http://www.fj40minispool.com/differential-parts/lockers/fj40-mini-spool
Here's what the website says:
The FJ40 Mini Spool replaces the spider gears inside a standard open carrier and locks the right and left axle shafts together.
This FJ40 Mini Spool is a quick and simple 1 hour or less install. The FJ40 Mini Spool is an inexpensive option to a locker or to replace worn out spider gears.
Fitment- Fits from 64-90 Fj40, Fj45, FJ60 64-90 with 30 spline axles. Rear must be c-clip semi float OPEN CARRIER with 30 spline axles. Will fit older models if you change to 30 spline c-clip style axles.
Warranty- 1yr from manufactures defects.
Here's what the website says:
The FJ40 Mini Spool replaces the spider gears inside a standard open carrier and locks the right and left axle shafts together.
This FJ40 Mini Spool is a quick and simple 1 hour or less install. The FJ40 Mini Spool is an inexpensive option to a locker or to replace worn out spider gears.
Fitment- Fits from 64-90 Fj40, Fj45, FJ60 64-90 with 30 spline axles. Rear must be c-clip semi float OPEN CARRIER with 30 spline axles. Will fit older models if you change to 30 spline c-clip style axles.
Warranty- 1yr from manufactures defects.