be hit and miss (some are short and some are OK)
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