diff ratio swap

Post Fri May 31, 2013 11:41 pm

i was given a s3.64 diff and was wondering if it is possible to swap the ratio to 3.91 or 4.10, would it be possible to get a second open diff the same case size, and swap the lsd unit in to the new case, and what exactly would be required?

Post Sat Jun 01, 2013 9:16 pm

Yes. The crown wheel and pinion are what determine the diff ratio, and both are swappable. How this feat is achieved I'm not sure of the finer details. .

Post Tue Jun 04, 2013 4:01 pm

so can any one else comment on how easy it would be to swap the ratio of a lsd, could i get the new diff remove the open diff bolt the crown wheel to the lsd unit and re fit, all providing i didnt play with the pinion i would assume that i would need to re set the backlash?, also if i re used the same shims from the same sides and same side bearing plate bits from the lsd unit would i be fairly close on bearing pre-load and tooth contact in theory?