All late models are basically interchangeable (all square tail diffs, as
well as any GT6 would fit since they all have the larger flanges) The 6
stud is most likely a GT6 and would need the inner most set of holes
plugged leaving the only four outer holes for the spring housing. However,
76 and later Spitfires have a bit stronger differential than all others
INCLUDING the GT because of a slight change in the ring gear/spider gear
housing casting. You might want to check what you have though because there
are different ratios -
1970, and earlier will not bolt up since the flanges are smaller and use
smaller bolts
Original Message:
-----------------
Fellow Listers;
This afternoon I removed the differential from my '77 Spitfire, for it was
getting very noisy under load. I have several used differentials available
to
swap in (four actually), however I noticed that one of them is different
than
the rest. It has a drain plug on the bottom and it has 6 holes for the
mounting studs.
I'm assuming that this differential is from an early Spitfire. I have no
idea
from what car it came from, since I acquired it through a large parts deal.
My question: are all Spitfire differentials interchangeable? I know that
the
early units had different ratios, but will a an early unit mount up to my
'77?
Thanks for the information,
Matt Milkevitch'77 SpitfireWillow Grove, PA
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