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Old 03-26-2010, 08:27 PM   #1 (permalink)
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Tooth pattern check, Ford 8 inch.

USED 3.80 gear set, 0.009" BL, 0.026" Pinion shim thickness, Originally had an 0.018" pinion shim, but I am using a Currie pinion support. Honestly, out of my own lack of experience, when I first used the 0.018" shim I didn't make a readable pattern, dipshit...

I thought my pinion was too deep, so I went to 0.030" then to 0.026", not much difference.

Coast Side:


Drive Side:


Thanks for any help!
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Old 03-26-2010, 08:52 PM   #2 (permalink)
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Drive pattern tells me too deep. Go back to the stock pinion shim and get a good pattern on it. Use some gear oil with the marking compound as well to thin it slightly and you will get a more definite pattern.

FWIW, I tend to lean more towards the coast pattern than the drive with used gears. Both tell me too deep on that setup though.
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Old 03-26-2010, 08:58 PM   #3 (permalink)
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i concur, with used gears focus on the coast side. Also, doesn tlook like youre getting a proper pattern reading...are you applying load to the carrier when you check your pattern? a big mistake people make is to just run teh gear set through the pinion with no load...this leads to an incorrect pattern. Check the DIY on bellavista here in teh tech section, it will give you more of an idea.
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Old 03-28-2010, 06:35 PM   #4 (permalink)
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Cool...

I searched, found some info on focusing on the coast for used set, also found a tip on loading the gear to get a readable pattern!

Appreciate the help!

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Old 03-28-2010, 07:26 PM   #5 (permalink)
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I've found I get a good(readable) pattern by turning the ring gear by a ring gear bolt.

Do as these guys have said, and check back when you're gettin close.
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