which lsd would be best for my car

[huish]

i have a 325 auto with the switchable box i got two lsd's 1 is 3.64 an the other is 3.73 which would be better??

[Sanchez]

.64 will give better top end and ''MPG'' and the .73 will be better for ''off the line'' driving.

[B7]

The 73 would be correct for an auto 2.5 but I've run 64s for years in one and it was fine. Better on a run and better economy with little difference in performance

[huish]

ok thanks guys