4.6 diff versus 4.3

[Throbbinhood]

Ok. All this on 35's.

4.3 Slower acceleration, longer gearing, slight increase in fuel consumption. 5th gear doesn't get used too often unless I've got a long straight, otherwise sitting in 4th is more economical @ 100 on 35's. It's been fine for what I use it for, only thing that sort of sucks is steep downhills, low first is too long, but tbh I think it would still be too long on 4.6/4.8, probably want reduction gearing for the really steep downhill.

4.6 will help bring the gearing back into line with stock. Your fuel economy may come back a bit compared to 4.3's, but 35's will increase it anyway (rolling resistance, weight, friction etc).

4.8 will shorten the gearing, so you'll need more rpm's. You'll have better response, but may come at the expense of higher cruising rpm's.