Fairlaine LSD diff - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

XR6EL · 09-30-2005, 23:13

Hi all,
Will a LSD diff out of a ZL fairlaine fit straight into an XF falcon sedan?

But then change the diff gears from 2'7'7 to 3'9'1 ratio

any help would be appreciated......Thanks

RPO-083 · 10-01-2005, 03:03

The housing itself will bolt in. The limo centre will not accept the 3.9 gears

XR6EL · 10-01-2005, 03:34

ok....but what's a limo centre?

xcgxl · 10-01-2005, 04:58

LIMO = Limited Slip Diff

XR6EL · 10-01-2005, 05:17

thanks..but what is the biggest ratio i can put into the limo?

RPO-083 · 10-02-2005, 01:45

The problem is the offset of the hemisphere used for the 2.77 gearset. You can get a centre from an XR6 (for example) which have a diferent hemisphere, or maybe you should search the forum. From memory I think something else fits; maybe Nissan gears.....???

XR6EL · 10-02-2005, 20:32

thanks.

..and 1 last question,......do i need the driveshaft out of the fairlane since the fairlane's body is longer than the xf?

and before anybody says"just measure it" i cant because the fairlane is sitting on it's 4 rotors and makes it impossible to get under the car

RPO-083 · 10-02-2005, 22:22

No, you don't. The tailshaft is longer to suit the longer body, it is not dependant on the diff (most times, anyway...).

XR6EL · 10-03-2005, 01:06

thanks

very last question....did all automatic (84-87 xf falcons/xf fairmont and ghia's/zl fairlane's./ltd all have a 2.77 diff ratio ? which ones in this time period have 2.92 ratio?

and would i be right to presume that fairlanes84 -87 had a 2.92 ratio or is this wrong?

or alternativly would i be better of getting a EA BTR diff plus shaft so i can get the 3.9.1 ratio to put in relacement of the crappy 2.77 i have now...?

61sg · 10-12-2005, 01:41

they came with eithier 2.77 or 2.92 in lsd
and 2.77. 2.92 or 3.23 in open centre.

theres no hard and fast rule to which had what best to just look at tag on back of diff.
does yours currently have disc brakes on the rear? when you put fairlane diff in it will have and if your doesn't then you have to modify handbrake.

but basically yes a fairlane diff will slot straight in they are the same externally.
why do you want 3.9 gears just out of interest?