Crebe 17 Posted February 24, 2025 Has anyone got diff perch/saddle measurements for various falcon, fairlane models to assist diff building and identification. All measurements in metric or imperial measured at the centre of the perch. You can also measure the side closest to the outside of the car to the inner side of the other side to give a centre measirement. Cant find anything on the net so all models would be great! Share this post Link to post Share on other sites
deankxf 21,470 Posted February 24, 2025 26 minutes ago, Crebe said: Has anyone got diff perch/saddle measurements for various falcon, fairlane models to assist diff building and identification. what is your plan/outcome goal? I don't know the measurement on the spring perches, but an XR (1966) diff will bolt into a 1993 XF ute/van and the only difference being they have a different tail shaft yoke, smaller center bore on the wheels/axle and are narrower between the backing plates(over all width is narrower XR - XY) An EL leaf spring (wagon) diff will bolt into an XF and and even down to an XA (XA and early XB had the smaller wheel center bore like XR - XY) but the diff is basically the same width as XA onwards. AU and therefore probably BA BF FG diffs bolt into EL with the same spring perch, but the AU diff is wider. not sure about the XK to XP, but any leaf spring car XR to AU etc will be basically same between the spring perch. (i think the locating hole may vary in the spring perch also) subject to making sure, this is what i believe. @Thom may know of any other points of interest and/or measurements even 1 Thom reacted to this Share this post Link to post Share on other sites
Thom 6,716 Posted February 24, 2025 Has anyone got diff perch/saddle measurements for various falcon, fairlane models to assist diff building and identification. All measurements in metric or imperial measured at the centre of the perch. You can also measure the side closest to the outside of the car to the inner side of the other side to give a centre measirement. Cant find anything on the net so all models would be great! what is your plan/outcome goal? I don't know the measurement on the spring perches, but an XR (1966) diff will bolt into a 1993 XF ute/van and the only difference being they have a different tail shaft yoke, smaller center bore on the wheels/axle and are narrower between the backing plates(over all width is narrower XR - XY) An EL leaf spring (wagon) diff will bolt into an XF and and even down to an XA (XA and early XB had the smaller wheel center bore like XR - XY) but the diff is basically the same width as XA onwards. AU and therefore probably BA BF FG diffs bolt into EL with the same spring perch, but the AU diff is wider. not sure about the XK to XP, but any leaf spring car XR to AU etc will be basically same between the spring perch. (i think the locating hole may vary in the spring perch also) subject to making sure, this is what i believe. [mention=43]Thom[/mention] may know of any other points of interest and/or measurements evenDean pretty much has it, as far as the perches go there's only two different widths, xk-xp and xr to el, overall widths are different with xk-xp being the narrowest, then xr-xy, xa-el (there are some minor differences differences in widths but its less than 8mm and that's main due to the differences between drum and disc brakes) and au-fgx being the widest 1 deankxf reacted to this Share this post Link to post Share on other sites
Crebe 17 Posted March 2, 2025 Ok thanks for the info guys. My xy 9 inch has measured up as 1129MM centres on perches which may be close to correct! ? Share this post Link to post Share on other sites