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  1. #1
    Non-member Adey aka Ewok's Avatar
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    F4r gearbox swap?

    Anyone know if you can fit the r5 box to the 172 engine while keeping the 215mm flywheel?

  2. #2
    Non-member allanr5gtt's Avatar
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    Re: F4r gearbox swap?

    yes you can very tight. a sight bit of grining and playing with the dowel for the starter motor.

  3. #3
    Non-member SCHWARTZ's Avatar
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    Re: F4r gearbox swap?

    I have the 215mm fly b18ft mated to a 5 gearbox, There is a dowel that you must remove from the box its below the starter.
    Likes Lewis liked this post

  4. #4
    Non-member Adey aka Ewok's Avatar
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    Re: F4r gearbox swap?

    I mated a valver to a 5 box before and remember I had to move a dowel bit have no idea what size fly wheels that was. Cheers for the info peeps

  5. #5
    Non-member Adey aka Ewok's Avatar
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    Re: F4r gearbox swap?

    Been a while since I've played pikey, whatsthe stronger box? 5gtt or 172? Tho I've killed lots of 172 boxes so that probably answers that one

  6. #6
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    Ashy's Avatar
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    Re: F4r gearbox swap?

    phase 1 172 box is the strongest.

  7. #7
    Non-member 5teve L's Avatar
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    Re: F4r gearbox swap?

    What exactly goes wrong with your boxes, are you smashing the gears or popping the circlip so you pop the shaft & loose drive ?

  8. #8
    Non-member Adey aka Ewok's Avatar
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    Re: F4r gearbox swap?

    I smashed the gears and cracked the casing on my last ph1 172 box

  9. #9
    Non-member 5teve L's Avatar
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    Re: F4r gearbox swap?

    Quote Originally Posted by Adey aka Ewok View Post
    I smashed the gears and cracked the casing on my last ph1 172 box
    Not sure there is alot you can do about that really except be a little more gentle with it
    I'm dreading putting 300hp through my valver box I have a GTT box as a spare, think I will either have to get one of those rings that bolt in or a bolt in diff or I can see shafts popping out all the time

    Are any of the volvo boxes any good ?

  10. #10
    Committee, Moderator Matt Cole's Avatar
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    Re: F4r gearbox swap?

    JB casing is a bit beefier but the 172 box has better gears.

    In other words, both as usefull as each other!

  11. #11
    Non-member SCHWARTZ's Avatar
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    Re: F4r gearbox swap?

    the m60 volvo box is suposed to be little stronger that gtt (and porb not as abused) also has a longer 5th aparently

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