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4l80 guys, what rear ratio do you run?

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Old 12-18-2015, 12:46 PM
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Originally Posted by dirt track racer 81
Had 4.56 in mine
Nice! Also thanks again for the crossmember. It worked excellent. Pics will get published early next year.
Old 12-18-2015, 05:22 PM
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Originally Posted by Blwn99x
Nice! Also thanks again for the crossmember. It worked excellent. Pics will get published early next year.
Thanks again man!
Old 12-18-2015, 08:08 PM
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4.30's here.
Old 12-18-2015, 08:13 PM
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Originally Posted by dirt track racer 81
Had 4.56 in mine
was that on a 29" tire? what was top speed, and what RPM was that at? i need to figure out a gear ratio for my car, but i'm on a 33" tire at 3200ish lbs (guestimate)
Old 12-18-2015, 08:47 PM
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I have 4.10's.
Old 12-18-2015, 09:10 PM
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3.90s
Old 12-19-2015, 11:13 AM
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im probably going to 4.56s when my 80 goes in. i originally planned to keep the 3.73s and get a 28" tire but it doesnt look like im going to be able to get anything less than 31-33" tires to fit the rest of the combo.
Old 12-21-2015, 03:06 AM
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If it's still an 8.6" 10-bolt I wouldn't go any more than 4.10:1 in it. The pinion gear is SO tiny in a 4:56:1 set for that rear end, the lower the gear the less the tooth contact and more inherently weak it all gets.
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