7.5 in Ford rear end pinion offset - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-18-2010, 06:59 AM
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7.5 in Ford rear end pinion offset

Hey,

I have a 1999 7.5 in Ford rear end ring and pinion gear set. I want build a test rig to run these gears and I need the pinion offset or distance between the pinion axis and ring axis. I believe this distance is between 1.00 and 1.25 in. Please share this information or where I can get the pinion offset.

Thanks,
David

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Old 07-18-2010, 03:36 PM
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Measure the pinion gear from the center line of the shaft to the pitch circle. That will be the offset. This is adjusted after they are installed in the rear end housing by using shims.
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Old 07-19-2010, 05:59 AM
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This measurement is one of our problems. Two of us did this measurement and we are getting different answers; 1.00 in and 1.25 in. Ok, a big difference and reason for confirmation. Seems this is 'standard' information and available somewhere. Thanks.
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Old 07-19-2010, 06:16 AM
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You might want to get a 7.5 rear end that is assembled and measure the distance from the center line of the pinion shaft to the mounting surface of the ring gear. This will give you the distance that you need to make a test fixture. Be sure to make the test fixture adjustable.
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Old 07-20-2010, 03:39 PM
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Thanks again, we are working on this indirectly. Hopefully our pinion offset value will be 'good' (like 1.00, 1.125, or 1.25 in). Again, thanks.
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