Thread: Six Gear Diff and Puma 4 pin

I was looking at an old advertisement for my 110 and it stated that it had a 6 gear fine spline front diff. From some searching it seems McNamara made a 4 pin replacement which they call a Six Gear Carrier so I'm assuming this is what I may have? Jack McNamara - Differential Specialists. Does anyone know what else it may be if not this? It looks to be installed around 2000.

I also have spare what I'm lead to believe a Puma front Rover diff centre which is 4 pin. Some more searching shows that Puma fronts are 2 pin so maybe it's a P38 rear 4 pin. Here's a pic if anybody can help identifying it.



So just wondering the way forward if I wanted to maybe upgrade to a Trutrac in the front of mine. Should I bother if I can confirm I have a "6 Gear Diff" which is four pin, if not replace with Rover 4 pin if that's what it is. Or if these are worth anything sell them to fund the Trutrac? Rear diff is already sorted with Detroit and Hytuff axles.

Originally Posted by Bush65

The 6 gears in the differential are comprised of 4 pinions and 2 side gears. Besides the possibilities mention in other posts above, IIRC Land Rover supplied a 4 pinion rover diff in some special vehicles. From my reading of the UK forums, it seems they weren't too difficult to come by over there, but they only fixed the weakness in the rover differential, whereas for a bit more cash you could also improve the traction.

BTW

Pin as used in 2 pin or 4 pin is an abbreviation for pinion.

As with any pair of mating gears, the smaller gear is always named pinion and the larger is named wheel or sometimes simply gear.

Interesting to note that MY12 onwards 110's delivered in Australia get the 4 pin Rover front diff as standard fitment. They've stopped making the 2 pin Rover diffs apparently.