You are the happy owner of a car with the right gear ratios. Don't change. Modern cars have too hight gear ratios due to low emissions restriction, inducing lower accelerations. My 2005 PLUS 4 has quite the same 5th ratio than the last Porsche which wins Le Mans... but not with the same power. The theoretical maximun speed of my PLUS 4 with the Ford gearbox is 160 mph at maximun rev!!!
The Type 9 has identical gear ratios as the standard 4spd box for gears 1 to 4 (3.65:1, 1.97:1, 1.37:1 and 1:1). The additional 5 gear gives a ratio of 0.82:1
Thankfully, there's more than enough power to handle the lower ratio. Not looking to increase top speed, but will be less strain to bimble along at 60mph at 2600rpm, rather than 3100rpm.
