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Old 04-05-2014, 10:30 AM   #1
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Just got my delivery of a new set of Ring and Pinions, Jeep got D30 front and D44 back

So double chk what I've received, the boxes are correctly labelled as YG D30S-456 TJ and YG D44-456 - as you can see these are Yukon's 456 gears, now looking at the numbers stamped on the ring and pinion, my front one lined up, but the back one got a different number,

The ring got: "F5 18679 304 327"
The pinion got: 31491

Anyone recognised this??

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Old 04-05-2014, 10:49 AM   #2
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Don't worry about it. Companies like Yukon use various sources of R&P gears so the numbers on the gears can vary.

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Old 04-05-2014, 11:08 AM   #3
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I manage to find the ref numbers on the net

http://www.tomsdifferentials.com/201...Pages89-94.pdf

So confident this will work then??

At least, the ring have 50 teeth whereas the pinion got 11 teeth, so it means its 4.54545454 ... Close enough
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Old 04-06-2014, 11:40 AM   #4
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.. No more pointers then ..
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Old 04-06-2014, 11:47 AM   #5
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That would round up to 4.55 which is normal. All TJs, with the exception of Rubicons which have the same D44 axle front and rear, have a .01 ratio difference between the front and rear... like 3.73/3.74, 4.10/4.11, 4.55/456 etc. This is because the ring gear diameters are different for the front Dana 30, and rear Dana 35, or Dana 44 axles are different.
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