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4.10's common?

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Old Jul 20, 2009 | 07:31 PM
  #1  
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From: DARTMOUTH MA
4.10's common?

i just found out today i have 4.10's - are these common for a F350 SRW - also what are the pros and cons, when my tack reads 2000 rmps my speed is 62mph, im running bf 315's
 
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Old Jul 20, 2009 | 08:11 PM
  #2  
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From: The boonies by Dallas OR
Pros - pulls a load better
Cons - burns more fuel than a 3.73 or 3.55
 
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Old Jul 20, 2009 | 10:03 PM
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...honestly, i don't think the 4.10s themselves really cause the fuel to go faster: i CAN keep my mpg the same as when i had 3.55s IF i stay off the accelerator. that is much easier said than done since 37s + 3.55 = slow and 37s + 4.10 = much faster. every now and then i just can't help myself and go blasting out of an intersection because it's summer and i can and i love showing off my truck
 
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Old Jul 20, 2009 | 10:04 PM
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your speedo is off if you have 4.10's and 315's. 70mph shoudl be 2000 rpm running 315 75 16's on 4.10 gears. 62 mph at 2000 rpm on 4.10's is stock size tire readings
 
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Old Jul 21, 2009 | 12:38 AM
  #5  
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From: Melissa TX
I have 4.10's in my 97 f-350 psd.
 
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Old Jul 21, 2009 | 07:10 AM
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I had 4.10's in mine before I swapped to a SRW rear end. Wish I would have kept the 4.10's now...
 
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Old Jul 21, 2009 | 07:37 AM
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With 33's I'm running 2400 at 70.
 
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Old Jul 21, 2009 | 07:55 AM
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From: Brandon, MB
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William, That's about what I was running before switching to 3.55's.
 
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Old Jul 21, 2009 | 08:12 AM
  #9  
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From: Ashland City, TN
I'm glad I had the 4.10's yesterday hauling hay. Woulda sucked with 3.55's

Just let the clutch out and away I was going.
Hell, I could even take off in 2nd.
 
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Old Jul 21, 2009 | 08:28 AM
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Ok... someone needs to trade me for a 4x4 5-speed truck!!!
 
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