Yes. An electric selectable rear diff locker option. They came in 4.10:1, 4.30:1, and 4.56:1 ratios.
It was an option from 1996-2000.
If you had a 4 cylinder engine, and manual transmission it was the 4.56:1 ratio
If you had the V6 engine and manual transmission, it was the 4.10:1 ratio
The V6 with the automatic transmission was a 4.30:1 ratio
I had the V6, 5-speed manual, and 4.10 ratio with the rear diff locker.
To install one of those E-lockers in a housing that didn't have one from the factory, requires some fabrication. Ideally you would get the entire rear axle with the E-locker and the correct gear ratio to match the front.
An aftermarket locker installed in your existing 3rd member would be easier.