Yes they do impressive work
there is this way as well
showpost.php?p=200727&postcount=3
You just need an wrecked L series
TOONGA
Brumby WRX conversion, tailshaft vibration
Have you checked the front and rear diff are the same ratios?
I got a flat tyre on my Brumby with a WRX 4.44 diff and 14 sunraysias and fitted a std 13 wheel on the rear and the vibration was that bad from the viscous centre. Tailshaft was rattling that bad I thought it was going to fall off. I was running it RWD only.
The centre diff in a manual gearbox is also a viscous type which I assume will do the same thing
I got a flat tyre on my Brumby with a WRX 4.44 diff and 14 sunraysias and fitted a std 13 wheel on the rear and the vibration was that bad from the viscous centre. Tailshaft was rattling that bad I thought it was going to fall off. I was running it RWD only.
The centre diff in a manual gearbox is also a viscous type which I assume will do the same thing