Hy dantheman49-6400, that is a Timken double reduction two speed, it has a high speed ratio of 6.13 to 1, and a low speed ratio of 8.1 to 1. To shift from low to high vacuum and atmosheric pressure are reversed at the diaphragm shifting unit on the differential, so that diaphragm must be in good condition. The capacity of that axle is 13,000 lbs. hope that helps.
