I just emailed them thx Easyier installation already the diff and diff housing are attached to the rover ,was looking at Killer axles from germany with the bolt on and i said why not all i need is 4flanges and 4new axles shafts volvo to rover and i am finished in theorie I am not debating it it works or not,do you have proof off someone that did it and it failed ?maybe i am wrong but i am only asking for a source for taller diffs .Thx