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The truck is geared based on foogas motor rpm ranges. A lower revving diesel needs a lower numerically diff gear ratio.


You need lower gears with higher numbers. A 2.3 or a 2.5 turbo wont get going on 3.9something. My car has stock 5.29:1 gears but they are a bit low for small tires so 4.56 or 4.88 are good to about 32" tires. The Gen1 Pajero auto comes with something in that neighbourhood.

1987 SWB Pajero 2.5 TDI on 31" rubber waiting for a hip replacement and bigger shoes