ClassicOldsmobile.com - View Single Post - Questions for '71 Cutlass Supreme differential

J-(Chicago) · 08-04-2007, 07:18 PM

With the pumpkin cover off & transmission in neutral....Count as you spin the wheel by hand. Mark one tooth with white out or chalk so you know where you started.
Axles connected by gears are always synchronized exactly with one another.
They make it possible to determine exact gear ratios - you just count the number of teeth in the two gears and divide. So if one gear has 60 teeth and another has 20, the gear ratio when these two gears are connected together is 3:1.
They make it so that slight imperfections in the actual diameter and circumference of two gears don't matter. The gear ratio is controlled by the number of teeth even if the diameters are a bit off.

08-04-2007, 07:18 PM	#5 (permalink)
J-(Chicago) Seasoned beater pilot. Join Date: Jan 2007 Location: Chicago Posts: 1,537	With the pumpkin cover off & transmission in neutral....Count as you spin the wheel by hand. Mark one tooth with white out or chalk so you know where you started. Axles connected by gears are always synchronized exactly with one another. They make it possible to determine exact gear ratios - you just count the number of teeth in the two gears and divide. So if one gear has 60 teeth and another has 20, the gear ratio when these two gears are connected together is 3:1. They make it so that slight imperfections in the actual diameter and circumference of two gears don't matter. The gear ratio is controlled by the number of teeth even if the diameters are a bit off. __________________ I'd rather have a numbers matching poker hand.