That’s more or less where my truck runs and I have a 13 with low pro 22.5 and 4.33 rears. BTW in most 13 speeds 11th is direct, not 12th.
Rear End Gear Ratio
Discussion in 'Ask An Owner Operator' started by Gazoo, Aug 5, 2007.
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I think we discovered in another thread the original 13 speed went tits up. So it was replaced with a RTO15613 which ends in .87 or an easy way to say it a half hole short from what everyone today is used to.
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Yeah that's where he's getting burned on the top end. .73 final drive gives it the legs it needs.
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I thought over drive was stronger than direct??????????? -
40 in tire
3.55
.87
1700 rpm
Transmission Ratio RPM Calculator | Spicer Parts -
rank Thanks this.
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I feel left out, why no 370 ?
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Was a very good running truck,in its day. -
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