xfish 20 Posted June 21, 2020 hEY GUYS , Im wanting a bit more launch power in my el xr8 ( 4 speed auto ), and it has the factory diff with the ratio 3:45. My question is if I change it to 4:11 ratio...can it mount in the original diff or is something more needed? Share this post Link to post Share on other sites
FORD_MAN 1,026 Posted June 21, 2020 A shop thats good with diffs will be able to change to 4.11 gears easily enough, I have a XG/XH LSD that was built as XY drum brake with 4.11 gears was told was built by Geelong diff services. That said a hi stall convertor would possibly be a good idea, when you take off will flash up to xxxxrpm & help with take off, stock would be like 1800-2000rpm Share this post Link to post Share on other sites
xfish 20 Posted June 21, 2020 Cheers ! I'll check on the high stall requirements....... Though, by changing the diff gears.........will I have any ECU issues? ( erratic gear changes ) or some other electrical issue? Share this post Link to post Share on other sites