: Rear axle types



CoupedeVille'73
08-02-09, 02:17 PM
I lately discovered that the drivetrain of my '73 doesn't run straight in the middle, but moves a little to the right of the car and ends in some sort of gear reduction part of the differential.
Is this a normal differential type? And why is this so?

Thanks for your answers.

jayoldschool
08-02-09, 06:20 PM
This is normal. The pinion gear is offset slightly to meet with the ring gear. Inside that differential, there are two main gears: a ring and a pinion. The pinion is turned by the driveshaft. The pinion turns the ring gear, which is bolted to the carrier that turns the axles. In your 73, I bet the pinion turns 3.08 times for every time the ring gear turns. This would be 3.08 gears. The job of the gears is to multiply the power from the transmission. Generally, lower numbers (higher gears) mean slower acceleration, but better mileage. Higher numbers (lower gears) mean faster acceleration, but lower mileage.

http://www.motorera.com/dictionary/pics/h/hypoid.gif

CoupedeVille'73
08-02-09, 07:18 PM
Thanks a lot for your explanation and the illustration you inserted.
Now I do understand the function better than I did before. :)