Gear ratio

[1953]

Ok counted 32 ring teeth and 18 pinion teeth im getting 1.7777777 lol i am totally not good at this can somone help 53 chevy 3600 trying to see what kind of ratio mu old chugger has

[mongocanfly]

Sure you counted right? I wouldn't think there's anyway that's right..but I've been wrong before...
Try the ol "rotate the driveshaft with one wheel off the ground trick" and see what you get..count how many revolutions the driveshaft turns to turn the tire 1 rotation

[joedoh]

its not that I dont believe you, but maybe take a picture of what you are counting pinion teeth on. the pinion is really way back in there, I am not sure you can see it with the ring carrier installed. maybe with a mirror...

a pinion usually has 7-10 teeth on it, an 18 tooth pinion would be almost 5 inches in diameter, and with a 32 tooth ring it would be a 1.78 ratio like you are calculating. use a dot of paint to mark the ring tooth you start counting on to make sure you get the ring counted right.


the eaton rears with 32 teeth were 4.56, they had a 7 tooth pinion.

[dsraven]

are you counting the diff side gears instead of the pinion gear maybe? the pinion is a ways back in the housing. google it for a few images. check the side of the ring gear, sometimes they have the ratio stamped in or the number of teeth per gear.

[whitedog76]

Being you said 32 tooth ring gear, I'm going to assume it's a 4.57 gearset, which is what came standard in the 3600 trucks.