Being a 2wd I am not sure what they used for rations, but I can help narrow it down and tell you how to find out for sure. Ratios that I know Toyota used are 3.58, in Tacomas at least, 3.90, 4.10, 4.30 and 4.56. The 4.56 were only in 4 cylinder models. If you had the 15" 225/75 tires stock you have either the 3.58 or 3.90 most likely. To find out jack up the rear end and mark a point on the tire and on the driveshaft, then spin the tire one complete turn counting how many revolutions the drive shaft makes. If it turns just under 4 times you have 3.90, a little over 4 4.10 and so on.