Definitive 250 gearbox mount solution?

Discussion in 'Mechanical - Engine, Gearbox, Exhaust etc' started by dale.groves, May 9, 2016.

  1. The stud is stronger but main point is that this design does not allow excessive movement of lower bracket relative to the upper one. Hence the stud is not bend/ twisted and not prone to failure. In OEM design excessive movement causes bolt failure, in our opinion.
  2. The stud is stronger but main point is that this design does not allow excessive movement of lower bracket relative to the upper one. Hence the stud is not bend/ twisted and not prone to failure. In OEM design excessive movement causes bolt failure, in our opinion.

    Price - bear with me few more weeks to finish testing and than will advise.
    Last edited: Jun 12, 2017
    tomfry likes this.
  3. Great, very interested as I'm sure others will be. As always it just comes down to price....
  4. Is there any update regarding your improved transmission mount?
  5. I've just fitted the K-Tec stabiliser mount today, which I'm told should stop the top engine mount from sheering as it massively reduces the engine movement.

    Vibrates a bit at idle, but I can definitely feel less movement now and it provides a nicer shift too.
  6. Oh, I also installed that K-tec stabiliser mount while installing new engine mounts with inserts. Do you think I wont be breaking a bolt any time soon (80k miles atm) on track? I really don't want that to happen on the Ring...
  7. I would replace the bolt :tongueout:

    I have had mine done, and i have the dogbone replaced, and yellow engine upper insert
  8. Tried and tested road and track, all good. Can be made on order for 300 Euro, lead time 3-4 weeks.
  9. Bit of a thread resurrection, I've noticed once I first start the car and set off in first gear if you let off the throttle it feels like it wants to kangaroo jump. Could this be the culprit
    Mircea likes this.
  10. -Jamie-

    -Jamie- RSM Moderator

    That's quite common on them if you set off straight away from starting up, characteristics of the engine
    Mircea likes this.
  11. Well you learn something new everyday. Guess it ain't broken then.
  12. Resurrecting this one...just skimmed 3 pages.

    Can someone simply say:

    a) does the 275 Trophy R part already take M12
    b) what m12 bolt are people buying

    I have the powerflex black drivers side top insert/support AND the vibra whatever lower gearbox mount. Do I still need to do this?
  13. I would use an M14 bolt just to be sure, just make sure that it is a high tensile bolt
  14. Now you're just confusing me more! I just want to go and buy something, fit it, job done. OR, work out that I don't need it.
  15. I would not say you "need" it, but it is known to fail, not bothered doing mine
  16. Thanks Mikey,

    I'll think on it for sure.
  17. Coming back on this one..I'm having the Kirfel item fitted later this year (lower part of the gearbox mount). Should I order the upper rubber part also? I have the Powerflex Black timing side mount insert and the Vibra whatever lower mount already.

    I've noticed that when driving in gear and lifting off the throttle, you can hear a clunk from the gearbox mount area.
  18. -Jamie-

    -Jamie- RSM Moderator

    You do realise you can do the exact same thing as the Kirfel lower mount for the cost of a decent M12 hi tensile bolt mark [emoji23]
  19. Yeah but I really don't like the idea of helicoils. I've used them a few times but it doesn't sit well with it's kind of cool to have some tat from Raeder/Kirfel on the car :wink:
  20. -Jamie-

    -Jamie- RSM Moderator

    Its not a helicoil though, Drill it out and retap it. Exactly what your about to spend 500e on.

    Moneybags :tearsofjoy:
  21. Hah! Not a fan of drilling stuff out etc though in general, even though I know it's probably fine! My 500E mount I'm sure must be something more than just an m12 hole...we won't know till I have it in my hand. Question above though is, do I need to rubber mount also/should I get one.
  22. -Jamie-

    -Jamie- RSM Moderator

    Trust me, it isn't anything more than that. It may be machined nicely and anodised red. But all it is is a copy of the OEM part with an M12 hole. I say this from experience and looking at all the Kirfel parts in person.

    The bolt is the issue on them not the mount, Ive never seen anyone snapping or featuring the actual mount, Its just the OEM M10 mount that goes. Saying that im running an OEM spec one with zero issues but all my mother mounts are uprated
  23. I'm looking forward to having a wander round Kirfel myself...dangerous business. So no point doing the top rubber mount then even if I'm experiencing a clunk on lift off?
  24. Don't get too excited wandering round Kirfel mind.
    Mark_RS likes this.
  25. Honestly...I can't. I spend money like water most of the time but these past few months has been silly even by my standards :worried:
  26. Where are people buying there M12 bolts?
  27. What is the torque setting for this bolt?
  28. I'd like to know the answer to this too! Where dd you get yours from in the end mate?
  29. Attempted this today, but couldn't access the bottom bolt on the top part of the mount nearest the front (bottom right on the picture, definitely not as easy to access as that shows!). I know they only need to be loosened, but I couldn't even get space to do that! How has everyone got at these bolts to loosen them?

  30. -Jamie-

    -Jamie- RSM Moderator

    In through the arch is the easiest way
  31. Thought that might be the case, thanks. I take it it's easy to get the arch liner out, just a few screws?
  32. -Jamie-

    -Jamie- RSM Moderator

    Yeah that's it, screw at the front of the arch then some clips
  33. ianplymouth

    ianplymouth RSM Club Member

    Two screws and some big headed plastic clip things.
  34. ianplymouth

    ianplymouth RSM Club Member

    A right angled pair of circlip pliers work well to get the plastic things out
  35. The bottom bolt (front 1) you can do this under the car.... remove the undertry and can be accessed
    Fiddly but easily done.

    Sent from my SM-G965F using Tapatalk
  36. You have a Service manual for the RS?
    Can you send it to me or post a link?

  37. Mircea and Raptor6767 like this.
  38. I've read the thread and have a couple questions

    Is the standard M10 bolt a standard 1.5 pitch?

    Torque setting for the standard bolt ?

    Is there a reason why a 1.5 pitch thread is suggested for the M12 rather than the normal coarse 1.75 ?

    Many thanks

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