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Transfer box confusion


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I have a 1991 Discovery transfer box fitted to my Defender, with the designation 28D.

From my knowledge this means it is fitted with the 28tooth input gear and it suffix D. Is this correct?

The input gear is not crossdrilled, so does anyone know the part number for the 28 tooth cross drilled gear?



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when i got my cross drilled one from ashcroft i just told them the serial number of the box. ask them to push the bearings on if you get it from them. had to get a lift back after i opened the box :rolleyes:

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Ah ok

I called them and they said I needed ftc5089 which is the crossdrilled 26 tooth one :)

Going to order one tomorrow, and good call on getting them to push the bearings on, i'll get them to do that


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