4x4 diff ratio's
 

anybody know what diffs to use on a 4x4 cossie to pick up the acceleration
is it just aftermarket crown wheel and pinions
or is there any other diffs that swap in out of something else? i.e xr4x4 etc?

You have to get both the rear diff and the pignion/chain, otherwise you'll break everything. :)

out of what?

pignon/chain are in the transfert box.

i know that
i've had them out many times doin viscous's
i meant what 1's do i want to be putin in them
the diff and chain drive out of what mate?

bttt

Use diffs out of a 2.0 xr4x4 as they are 3.9 as opposed to standard 3.6 ;-)

Got them fitted to mine and transformed the car :king:

Ditto, most definatly worthwhile changing if you can.

but as said above, you will need to change the step offs in the transfer box to alter the front to 3.9 to match the rea diff.

2.0 xr4x4 front diff is a 3.9 Kelv. Not as strong as 3.6 hence why people run standard front diffs with the 3.9 step off ;-)

yeah i know Rich, thats why ive only ever changed the rear diff and kept the front standard, 3.9 fronts are weaker than rondells :cry:

and the same ratio step off's apply now with the Quaifes and Barra

thanks guys, want it to pick up a bit quicker on track
so do i still change the chain drive if i use the xr4x4 front diff then?

you either change the rear to a 3.9 and then alter the transfer box ratio's so it makes the front drive as if it were a 3.9.

or

you fit a matching pair of 3.9 diffs, ie the ones from an 2.0 4x4 - but thosefront diff are pretty weak.

the most common practice is to go for the first option.

right got it now
thats even better then
i didn't want to swap the front diff
dont mind the back 1 or pulling the box apart
so i'll go with that option
thanks for the help guys
p.s if anybody's got any for sale pm me