Hi,

excuse me for ma language but i am french

i want for my xr4i DOHC EFI a cosworth dif To win of the couple
i can use a cosworth dif 4x2 or 4x4 ?
I have to change my propshaft ?
if i have to change it , i can take cosworth 2wd or 4wd propshaft ?
can I use my DOHC DRIVESHAFTS with a cosworth dif ?


very thanks you for your answers
a pict of my car

 

If your car is the xr4x4 DOHC then the 4x4 cosworth diff will go straight in but it is a 3.6 ratio where as yours is a 3.9 at the moment and will make your car slower on acceleration but maybe a little more economical
on the motorway.

 

Here is a couple of pics of my dads xr4x4

 

very nice car

did you lose of the power with these wheel rims ?

another pictures of my car

https://passionford.com/forum/viewto...741062#2741062

 

is not xr4X4 but xr4i 2wd DOHC !

so can i use a cosworth 4X4 diff ?
and the cosworth 4x4 diff it is really win of the power Compared in xr4i 2wd diff ?


very thank

 

I've always liked the look of the 3 door Mk 2 Sierra, shame we never saw it in the UK.

 

i am lucky , thank you

 

Sorry fella
I do not have experiance of your exact model so I don't know.
Maybe have a measure up as it will match one of them.
Also not sure what you want to achieve by changing it (unles its broke or you want LSD or different ratio)

 

4x4 cosworth diff will fit straight in and you can use the same propshaft and driveshafts if yours is a model with disc brakes on the rear.

4x2 cosworth diff will not fit as it is wider where it mounts into the beam (7.5 inches compared to 7).

hope that helps, and nice car. i would consider importing one some day and converting it to 24v cosworth engine.

 

very thank but is not a model with disc brakes on the rear.
but i think that has to go

the cosworth 4x4 diff is Shorter of XR4i diff ?
again thanks Has you all

 

all diffs are basically the same length and use the same propshaft.

the differences are in the width, but there are only 2 different widths. 7 inches from normal sierra's including all 4x4, and 7.5 inches from granada's and scorpios that were also used for cosworth 2WD only.

in the 7" width's, there are differences in the output flanges. some have bolt on driveshafts (all those models with disc brakes), and some don't.

if you can take a picture of your differential and show the driveshafts, i can comment further

 

thank you !
I go to take a picture

 

if you've got drums on the back you won't be able to bolt the diff straight in

you can't use the 2wd diff as it's physically too big to match up with what youv'e got on your car

there is a way to get the drum rear shafts to work with the diff but seeing as you need the outputs from the lsd car which are longer on one side it's a lot of fiddling about

find a guy called ratty who posts here, he'll give you the full rundown