about a year or two ago i bought a CTS stage 2 + gearbox for the car,
which is a BC' box but with larger ib5 bearings, shot+peened gearset and a quaife ATB diff
but after finding out recently that the bc' box suffers with case flex, which could lead to allowing the bearings to move
and basically kill the box,
the ib5 gearbox is a development of the bc' box design
stronger casing, bigger bearings, better syncro's, starter motor at the back of the engine instead of the front etc
also because the gear stick centralising spring is inside the gearbox
this allows me to upgrade to a puma / mk5 fiesta gear stick selector
as the old bc box has the centralising spring in the selector itself,
so with a gearbox package sorted from a good mate on fiestaturbo.com
the plan was to swap the internals and diff over from one box to the other,
so that i'd have a ib5 with shot peened gears and quaife diff with all the advantages of the ib5
but due to lots of bearing size differences, it was decided to simply just swap the diff over to the ib5
which works out better in the end because i've kept the better syncro's
so a roadtrip was needed to collect the gearbox so that i could have the internals swapped over by two good mates in work,
i then borrowed the other halfs car and the company of a good mate mr wolze for the 450mile trip
it got a little dirty on the way with all the salt/grit and snow about
here's a picture of the two gearbox internal swapping legends, without them i'd be buggered
mr Wolze on the left, mr Potter on the right
heres the two box's ready to have their insides swapped
got new ford gaskets, bolts and 5th gear cover plate ready
the two box's mid operation
the quaife atb on the left, the standard ib5 diff on the right
with the swap over complete it was time to clean the ib5 up
with the help of another mate kenny and mr wolze, we got bungs for where the driveshafts go
and gave the whole box a scrub with parafin then blasted it off
heres a pic showing the bungs
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