Marcos Maniacs

Hi Don,
I don't know for sure but I bet that the British Ford people used 
the same rear end casting for all the ratios. (actually there are 
several castings that are slightly different on the outside made 
apparently for slightly different applications but with no relation 
to the ratio inside that fit the Cortina rear ends.  Why don't you 
jack up one of the rear wheels, put the car in neutral, rotate the 
wheel in the air 1 full turn and count how many times your 
driveshaft/pinion flange goes around.  The available ratios are far 
enough apart that you should be able to tell which ratio you have. 
Dave Bean Engineering list the following ratios that would be 
candidates for your car... 3.55 (3 and 1/2 turns of the pinion), 
3.77(3 and 3/4 turns of the pinion), 3.90 (almost 4 turns of the 
pinion) Of course, you could always pull the rear end apart if you 
are really courious ;)
Mike Denman
1966 Marcos 1800
Chassis # 4079


--- In MarcosManiacs@y..., "Don Lattimer" <donlattimer@p...> wrote:
> Mark or anyone,
> 
> The # on my rear axle is FoMoCo # 105E 4025B.  On the opposite side 
> (left hand side) are the numbers N12 and OE27.  All 3 numbers are 
> cast in the housing.  I can't seem to find the Ford UK catalogues on 
> the internet.  Does anyone have access to them??  If so, what rear 
> end do I have??  
> 
> Don Lattimer
> #3M5759 V6
> Willits, CA