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Gear ratio?? No tag

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Old 02-26-2013, 10:15 PM
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Default Gear ratio?? No tag

Picked up a d30 hp. Supposed to be matching ratio as the 8.25 I got from the guy. The 8.25 is 3.55 but the d30 has no tag, any ideas with this pic?
Old 02-26-2013, 10:19 PM
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I know 90% of the XJ axles had 355s just want to make sure
Old 02-26-2013, 10:24 PM
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Turn the ring one turn exactly and count the rotations of the yoke. If it turns 3 1/2 times you have 3.55s, 3 3/4 is 3.73 and so on.
Old 02-26-2013, 11:09 PM
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Count the teeth on the ring and pinon and divide them easy way. Just mark a tooth
Old 02-27-2013, 05:54 AM
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Originally Posted by Asphalt Cowboy
Count the teeth on the ring and pinon and divide them easy way. Just mark a tooth
Yep. Or use the numbers stamped on the ring gear. Pic isn't clear enough or I woulda done it.
Old 02-27-2013, 08:36 AM
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thanks guys. 39 ring teeth x 11 pinion teeth. 39X11=3.54.....
Old 02-27-2013, 08:36 AM
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39 divided by 11**
Old 02-27-2013, 07:23 PM
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Yes,you are correct.
Old 02-27-2013, 07:36 PM
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Originally Posted by MichiganCherokee
39 divided by 11**

Good job, Grasshopper.
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