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Thread: Free travel of counterfhaft gear cluster in type 9

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    Free travel of counterfhaft gear cluster in type 9

    Hello,

    I'm rebuilding a type N at the moment and I need some help.

    Gearbox is almost assembled now, but I have noticed that counterfhaft gear cluster travels axially by about 1,5 mm.

    Nut <26> is tightened with torque 135 nm, spacer <23> and washer <25> are in their place.

    I can't remember, if I saw free travel before disassembly :-)


    Is this right?

    Ford Sierra'87 OHC 2.0i (N4B) type 9

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    Re: Free travel of counterfhaft gear cluster in type 9

    Quote Originally Posted by Ivan View Post
    Hello,

    I'm rebuilding a type N at the moment and I need some help.

    Gearbox is almost assembled now, but I have noticed that counterfhaft gear cluster travels axially by about 1,5 mm.

    Nut <26> is tightened with torque 135 nm, spacer <23> and washer <25> are in their place.

    I can't remember, if I saw free travel before disassembly :-)


    Is this right?

    Hello Ivan,

    The rear bearing (22) should have no more than approx 0.125mm play backwards/forwards once assembled. If the play is coming from there the bearing is either not installed/seated correctly, or is worn out. It is this bearing that controls endfloat (axial) of the cluster gear (21).

    If you haven't fitted 5th gear underneath the nut (26) to do the test for axial movement then that sounds like where the problem could lie.

    Perhaps you could post a picture of the insides of your gearbox?
    Last edited by HonkyWhiteTrash; 29-08-2018 at 16:57.

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    Re: Free travel of counterfhaft gear cluster in type 9

    Hellow,

    I have pulled off 5th gear cog and made some investigations. There are two issues causing free travel of gear cluster:
    1) free play of bearing <22> gives about 0.5 mm
    2) 5th gear cog <24> was not fitted completely, although nut <26> was tightened with correct torque. This allows cluster (together with 5th gear cog) move relative to bearing. This gives about 1 mm.

    I think, second issue is not difficult to fix. But first seems strange. Bearing moves freely towards input shaft, until it faces 1st gear cog <13>. There are no signs of wear on side surface of bearing. So, I think 5th gear cog <24> faces aluminium plate sooner. There are evident signs of wear on aluminium plate (see picture below).

    Is this a normal situation for this gearbox?

    Ford Sierra'87 OHC 2.0i (N4B) type 9

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    Re: Free travel of counterfhaft gear cluster in type 9

    The rear bearing (22) looks odd - have you fitted a new correct one, or is it the one that was in the gearbox previously?

    The bearing should be held tight against the rear casing in the gearbox once everything is bolted up. Either the bearing is incorrect (too narrow), or the cast iron main case isn't supporting the bearing to stop it moving.
    Has the cast iron main case been modified around the bearing (22) seating area?

    5th gear shouldn't contact/wear the aluminium case in normal use.
    Last edited by HonkyWhiteTrash; 04-09-2018 at 09:33.

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