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  1. vmaxjude

    Unusual whistling sound from the diff area on my 2020 GT

    Hi all. I have just started to notice a not particularly loud sort of low whistling sound (it's hard to really describe it tbh) coming from the diff area of my GT. I have had the bike checked out by my local Triumph dealer (I am in the UK) while having a new front tyre and pads fitted and they...
  2. Chariot

    Rocket3 Roadster Trike - Differential ratio question

    Is there anyone out there who is knowledgeable about the ford sierra diff commonly used in UK trikes built since the Rocket3 was introduced. My problem is I think my trike is pulling too high a gear through the diff. We measured the ratio at 3.125, could possibly have been 3.2. This ratio...
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