You need to match ratios

front diff - 3.62:1
rear diff - 4.27:1

At a given speed the two props will be turning at different rates, and that needs reconciling by the transfer chain ratio, to prevent the centre diff being made to slip.

The maths:

4.27 divided by 3.62=1.179, you therefore need a drop gear ratio of 1.179:1

You have a drop gear set of 24/26 (24 on the driver, 26 on the driven)

Divide 26 by 24=1.083, which will not work.

To find out what it is for...

Multiply 3.62 by 1.083=3.92.

The drop gears you have are for 3.92:1 rear diff