Why is the 4:10 rare compared to the 4:30? I believe I have the 4:10.
They weren't rare on the Dealer lots here, when they were new. The V6, 5 speed and E-locker combo was popular and pretty common at Dealers in Utah. Because of the generally higher altitude in the State, the manual trans 4Runner's felt noticeably more peppy than the auto trans equipped 4Runners.
In the rest of the Country they might not have been as common. And it would seem that's the case due to how hard it seems to be for people to find them today.
You having 4.10 gears would jive with every V6, 5 speed trans, E-locker equipped 4Runner I looked at on the lots, back when I was looking to buy in 1997. I bought one equipped exactly that way.
For some reason the false assumption continues to exist that all E-locker equipped 4Runners had 4.30 gearing. That's simply incorrect. That might in part be due to the fact that auto trans V6 4Runners are generally more common than 5 speed V6 4Runners. And the auto trans V6 4Runners did have that gear ratio when equipped with the E-locker.