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If you’ve a noisy gearbox…..

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    If you’ve a noisy gearbox…..

    You will probably find issues like these:

    IMG_3255.jpg
    This is the Layshaft thrust needle bearing and washer - you can see where the rollers and the bearing surface have chattered.

    IMG_3257.jpg
    And this is the layshaft showing typical wear from the needle rollers.

    Replacement is the only option,and while you’re in there, change the front and rear bearings because they don’t last for ever…..
    Richard
    Mabel is a white 1972 Mk1½, TV8, Mo/d.

    #2
    Originally posted by mole42 View Post
    You will probably find issues like these:

    IMG_3255.jpg
    This is the Layshaft thrust needle bearing and washer - you can see where the rollers and the bearing surface have chattered.

    IMG_3257.jpg
    And this is the layshaft showing typical wear from the needle rollers.

    Replacement is the only option,and while you’re in there, change the front and rear bearings because they don’t last for ever…..
    Who supplies correctly made layshafts now?

    There were shafts the couldn’t be fitted, due to poor concentricity of the ground surfaces.

    Comment


      #3
      I tried the Racetorations deep hardened layshaft which looks and measures straight and true, but they increase the 0.833" larger end to 0.875" diameter which means the usual bearings don't fit and the gearbox casing needs reaming out accordingly. Their reason? Many gearboxes have the rear layshaft locating hole worn oversize, so by making the layshaft oversize this can be remedied. Problem is that the two needle roller bearings are then a different size, and the thrust bearing and washers need changing for an oversize unit. Not ideal.
      Richard
      Mabel is a white 1972 Mk1½, TV8, Mo/d.

      Comment


        #4
        Originally posted by mole42 View Post
        I tried the Racetorations deep hardened layshaft which looks and measures straight and true, but they increase the 0.833" larger end to 0.875" diameter which means the usual bearings don't fit and the gearbox casing needs reaming out accordingly. Their reason? Many gearboxes have the rear layshaft locating hole worn oversize, so by making the layshaft oversize this can be remedied. Problem is that the two needle roller bearings are then a different size, and the thrust bearing and washers need changing for an oversize unit. Not ideal.

        Comment

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