Ford 7610 ZF 4wd Drop box

[Oldmole]

Can any one help with what the correct ratio is for the ZF 4wd DROP BOX fitted to a series 2 7610. ID plate missing from existing unit . Need to aquire a replacement box but believe there is more than one ratio on these boxes depending on which 10 series it is fitted. I have been offered 0.905 Ratio box but is that OK for the 7610

 

[TractorTech]

Probably the only way to determine the ratio is to take it off and see how many teeth each gear has. Attached is the drop box for 5/1984 and later which in the US is a series II if I remember correctly. As you can see though, there are a couple of ratios here.

Also, this is for a tractor equipped without a transmission handbrake.