Hilux Diff Ratio Chart. Common ratios to be found at wreckers in australia are from 4 110 1 to 4 875 1. The stock ratios are coloured in yellow the best match for a given tyre size are coloured in green and ones that you can get away with are shown in blue.
So in the top left hand yellow box is the standard wheel diameter and diff ratio showing the rev s the engine is doing at 100kph then you just go down choose the tyre diameter you are after and find the diff ratio that gives you the required revs that is as close to standard as possible. A 7 5 01 3 42. B 4 pinion open.
One of the previous owners had retro fitted the correct ratio 4 556 rear diff but the front diff was still 4 875.
When you shift into 4 low you are usually at least doubling your crawl ratio in a rf1a transfer case you go from a 1 1 gearing in high to 2 28 1 gearing in low. In conjunction with that across the top going across is a list of available diff ratios for the hilux. The closest fit for an escort is the hilux 2wd diff from rn10 rn15 rn20 rn25 models. Positions 2 3 ratio final position differential type.
