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70mph @ 2000 rpm ok?

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Old 10-18-2012, 04:47 AM
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Default 70mph @ 2000 rpm ok?
hi,
just got my '05 RCSB with 5.3 and i was doing 70mph@2000rpm, so is that hi or low?

also can any one calculate my rear end ration based on this? tires are 265/70/17

thx
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Old 10-18-2012, 05:32 AM
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I turn 2700 at 70.. Your ok..
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Old 10-18-2012, 05:37 AM
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rear end ratio ? tires are 265/70/17
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Old 10-18-2012, 05:47 AM
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i turn 2000 @ 70 all day long in both of my trucks.
08 has a 6spd and 4:11s
94 has 4spd with 3:42s
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Old 10-18-2012, 05:48 AM
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Going guess you have 3.73
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Old 10-18-2012, 06:41 AM
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Why not look up the gear ratio RPO in glove box?
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Old 10-18-2012, 08:50 AM
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yes 2k at 70 is normal. i would also guess 3.73 gears depending on the tire size.
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Old 10-18-2012, 02:36 PM
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2k at 70mph is 3.73, unless you have tires that are way different than stock.
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Old 10-18-2012, 02:44 PM
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I run 2k & 80mph, but I'm a 6speed and 3:42's
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Old 10-18-2012, 03:12 PM
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Originally Posted by tiffo60
I run 2k & 80mph, but I'm a 6speed and 3:42's
Lucky sob

Im on 4:11s an turn 2k @ 70mph
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