I have an early 395 transaxle and I swapped out the 0.91 5th for a 0.86 5th (thanks Gerald). I’m running 175/70R13 tires front and back (S1):
3800 @ 100 kph (62.2 mph) in 4th
3100 @ 100 kph (62.2 mph) in 5th
3400 @ 110 kph (68.4 mph) in 5th
3700 @ 120 kph (74.6 mph) in 5th
Before, if you shifted slowly from 4th to 5th, you didn’t notice any rpm drop at all as it only dropped a couple of hundred rpm.