I'd like to resurrect this old thread, as it is of interest to me atm, I just want to run my theorys past some of you guys......

I'm currently bulding a 4X4 24V V6 Puma for stage rallying and will be doing a variety of loose and grippy surface events. The car has 4X4 Sierra transmission.

I have 4 or 5 MT75 4x4 units, mostly all with good transfer guts, so plenty of bits available to "play with"

I have one apart on the bench ATM.

What I want to do is have 3 different set of transfer guts, which can be fitted prior to the events, depending on surfaces to be driven on.

The first option is easy, stock guts for tarmac use with standard F&R torque split.

The second option looks very easy to me, a 2wd opion, basically a blanking plug for the front prop seal, remove front prop.

Remove centre visous diff unit, and all other parts not needed, chain etc, then weld the rest of the relevant bits together, so I'm directly driving the rear propshaft flange only, thus giving me RWD to enter RWD only events.

I'm struggling with a fried brain, to get my head round the 3rd and final option, which is to retain centre viscous diff action, but turn the front and rear propshafts at the same speed, thus getting a 50 / 50 split (??) to use on gravel / loose surfaces.

It looks to me at this stage that if the sun gear, planet carrier and outer annulus ring is all locked together (welded, bolted, pinned), then I'll get the desired 50 / 50 split, but still have centre viscous diff action.............

Anyone have any thoughts or tried this out ????

Cheers Dave