hi mate


1st gear is a bit short

2nd is ok

3rd is ok

4th is ok

5th is to low that a pure cruse gear

if you do go to a 3.9 1st gear will be even shorter not only that you will still struggle to pull the 5th gear


if you can go for ratios like 2.95 /2.97/3.00 for a 1st gear

2.10/2.07/2.00/1.94 for 2nd

1.50/1.45/1.4/1.35 for 3rd

1.1 for 4th

0.85/0.83/0.80 /0.77 for 5th dont really go much lower on 5th any of these ratios will be ok in a road car with the 3.64 or 3.62 diff

marco