TOYOTA HILUX DIFF RATIO'S

1kz was 4.556:1

The petrol 3rz was 4.3:1

Yes, they were a high revver for 100 kph but you get used to it. Toyotas never love being geared up.
Try bigger tyres first, that will give you an idea of what you stand to lose in economy and performance by changing ratios around.

Hi Reggy
i have the ln167 5le (3ltr) engine
standard diff in mine is 4.5/1 and sits on about 2950 rpm @100kph with 245/70-16 all terrain tyres on so yes this sounds normal.

due to a diff issue i had the diff centre replaced and the dumb azz mechanic put 4.1/1 centre in by mistake this only brought the rpm down a little say 250 rpm

with the 4.1/1 ratio diff in the hilux was a lot harder to get off the line. so it used more fuel around town than highway and the opposite effect with the 4.5/1.

so in the end there was near zero effect on fuel economy with the two types of diff ratios

if you can get some larger tyres on to get you under that 3000 rpm range thats where you will find a bit better fuel economy.

as a guide i'm getting 500 to 550 k a tank i have the duel cab which i think has a 65ltr tank on it (std) i've been told before that single cabs have a slightly larger tank i think 75ltr

hope this info helps you
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