Does the front diff on a sierra 4x4 have an LSD ?

Not that I'm aware of. The middle/gearbox one is and so is the rear.

I agree. I don't think even the Cossie ones are LSD but yuo can buy them from Quaife etc.

I have an old front diff if you need one cheap.

Steve

Cheers.

The reason I ask is,I have one in the donor car. I can not be bothered to take it out to sell, as they seem to make bugger all on ebay. But if it was an Lsd I would keep it for a chain drive project.

ohwell........

pretty sure they're not

I don't think so neither.