4.6 diff versus 4.3

[Throbbinhood]

Thankx Chris.
What is the exact issue with 35" going down the hill with 4.3 diff?
What do you experience when going downhill?!
4.8 is an aftermarket ring and pinion combination. Not from Japan I think. From Italy from what I read on the internet and apparently harder to set the backlash properly.
Without having both front and back diffs, ratio change is useless anyway, isn't it?
Mine's got enough lift by the looks of it. I reckon I can squeeze in 35"s without much issues when I get hold of a set of wheels.

You just don't get the engine braking (being an rb30, not much anyway). My car for instance, I don't get that backpressure/engine braking until 2.5/3k rpm. Those rpm on 35's compared to 31's is significantly faster. 4.6's may bring that back into line, but to be honest, might still be too quick anyway.. It hasn't been a big problem, more an annoyance...

I'm not 100% sure, maybe someone else can clarify, but didn't 2.8GU come with 4.8 diff gears? If so, couldn't you just transfer the centre?
Yes both front and rear diff needs to be the same ratio.

How much lift do you have?