Gears are 3.55 and tires are 225/75/15. The axle was just swapped over from my other 88 so I would have the D44 on the 4x4. I don't feel, hear, or smell anything brake related but I'll double check the brake set-up this weekend. Until the tranny is diagnosed, I'm kinda stumped to the cause of such a lack of power. If it needs anything major, I'll have to wait until I sell the one of the 5spd trucks to pay for repairs.