xj6
thought I'd pass on some info for that Jag axle front and rear.
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The internals are indeed dana 44, but most of the pinions are 10 spline
as opposed to 26 splines in US applications, if yours is a 10 spline one
you will need to get a part from dana called: DANA SPICER 2-1-2391 if
you buy your ring and pinion from some aftermarket place ,
which is the coupler but with 26 splines instead.
other mods can be replacing the needle bearings which are abundant
(and expensive) in the control arms with bronze bushings, do a search,
there are a couple of companies doing Cobras that have this,
I found out why there can be problems with the brakes.
The callipers overheat and the heat cooks the axle and brake calliper
seals if you run the vehicle really hard. Vented rotors help but are
costly.
I found something out about using Dana 44 gears. The gears are cheap
enough or so a set, but the cut off for the carrier is 2.88.
Anything steeper (3.08, 3.31, etc.) needs a new carrier so.
The D44 pinion shaft is a different size than the Jag, so you will need
to order the right size bearings. Nothing special, just measure shaft
and outside of original Jag bearing and order. Same for the pinion seal.
You can get a flange that will accept the Jag driveshaft,
but cheaper to use a US style yoke with straps. Order a seal after you
get the yoke -- again by measuring and ordering from an
industrial bearing supply house. You will also need the D44 crush washer.
The holes in the D44 ring gear are
slightly larger than the holes in the Jag gear, So you either have to
drill and tap the Jag
carrier for larger bolts or get spacers or
shoulder bolts made. The European models got all kinds of different
ratios, but North American
& au XJ6 only came with 3.54 with four speeds and 3.07 with autos
(mid 70s-mid 80s), and 2.88 with autos in the late 80s-early 90s.
68 (first year for XJ-6) to mid 70s models used a 3.31 gear with
the auto trans (a Borg Warner). Older big Jags (pre 68) used a 3.54 rear
axle, XKE six w/four speed a 3.07 with 3.31 or 3.54 optional.
This is the ratio tag displayed as a fraction.
IE 13/43 = 3.3 14/43 = 3.07 and so on.
If you see 2 tags, the second one will probably have
"PL" on it and stands for Power Lock Differential, which
was an optional extra, but standard on the XJS.
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