Confirm my gear ratio....

YELLAHEEP said:

I was told that counting the pinion teeth and dividing that number into the number of ring gear teeth will give me my ratio as well - sound correct?

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YELLAHEEP said:

I did a search hoping to find a Dana chart to identify the gears in my '89 but found nuthin'.

I just bought this XJ and the kid said the rear D35C gears are new and are 3:55's The tag on the cover is stamped 3:55, but the ring/pinion don't have anything stamped on 'em that shows this.

The scary thing is that the front D30's tag is stamped 3:07.

I called a local gear shop and the guy - off the top of his head - tells me that I do indeed have 3:55 rear and 3:07 front based on the info I gave him stamped on the ring gears. I'm just looking to confirm this before I go swapping out gears.

Front D30 info:
7 1486 Dana D 40790 P2770 43 14 (big number stamp - 451 on both ring and pinion gears)

Rear D35C info:
2 1992 Dana D 42725 P8L390 39 11 (big number stamp - 229 on both ring and pinion gears)

The gear guy said the last 4 numbers identify the ratio - 39 11 being 3:55 and 43 14 being 3:07.

Anyone have a link to an I.D. chart for gears using part numbers?

I was told that counting the pinion teeth and dividing that number into the number of ring gear teeth will give me my ratio as well - sound correct?

Thanks in advance!
Troy

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YELLAHEEP said:

Front D30 info:
7 1486 Dana D 40790 P2770 43 14 (big number stamp - 451 on both ring and pinion gears)

Rear D35C info:
2 1992 Dana D 42725 P8L390 39 11 (big number stamp - 229 on both ring and pinion gears)

Troy

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