Ran across some old stuff about how fast you can run a VX in 4-LO and thought I'd post these numbers from a Car & Driver article I have about the VX, in case anyone would be interested...

TRANSFER GEAR RATIOS
LO 2.48:1
HI 1.00:1

GEAR I
gear ratio: 2.86
mph/1000 rpm: 2.8 LO, 6.9 HI
max test speed LO: 17 mph@6200 rpm
max test speed HI: 43 mph@6200 rpm

GEAR II
gear ratio: 1.62
mph/1000 rpm: 4.9 LO, 12.2 HI
max test speed LO: 30 mph@6200 rpm
max test speed HI: 75 mph@6200 rpm

GEAR III
gear ratio: 1.00
mph/1000 rpm: 7.9 LO, 19.7 HI
max test speed LO: 49 mph@6200 rpm
max test speed HI: 115 mph@5850 rpm

GEAR IV
gear ratio: 0.71
mph/1000 rpm: 10.0 LO, 27.2 HI
max test speed LO: 68 mph@6200 rpm
max test speed HI: 115 mph@4250 rpm